HUONG P T M, THU T A, THUONG C Q, CON T H, HUONG N T
047707 HUONG P T M, THU T A, THUONG C Q, CON T H, HUONG N T (Hanoi Univ of Industry, Hanoi, Vietnam, Email: phamthimaihuong76@yahoo.com.vn, nguyenhuong0916@gmail.com) : Hexavalent chromium adsorption on magnetic nanoparticles synthesized from tay nguyen red mud from Vietnam. Asian J. Chem 2020, 32 (3), 602 - 6.
Tay Nguyen red mud abundantly found in Vietnam, is a waste product of alumina production formed during processing of bauxite. It is rich in aluminate, residual alkaline, and oxides, such as silicon, iron, and titanium oxides. Iron oxide, which constitutes 45 - 55 % of Tay Nguyen, is useful for Fe3O4 nanoparticles synthesis. In this study, a Fe3O4 nanoparticles were synthesized using Tay Nguyen by the chemical co - precipitation method, which required a non - oxidizing oxygen - free environment. Fe3O4 nanoparticles were characterized using X - ray diffraction, field emission scanning electron microscopy, Brunauer - Emmett - Teller analysis, and vibrating - sample magnetometry. Adsorption of hexavalent chromium by the nanocomposite was conducted under batch conditions. Pseudo - second - order equations were used to describe kinetic data of adsorption reactions; the equations were fitted to kinetic data as shown by the results. The isotherms of adsorption were also studied using the linear forms of the Langmuir and Freundlich equations. The Langmuir equation exhibited higher linear correlation with the experimental data than the Freundlich equation did. The maximum monolayer coverage, qmax at 297 K was 31.44 mg/g.
6 illus, 3 tables, 24 rf
LAHRAR E H, GHADRAOUI O, HARRACH A, ZOUHAIRI M, LAMCHARFI T, GHADRAOUI E H E
047706 LAHRAR E H, GHADRAOUI O, HARRACH A, ZOUHAIRI M, LAMCHARFI T, GHADRAOUI E H E (Sidi Mohamed Ben Abdellah Univ, Fez, Morocco, Email: lahrarhoucine@gmail.com ) : Influence of strontium on the structural and dielectric properties of hydrothermally processed PbTiO3 Ceramic. Asian J. Chem 2020, 32 (3), 597 - 601.
Perovskite ceramic materials of the composition Pb1 - xSrxTiO3 (PSxT) were prepared by hydrothermal process at a relatively low temperature. The solution of KOH favours the solubility of the precursors in solid state. Pressure and temperature are critical factors for the formation of pure perovskite PSxT phase. The reaction mixture in stoichiometric amount is put in an autoclave and treated at 180 ?C for 24 h. The powder obtained after grinding is treated at 400 ?C for 4 h. X - ray diffraction shows that the compounds crystallize in a pure phase of perovskite type. SEM morphology indicates a homogeneous microstructure of the grains with the presence of pores. The impedance spectroscopy study in the frequency range (1 KHz ? 2 MHz) confirms the insertion of stronium into the lead titanate matrix and highlights the strontium effect on the transition temperature (Tc) and the value of dielectric permittivity (?r).
7 illus, 3 tables, 16 ref
SHAH A A, XAVIER B, JAYALAKSHMI D
047705 SHAH A A, XAVIER B, JAYALAKSHMI D (Physics Dep, Queen Mary?s Coll, Chennai - 600 004, Email: djayalakshmi2020@gmail.com) : Preparation of spherical gold nanoparticles capped by fragaria ananassa (strawberry) fruit extract and their catalytic activity for degradation of industrial dyes. Asian J. Chem 2020, 32 (3), 592 - 6.
The prospect of developing new approaches in the assembly of noble metal nanoparticles and its functions has been garnering intense interest among researchers in various fields. The green synthesis method is an evolving trend as it is environment benign and aids in largescale formation of nanoparticles. The versatile properties of green synthesized gold nanoparticles (AuNPs) like surface plasmon resonance, stability and morphology are examined by UV - visible spectroscopy (UV - Vis), dynamic light scattering (DLS), zeta potential (ZP) and high resolution transmission electron microscopy (HRTEM) studies at pH 7. Fourier transform - infrared (FT - IR) analysis confirms the pivotal role of anthocyanins and polyphenols in Fragaria ananassa (strawberry) fruit extract for the capping of AuNPs. The size of gold nanoparticles is in the range of 10 to 40 nm and they exhibit greater negative value of zeta potential. The catalytically active AuNPs follow the pseudo - first order kinetic model and takes 10 min for rapid degradation and adsorption of methylene blue dye from aqueous solution. These results confirm that Fragaria ananassa has a remarkable function in the plant - mediated synthesis of AuNPs and thus can emerge as a positive platform to convert water pollutants into harmless molecules.
6 illus, 1 table, 32 ref
KULKARNI P N, JADHAV C K, NIPATE A S, DODAKE - SUPEKAR A M, GILL C H
047704 KULKARNI P N, JADHAV C K, NIPATE A S, DODAKE - SUPEKAR A M, GILL C H ( Chemistry Dep, Dr. Babasaheb Ambedkar Marathwada Univ, Aurangabad - 431 004, Email: chgill16@gmail.com, pankajnkulkarni@gmail.com) : Stability Indicating RP - HPLC method development and validation for dexamethasone. Asian J. Chem 2020, 32 (3), 587 - 91.
A new, simple, reliable and reproducible stability indicating RP - HPLC assay method has been developed for quantitative analysis of dexamethasone from dexamethasone tablets. This developed method has been validated according to ICH guideline with respect to system suitability, specificity, precision, linearity, accuracy and robustness. An isocratic condition of mobile phase water (0.1% orthophosphoric acid):acetonitrile in a ratio of 60:40, v/v at a flow rate of 1.0 mL/minute over RP 2.5 Fortis C18, 100 ? 4.6 mm, 2.5 ?m, column was at 27 ?C maintained. This method is specific and showed excellent linear response with correlation coefficient (R2 ) values of 0.999. In forced degradation, the proposed method has been investigated with different stress conditions as hydrolytic, oxidative, thermal and humid as recommended by ICH guidelines. An accurate and reliable reversed - phase HPLC method for the analysis of dexamethasone in dexamethasone tablets was developed and validated successfully.
3 illus, 6 tables, 14 ref
GADHAVE R V, KUCHEKAR B S
047703 GADHAVE R V, KUCHEKAR B S (1 MAEER?s Maharashtra Institute of Pharmacy, Kothrud, Pune - 411 038, Email: ranjitgadhave@gmail.com ) : Design, synthesis and biological evaluation of novel benzothiazole based [1,2,4]Triazolo[4,3 - c]quinazoline Derivatives. Asian J. Chem 2020, 32 (3), 580 - 6.
A new series of N - (benzo[d]thiazol - 2 - yl) - [1,2,4]triazolo[4,3 - c]quinazoline - 5 - carboxamide derivatives were synthesized by condensation of [1,2,4]triazolo[4,3 - c]quinazoline - 5 - carboxylate derivatives with substituted benzothiazoles. The chemical structures of the synthesized compounds were confirmed by FT - IR, MS and 1 H NMR spectra. Designed triazoloquinazoline derivatives were docked with oxido - reductase enzyme (PDB Code 4h1j) and DNA gyrase enzyme (PDB Code 3g75). Based on high binding affinity score, the best compound were selected for synthesis and subjected to in vitro antioxidant and antibacterial activity. Compounds 7a and 7d were found to be most active compounds as antioxidant agent among this series when compared with ascorbic acid. Compounds 7a, 7d and 7f were found to be most active compounds as an antibacterial agents among this series when compared with ciprofloxacin against bacterial strains such as S. aureus (ATCC 25923), E. coli (ATCC 25922) and P. aeruginosa (ATCC 27853). Study revealed that the most active compounds after structural modifications can be exploited as lead molecules for other pharmacological activities such as anti - inflammatory, anticancer and antidepressant activities.
7 illus, 1 table, 30 ref
PISE A S, BURUNGALE A S, DEVKATE S S
047702 PISE A S, BURUNGALE A S, DEVKATE S S ( Chemistry Dep, S.M. Joshi Coll, Hadapsar, Pune - 411 028, Email: ashokpise67@gmail.com) : Ultrasound assisted synthesis of 1,5 - Disubstituted Pyrazole using Cu(I) Catalyst. Asian J. Chem 2020, 32 (3), 575 - 9.
A new efficient and convenient approach towards the synthesis of pyrazole is described. The ?,? - unsaturated cyanoesters were obtained from substituted benzaldehyde and ethyl cyanoacetate by reported methods. 1,5 - Disubstituted pyrazoles were synthesized from ?,?unsaturated cyanoester and phenyl hydrazine using sodium ethoxide as a base in the presence of 10 mol % Cu(I) catalyst in high yields within 75 - 90 min under ultrasound irradiation at 60 ?C. The reaction rate is enhanced tremendously under ultrasound irradiation as compare to conventional methods with improved yields are recorded.
2 tables, 39 ref
KESUMA S, SABARUDIN A, ULFA S M
047700 KESUMA S, SABARUDIN A, ULFA S M ( Chemistry Dep, Brawijaya Univ, Malang, Indonesia , Email: sabarjpn@ub.ac.id, sabarjpn@gmail.com ) : Determination of Vitamin A and Vitamin E contents in fortified cooking oil using visible spectrophotometry. Asian J. Chem 2020, 32 (3), 565 - 9.
For measuring vitamins A and E in fortified palm oil, trichloroacetic acid (TCA) through visible spectrophotometry and total antioxidant capacity (TAC) through phenanthroline method were developed. Using TCA determination method, vitamin A was directly measured at ? = 620 nm, with 92.84 % ? 0.74 accuracy, 0.79 % RSD, 2.15 IU/g limit of detection (LOD) and 7.17 IU/g limit of quantitation (LOQ). Using the mole difference calculation method of Fe2+ after Fe3+ reduction by total antioxidants and vitamin A, vitamin E content was indirectly measured. Total antioxidant capacity required for reducing Fe3+ was determined using phenanthroline method at ? = 510 nm. The temperature and reaction time for the saponification process were also evaluated. Optimum saponification was obtained at 70 ?C in 20 min with a recovery percentage of 93.81 %. Determined Vitamin E had 93.94 % ? 0.63 accuracy, 0.68 % RSD, 0.11 IU/g LOD and 0.76 IU/g LOQ.
2 illus, 3 tables, 27 ref
AMIN A K, WIJAYA K, TRISUNARYANTI W
047698 AMIN A K, WIJAYA K, TRISUNARYANTI W (Chemistry Dep, Gadjah Mada Univ, Yogyakarta 55281, Indonesia, Email: karnawijaya@ugm.ac.id) : Physico - Chemical Properties of Nickel Promoted Sulfated Zirconia Powder Prepared using Different Procedures. Asian J. Chem 2020, 32 (3), 555 - 60.
In this work, nickel promoted sulfated zirconia (Ni/SZ) as catalyst was prepared by either by reflux (Ni/SZ - R) or hydrothermal Ni impregnation (Ni/SZ - H) routes. The aim of this study was to evaluate the influences of two preparative methods on the physico - chemical properties of prepared catalysts. Both the catalysts were characterized by XRD, FTIR, ammonia adsorption, SEM - EDX, TEM - SAED, AAS and BET. It was found that the presence of sulfate and nickel could enhance the Br?nsted and Lewis active acid sites. In relation to the effect of Ni impregnation method, acidity, amount of sulfate and Ni found in Ni/SZ - R were higher than those in Ni/SZ - H. Unfortunately, higher impregnated sulfate and nickel on zirconia support led to a decrease in surface area and pore volume and an increase in crystallite size of grainy aggregated mesoporous nickel promoted sulfated zirconia (Ni/SZ).
6 illus, 2 tables, 23 ref
DHIVYA A, YADAV R, PANDIAN K
047696 DHIVYA A, YADAV R, PANDIAN K ( Chemistry Dep, Madras Univ, Chennai - 600 059, Email: rakhiyadavres@yahoo.co.in) : Enhanced antimicrobial and cytotoxicity on cancer cell using bio - originated selenium nanoparticles. Asian J. Chem 2020, 32 (3), 543 - 9.
Present work describes the bio - originated synthesis of selenium nanoparticles using seed extract of Cassia angustifolia. The biological macromolecules in seed extract react with metal ions to generate selenium nanoparticles. The seed extract acts as reducing, capping and stabilizing agents. The selenium nanoparticles produced by the plant extract are amorphous, nearly spherical in shape and held together by protein coating in a range of about 80 - 100 nm in size, under ambient conditions. The structural properties of selenium nanoparticles were characterized by UV - visible spectroscopy, FTIR, XRD, FESEM with EDAX, HRTEM and AFM. Antibacterial and antifungal activity of selenium nanoparticles were tested against four bacterial and two fungal strains using standard agar - well diffusion method. The zone of inhibition was observed in the selenium nanoparticles against different microbes and suggested that the bio - originated selenium nanoparticles act as an effective antibacterial and antifungal agent, so it has a great latent in the preparation of drugs used against pathogenic diseases. The cytotoxicity of bio - originated selenium nanoparticles was tested under in vitro conditions on Vero cell line and had compared with MDA - MB231 cancer cell line at different concentrations and the results had proved that bio - originated synthesis selenium nanoparticles can inhibit the growth of human breast - cancer cells by concentration - dependent manner.
4 illus, 2 tables, 50 ref
ARTHI S, SUMALATHA D, SUSMITHA K, BHARGAVI M, JOSEPH A J
047695 ARTHI S, SUMALATHA D, SUSMITHA K, BHARGAVI M, JOSEPH A J ( Chemistry Dep, St. Francis Coll for Women, Hyderabad - 500 016, Email: sumalatha.dandu@yahoo.com) : 4 - Aminoindane derived novel schiff base metal complexes: Synthesis, Characterization, DNA binding and molecular docking studies. Asian J. Chem 2020, 32 (3), 539 - 42.
A novel Schiff base [SAL - L=2 - ((2,3 - dihydro - 1H - inden - 4 - ylimino)methyl phenol] was synthesized and used as ligand for the synthesis of Ni(II) and Co(II) complexes. The structural characterization of ligand and its Ni(II) and Co(II) complexes was determined using various spectroscopic methods. Based on spectral studies, a square planar and octahedral geometry have been proposed for Ni(II) and Co(II) complexes, respectively. DNA binding properties of these metal complexes with calf - thymus DNA in tris - hydrochloride buffer (pH 7.2) were investigated using UV - visible absorption studies. The binding constants were in the order of 105 M - 1 suggested a good binding affinity towards CT - DNA. The synthesized ligand is docked on TSPO protein showing good binding energy and found to be a potent inhibitor of cancer.
4 illus, 1 table, 33 ref
LOGANATHAN A, SIVAKUMAR A, MURUGESAN B, SIVAKUMAR P
047694 LOGANATHAN A, SIVAKUMAR A, MURUGESAN B, SIVAKUMAR P ( Chemistry Dep, Arignar Anna Govt. Arts & Science Coll, Namakkal - 637 002, Email: shivagobi@yahoo.com) : Green Synthesis and Applications of Nano CeO2/rGO Solar Active Photocatalyst for the Degradation of Basic Auramine - O Dye. Asian J. Chem 2020, 32 (3), 528 - 38.
In present study, the preparation of solar active photocatalyst and its application for the detoxification and degradation of dye molecules in aqueous medium is demonstrated. The reduced graphene oxide (rGO) is prepared from graphene oxide (GO) using Carica papaya leaf extract. Nanosize CeO2 was coated over the rGO surface to make a nanocomposite photocatalyst. Prepared composite catalyst was characterized using SEM, HRTEM, XRD, EDX, FTIR, FT - Raman and UV - DRS techniques. The prepared composite catalyst was used for the degradation of auramine - O dye in its aqueous solution using UV and solar irradiations. The degradation kinetics is also evaluated using Langmuir - Hinshelwood kinetic model. The kinetic curves are analyzed using basic algorithm. A deviation from the experimental values and the reaction order is enumerated.
12 illus, 2 tables, 65 ref
KANDE S R, ZAWARE B H, MULEY G G, GAMBHIRE A B
047693 KANDE S R, ZAWARE B H, MULEY G G, GAMBHIRE A B ( Chemistry Dep, Shri Anand Coll, Pathardi - 414 102, Email: abg_chem@ymail.com) : Co - Doped SnO2 Supported on Activated Carbon: An Efficient Solar Photocatalyst for the Degradation of Rhodamine B. Asian J. Chem 2020, 32 (3), 519 - 27.
A series of SnO2/activated carbon (AC) nanomaterials were prepared by co - doping V(III), Cr(III), Mn(II), Fe(III), Co(III), Ni(II), Cu(II), Zn(II) with nitrogen and sulphur, separately by co - precipitation method, combined with surfactant incorporation method. The as - prepared sample were characterized by X - ray diffraction (XRD), transmission electron microscopy (TEM), X - ray photoelectron spectra (XPS), Brunauer - Teller method (BET), diffuse reflectance spectroscopy (DRS), photoluminescence (PL) and Raman spectroscopy. The results showed that the phase composition, crystallite size, BET surface area and optical absorption of samples varied significantly with the nature dopants. The photocatalytic activities of these co - doped SnO2/AC catalysts were investigated by degradation rhodamine B in aqueous solution under solar - light illumination. The results showed an appreciable enhancement in the photoactivity of Fe/N/SnO2/AC as compared to other co - doped SnO2/AC because of smaller particle size, higher specific surface area, photogenerated carrier?s separation and solar light absorption. The degradation rate of rhodamine B dye reached 98 % in 30 min, which is about 10 times higher than that of pure SnO2.
7 illus, 1 table, 35 ref
NGUYEN T V, DINH V
047692 NGUYEN T V, DINH V (Nguyen Tat Thanh Univ, Ho Chi Minh City, Vietnam, Email: ntvan@ntt.edu.vn) : Isolation of kaempferol from vietnamese ginkgo biloba leaves by preparative column chromatography. Asian J. Chem 2020, 32 (3), 515 - 8.
The aim of this research was to develop a simple procedure to isolate kaempferol from Ginkgo biloba leaves extract. Flavonoids present in Ginkgo biloba leaves were extracted by 96 % ethanol. These flavonol glycosides which were hydrolyzed in the presence of HCl to convert to aglycones. The flavonol aglycones were extracted by the hydrolysis of solution with ethyl acetate which was evaporated to dryness under reduced pressure to obtain concentrated flavonol aglycones (C2). Flavonol aglycones were then purified by preparative column chromatography with a mobile phase composed of petroleum ether - ethyl acetate to acquire fraction C3. The recrystallization of fraction C3 in acetone realizes to have an amorphous sediment as fraction C4 that was supposed to be a mixture of kaempferol, quercetin and isorhamnetin. Kaempferol in this sediment was purified by column chromatography with a mobile phase composed of CHCl3 - MeOH to achieve a fraction denoted as fraction C5. The isolated fraction C5 was assigned by its purity and structure by thin layer chromatography (TLC), high performance liquid chromatography (HPLC) and spectroscopic data analyses.
4 illus, 3 tables, 14 ref
SHETTY K, PRATHIBHA B S, RANGAPPA D, ANANTHARAJU K S, NAGASWARUPA H P, GANGARAJU V
047690 SHETTY K, PRATHIBHA B S, RANGAPPA D, ANANTHARAJU K S, NAGASWARUPA H P, GANGARAJU V ( Chemistry Dep, B.N.M. Institute of Technology, Bangalore - 560 070, Email: pratbnmit@gmail.com, dineshrangappa@gmail.com ) : Study of green and chemical methods for synthesis of nano spinel MgFe2O4 and its study on degradation of rose bengal dye. Asian J. Chem 2020, 32 (3), 501 - 7.
MgFe2O4 nanoferrites were synthesized by sol - gel and solution combustion synthesis (SCS) methods through green and chemical methods. Green and chemical methods for sol - gel were processed with use of lemon extract and citric acid, respectively. A green and chemical method for solution combustion synthesis was followed by using Phyllanthus acidus leaf extract and urea, respectively. The influence of synthesis approach on the behaviour of prepared nanoferrites were studied using powder X - ray diffraction (PXRD), Fourier transform infrared spectroscopy (FT - IR), scanning electron microscopy (SEM) and UV visible spectroscopy, vast variation in particle size, crystallinity, electrochemical and photocatalytic activity of the nanoferrites synthesized by various methods were witnessed. Powder X - ray diffraction (PXRD) result of prepared nanoferrites acquired by green and chemical approaches clarified phase structure as spinel and the crystalline size found to be around 11 - 24 nm. The spinel surface morphology was witnessed for the synthesized nanoferrites. The tetrahedral and octahedral sites of the prepared nanoferrites were confirmed by FTIR spectra. MgFe2O4 nanoferrites synthesized by green sol - gel approach exposed superior electrochemical activity by possessing very less charge transfer resistance. The results of EIS were correlated with the photocatalytic degradation of Rose Bengal dye. Photocatalytic property of the prepared nanoferrites was examined for photodegradation of Rose Bengal dye under UV - light.
8 illus, 1 table, 28 ref
KUMAR R, SHARMA H, VISHWAKARMA M C, JOSHI S K, BHANDARI N S, KANDPAL N D
047689 KUMAR R, SHARMA H, VISHWAKARMA M C, JOSHI S K, BHANDARI N S, KANDPAL N D ( Chemistry Dep, Kumaun Univ, Almora - 263 601, Email: rathourrajesh22july@gmail.com) : Adsorptive removal of Pb(II), Cu(II) and Cd(II) ions onto rubus ellipticus as low - cost biosorbent. Asian J. Chem 2020, 32 (3), 495 - 500.
In the present study, removal efficiency (%) of Rubus ellipticus leaves (REL) as an adsorbent for the removal of Pb(II), Cu(II) and Cd(II) ions was investigated. Different parameters i.e., pH, contact time, temperature, adsorbent dose and initial metal ion concentration were investigated to obtain the optimum adsorption efficiency. At pH 4, a maximum adsorption was 84.6, 80.2 and 74.5 % for Pb(II), Cu(II) and Cd(II) ions, respectively. The maximum adsorption of all the three metal ions obtained at contact time (75 min), initial metal ion concentration (10 mg/L), temperature (25 ?C) and adsorbent dose (5.0 g). The equilibrium adsorption of Pb(II), Cu(II) and Cd(II) ions at different temperature was described by Langmuir, Freundlich and Temkin isotherms. The equilibrium data fitted well the Langmuir adsorption isotherm. Thermodynamic parameters like Gibb?s free energy (?G?), enthalpy (?H?) and entropy (?S?) were also calculated. The calculated parameters indicated that adsorption of Pb(II), Cu(II) and Cd(II) ions onto Rubus ellipticus leaves (REL) was spontaneous (?G? < 0), endothermic (?G? > 0). The feasibility of the process was evident from the positive value of ?S?.
7 illus, 4 tables, 36 ref
VIMALA B, JAYAPRADHA S R, SELVAN A
047688 VIMALA B, JAYAPRADHA S R, SELVAN A ( Chemistry Dep, Government Arts Coll for Women, Nilakottai - 624 208, Email: selvamithu6970@gmail.com) : Template synthesis and characterization of transition metal complexes of 13, 15 and 17 - membered tetraamide macrocyclic disubstituted dimethyl tetrasubstituted tetraazacycloalka tetrasubstituted tetraene disubstiuted diol. Asian J. Chem 2020, 32 (3), 488 - 94.
A series of new transition metal complexes [ML(Ln)Cl2] where Ln = L13, L15 and L17 (L(13) = 11,13 - dimethyl - 1,4,7,10 - tetraazacyclotrideca - 4,6,10,13 - tetraene - 5,6 - diol, L(15) = 9,11 - dimethyl - 1,4,8,12 - tetraazacyclopentadeca - 1,3,8,11 - tetraene - 2,3 - diol and L(17) = 10,12 - dimethyl - 1,4,9,13 - tetraazacycloheptadeca - 1,3,9,12 - tetraene - 2,3 - diol) and M = Cu(II), Co(II), Ni(II), Mn(II) and Zn(II) have been synthesized by template method. All the synthesized complexes were characterized by IR, UV, ESR, X - ray microanalysis, elemental analysis, thermal studies and magnetic susceptibilities and the geometry of the complexes found to be octahedral.
12 illus, 2 tables, 63 ref
SANTOSH G
047687 SANTOSH G ( Chemistry Dep, Vellore Institute of Technology , Chennai - 600 127, Email: santoshg@vit.ac.in) : Porphyrins with five - membered ring substituents on meso - position and their derivatives. Asian J. Chem 2020, 32 (3), 477 - 87.
Tetrapyrrolic porphyrins are the molecules of choice for nature where light absorption and metal based chemistry plays an important role in biological systems. Constant efforts are directed at modifying the porphyrin skeletal structure to result in porphyrins with fine - tuned physical properties. This review focusses on the chemistry of porphyrins with five - membered aromatic rings such as furan, pyrrole and thiophene as substituents at the meso position of porphyrins. Substitution with these five - membered rings at the meso - position of porphyrins brings about significant modulation of HOMO - LUMO gap, which reflects in shifts in the absorption and fluorescence spectra and in their electrochemical properties compared to the conventional porphyrins with six - membered aryl substituents. The synthetic modification of these five - membered rings by introdcution of various functional groups were also discussed.
15 illus, 1 table, 38 ref
REDDY G B, RAJKUMAR B, MANGATAYARU K G, RAO T V D P
047686 REDDY G B, RAJKUMAR B, MANGATAYARU K G, RAO T V D P ( Chemistry Dep, Osmania Univ, Hyderabad - 500 007, Email: thyp123@gmail.com) : Rapid synthesis of gold nanoparticles with ginger waste using microwave irradiation. Asian J. Chem 2020, 32 (2), 471 - 6.
In the present investigation, synthesis of gold nanoparticles (AuNPs) was carried out with microwave irradiation of HAuCl4 and the extract of ginger waste. Synthesized AuNPs were characterized by various techniques including UV - visible spectroscopy (UV - vis), Fourier transform infrared spectroscopy (FTIR), X - ray powder diffraction (XRD), dynamic light scattering (DLS) and transmission electron microscopy (TEM). The TEM images revealed that the nanoparticles were spherical in shape and the average particle size of the AuNPs was found to be approximately 6 ? 2 nm. The stability of gold nanoparticles was analyzed by zeta potential measurements. A negative zeta potential value of - 18.4 mV indicates the stability of the AuNPs. Further, gold nanoparticles exhibited the excellent catalytic activity in reducing 4 - nitrophenol to 4 - aminophenol in the presence of NaBH4 (reducing agent), and it was found to depend on the amount of AuNPs and temperature. Gold nanoparticles did not show any significant antibacterial activity against the pathogenic bacteria studied.
11 illus, 2 tables, 27 ref
SINGH B, LAL C
047685 SINGH B, LAL C ( Chemistry Dep, Harcourt Butler Technological Institute, Kanpur - 208 002, Email: c.lal9940@gmail.com) : Enhanced efficiency of photogalvanic cell based on mixed triphenylmethane dyes. Asian J. Chem 2020, 32 (2), 466 - 70.
The study focused on the enhancement of solar power generation and storage capacity of a photogalvanic cell ethylene diaminetetraacetic acid as reductant, xylene cyanol FF and patent blue as photosensitizers. This chemical system with changed concentrations, a combination electrode and a very small Pt electrode was used to fabricate a modified photogalvanic cell. The modified cell showed greatly enhanced performance in terms of photopotential (868.0 mV), photocurrent (230.0 ?A), efficiency (0.64 %) and the maximum output (power) of the cell was found to be 199.64 W. The photogalvanic cell can be used at this power level for 115 min in the dark due to the storage capacity of the cell. The effects of various parameters such as pH, reductant concentration, dye concentration, diffusion length, light intensity, and electrode area on electrical output of the cell were also investigated. The current - voltage (i - v) characteristics of the cell have been studied and a mechanism for the photocurrent generation in photogalvanic cell has also been proposed.
3 illus, 5 tables, 27 ref
CHIEN N D, IVANOVICH V A, ALEXANDROVNA G N
047684 CHIEN N D, IVANOVICH V A, ALEXANDROVNA G N (Vietnam Academia Science and Technology, Hanoi, Vietnam, Email: ngudichi@yandex.ru) : Salinity effect on adsorption of phenol by activated carbon from sugarcane bagasse. Asian J. Chem 2020, 32 (2), 463 - 5.
Activated carbon was obtained from sugarcane bagasse was studied and comparing with commercial activated carbon from coconut shell. Porosity parameters of the samples were calculated by low temperature nitrogen adsorption by using some theories. Adsorption of phenol on sample was studied in comparing with commercial activated carbon. Effect of salinity on phenol adsorption was studied by assessment effectivity of phenol removal from aqueous solution. It has been shown that the presence of sodium chloride in solution can increase adsorption of phenol by activated carbon.
4 illus, 1 table, 16 ref
YAKU G, RAJKUMAR B, RAO T V D P
047683 YAKU G, RAJKUMAR B, RAO T V D P ( Chemistry Dep, Osmania Univ, Hyderabad - 500 007, Email: thyp123@gmail.com ) : Microwave assisted green synthesis of silver nanoparticles using pomegranate peel extract: Characterization and antibacterial activity studies. Asian J. Chem 2020, 32 (2), 458 - 62.
In the present work, a simple and low cost and eco - friendly technique is applied for the microwave assisted synthesis of silver nanoparticles (AgNPs) using the extract of pomegranate peel wastes, which does not require any use of external stabilizing agent. The extract of pomegranates peelings waste served as a reducing as well as capping/stabilizing agent. The synthesized silver nanoparticles were characterized by using powder X - ray diffraction (XRD), transmission eelectron microscopy (TEM), FT - IR, UV - visible spectroscopy and scanning electron microscopy - energy dispersive X - ray analysis (SEM - EDX). The stability of AgNPs was analyzed by zeta potential measurements. The antibacterial activity of synthesized AgNPs was also evaluated on six Gram - positive and Gram - negative bacteria using agar well diffusion method.
5 illus, 4 tables, 33 ref
MALIK R A, CHATTREE A
047682 MALIK R A, CHATTREE A ( Chemistry Dep, Sam Higginbottom Univ of Agriculture, Technology and Sciences, Allahabad - 211 007, Email: malikraqeeb123@gmail.com ) : Synthesis of Fluorescent Rhodium(II) and Iridium(II) Complexes Promoted by 2,6 - Bistetrazolate Pyridine Ligand. Asian J. Chem 2020, 32 (2), 451 - 7.
Tridentate N - donor ligand 2,6 - bistetrazolate pyridine (H2pytz) has been prepared from 2,6 - pyridinedicarbonitrile and used for coordination with transition metals [M(pytz)2](NHEt3)2, (M = Rh, Ir). The structure of Rh and Ir complexes was determined by UV, FT - IR, 1 H NMR, XRD and elemental analysis. Moreover, the absorption spectra of complexes were shifted towards the visible region (367.2 nm for Rh and 370.8 nm for Ir). The ? - excessive, lone pair nitrogen donors and extended unsaturation of ligand triggers the visible fluorescence spectra upto 528.5 nm for rhodium complex and 557.5 nm for iridium complex. The antibacterial activity results revealed that S. aureus and E. coli showed maximum response followed by K. pneumoniae and B. cereus, respectively. The maximum zone of inhibition of complexes was observed at 6 mg/mL concentration viz. S. aureus, 15.0 ? 1.15 mm for rhodium complex and E. coli, 14.6 ? 1.15 mm for iridium complex. Therefore, 2,6 - bistetrazolate pyridine (H2pytz) ligand tune the photo - physical properties of the complexes as well as their applications in the biological fields.
5 illus, 2 tables, 29 ref
KOTTALANKA R K, PAGADALA E, LOKE S K, RAJKUMAR S R J, SRINIVASADESIKAN V, RAMCHANDRAN B
047681 KOTTALANKA R K, PAGADALA E, LOKE S K, RAJKUMAR S R J, SRINIVASADESIKAN V, RAMCHANDRAN B (Sciences and Humanities Dep, Vignan?s Foundation for Science, Technology and Research, Vadlamudi - 522 213, Email: ravikottalanka@gmail.com) : Biological Evolution of Titanium(IV) Complex [{(NNO)2Ti}3O3] bearing bidentate heteroditopic schiff base ligand: synthesis, structure and biological studies. Asian J. Chem 2020, 32 (2), 441 - 50.
Titanium(IV) - complex of chemical composition [{(NNO)2Ti}3O3] (2) bearing bidentate heteroditopic Schiff base [(C5H4OH) - N=CHC4H3 - NH] (L1) ligand in titanium coordination sphere was reported and its biological significance was evaluated. The in vitro cytotoxicity of L1 and 2 were evaluated by using MTT assay on cancer cell lines (MCF - 7 & A549) and observed significant cytotoxicity. Further, the LDH and NO assay studies on both L1 and 2 on cancer cell lines revealed that the enhanced cytotoxicity compared to standard anticancer drug i.e. cisplatin. The DNA binding studies of tested compounds with Ct - DNA molecule by using UV - visible and fluorescence spectra and molecular docking studies revealed that moderate to good binding interactions with test molecules. Thus, the present work contributes and implies the biological significance of Ti - complex (2) and the correlation between the structure and the biological activities of such Ti - complexes supported by Schiff base systems opens up opportunities for further exploitation of similar biologically active titanium systems.
10 illus, 54 ref
SREERAM V, RAO M V B, RAO K P
047680 SREERAM V, RAO M V B, RAO K P ( Chemistry Dep, A.G. & S.G. Siddhartha Degree Coll of Arts & Science, Vuyyuru - 521 165, Email: sreeramvenigalla2008@gmail.com, drkpr_sh@vignan.ac.in, kprao2005@gmail.com) : Impact of 2 - Aminonicotinic Acid and/or ? - Cyclodextrin on the Morphology of Metal Carbonates (M = Ca2+ and Sr2+) Crystallization. Asian J. Chem 2020, 32 (2), 435 - 40.
We examined the crystallization impact of the surfactant, 2 - aminonicotinic acid and/or ? - cyclodextrin on the formation of two anhydrous metal carbonates, MCO3 (M = Ca2+ and Sr2+), from their respective calcium chloride and strontium chloride salts along with NaHCO3 at room temperature. By varying the concentrations of this hybrid surfactant to the concentrations of MCO3 during the preparations and examined their particle sizes by PXRD, FTIR, TGA and SEM. The characterization on these newly formed anhydrous metal carbonates clearly indicated that CaCO3 formed with three different shapes such as truncated calcite, hexagonal calcite and rod shaped aragonite. Whereas, SrCO3 formed with two different shapes such as hexagonal poles and bloom scale bars by varying concentrations of the surfactants. The mixed surfactant certainly made an impact on the metal carbonates formations with different shapes and sizes by varying surfactants concentrations and conditions.
10 illus, 27 ref
BENTEBBA F Z, GHIABA Z, SAIDI M, BENSASI C
047677 BENTEBBA F Z, GHIABA Z, SAIDI M, BENSASI C (Kasdi Merbah Univ, Ouargla, Algeria Ouargla, Algeria , Email: fbentebba@gmail.com) : Effects of development and ripening stage on phytochemical compositions, antioxidant and antibacterial activities of date palm fruits. Asian J. Chem 2020, 32 (2), 415 - 9.
Edible parts of two dates cultivars (Deguel ahmar and Tanslit) at four maturation stages khellal, besser, rutab and tamr were analyzed for their phytochemical composition (total phenolic, total flavonoid and condensed tannins contents) as well as antioxidant and antibacterial activities. The antioxidant activity evaluated in vitro using scavenging assays of 1,1 - diphenyl - 2 - picrylhydrazyl (DPPH) radical and 2,2? - azino - bis(3 - ethylbenzothiazoline - 6 - sulfonic acid) (ABTS) radical and ferric reducing power. Antibacterial activity of extracts were evaluated in vitro by the agar disk diffusion method against five pathogenic bacterias trains: Bacillus subtilis ATCC 6633, Enterococcus ATCC 3315, Staphylococcus aureus ATCC 43300, Escherichia coli ATCC 25922 and Pseudomonas aeruginosa ATCC 7320. Results suggested that the content of these phytochemicals are very important at khellal stage and then decreased during maturation followed by a decrease in the antioxidant activity.
3 illus, 2 tables, 27 ref
SELVARAJ R, SURESH J, ARUN A
047676 SELVARAJ R, SURESH J, ARUN A (Bharathiar Univ, Coimbatore - 641 046, Email: aruna2075@yahoo.co.in) : Cyanuric chloride containing chalcones for possible breast cancer treatment: synthesis, antimicrobial and in silico screening. Asian J. Chem 2020, 32 (2), 408 - 14.
In this work, we have synthesized efficient antibacterial compounds with anticancer novel molecules based on cyanuric chloride containing chalcone moiety. For this, novel triazine - based organic molecules were synthesized by using cyanuric chloride and 2,4 - dichloro - 1 - ene(4 - hydroxyphenyl)phenone and characterized by elemental analysis, FT - IR, NMR and UV - visible spectrometry techniques. Melting point of the molecules were increased with an increase in substitution on cyanuric chloride. The minimum inhibitory concentration (MIC) value of the synthesized compounds showed an excellent result on Gram - negative bacteria with low MIC value of 1.95 ?g/mL. Gram - positive bacteria showed little resistance to the synthesized drug. The synthesized compounds were tested for their use as an anticancer drug using in silico screening method. The synthesized compounds in silico molecular docking method using breast cancer protein (BRCA2) confirms that triazine derivative with all three chlorine molecules replaced by 2,4 - dichloro - 1 - ene(4 - hydroxyphenyl)phenone showed highest binding energy with the value of - 9.1900 Kcal/mol which is in agreement with the observed high MIC value obtained for Gram - negative bacteria. The synthesized molecules preferentially targeted the topoisomerase II of the bacteria. Overall, an efficient antimicrobial drug is synthesized using a simple preparation method.
8 illus, 2 tables, 22 ref
KUMAR M D, RAJESH P, DHARSINI R P, INBAN M E
047675 KUMAR M D, RAJESH P, DHARSINI R P, INBAN M E ( Chemistry Dep, Dr. N.G.P Arts and Science Coll, Coimbatore - 641 048, Email: dineshkumarm@drngpasc.ac.in ) : Molecular Geometry, NLO, MEP, HOMO - LUMO and mulliken charges of substituted piperidine phenyl hydrazines by using density functional theory. Asian J. Chem 2020, 32 (2), 401 - 7.
The quantum chemical calculations of organic compounds viz. (E) - 1 - (2,6 - bis(4 - chlorophenyl) - 3 - ethylpiperidine - 4 - ylidene) - 2 - phenylhydrazine (3ECl), (E) - 1 - (2,6 - bis(4 - chlorophenyl) - 3 - methylpiperidine - 4 - ylidene) - 2 - phenylhydrazine (3MCl) and (E) - 1 - (2,6 - bis(4 - chlorophenyl) - 3,5 - dimethylpiperidine - 4 - ylidene) - 2 - phenylhydrazine (3,5 - DMCl) have been performed by density functional theory (DFT) using B3LYP method with 6 - 311G (d,p) basis set. The electronic properties such as Frontier orbital and band gap energies have been calculated using DFT. Global reactivity descriptor has been computed to predict chemical stability and reactivity of the molecule. The chemical reactivity sites of compounds were predicted by mapping molecular electrostatic potential (MEP) surface over optimized geometries and comparing these with MEP map generated over crystal structures. The charge distribution of molecules predict by using Mulliken atomic charges. The non - linear optical property was predicted and interpreted the dipole moment (?), polarizability (?) and hyperpolarizability (?) by using density functional theory.
4 illus, 6 tables, 34 ref
THAILAN V
047674 THAILAN V ( Chemistry Dep, Annapoorana Engineering Coll, Salem - 636 308, Email: vthailan.2008@gmail.com) : Characterisation and Anti - Corrosion Behaviour of Isolated Vasicinone Compound on Mild Steel. Asian J. Chem 2020, 32 (2), 395 - 400.
The availability of naturally occurring substances has been investigated as more efficient in prevention of corrosion. Due to the biodegradation, eco - friendliness, less expensive, not much of toxic and easy availability of naturally occurring material were used as corrosion inhibitors in the recent years. Based on these needs, this study is focused on the isolation, characterization and inhibition effect of vasicinone isolated from ethanolic exact of Adhatoda vasica leaves in 1N HCl. The isolated compound was analyzed using spectral studies and also it is subjected to various corrosion parameters such as weight loss method and electrochemical methods. The result reveals that isolated extract of vasicinone from ethanol extract of Adhatoda vasica leaves inhibits the mild steel material in an effective manner in 1N HCl medium. Further surface morphological studies were also confirmed that the compound shows better efficiency.
7 illus, 4 tables, 30 ref
XIONG H, ZHANG N, CHEN W, WU X, WU Z
047673 XIONG H, ZHANG N, CHEN W, WU X, WU Z (Second Military Medical Univ, Shanghai 200003, P.R. China, Email: 332954266@qq.com, wuzhijun999@sina.com) : Chemical constituents of ainsliaea yunnanensis franch. Asian J. Chem 2020, 32 (2), 391 - 4.
Chemical investigation of the constituents of the whole herb of Ainsliaea yunnanensis Franch has led to isolation of hentriacontane (1), (6Z,9Z) - henicosa - 6, 9 - diene (2), methyl linoleate (3), dodecyl (Z) - 9 - hexadecenoate (4), heptadecan - 8 - ol (5), ? - linolenic acid (6), (Z) - 6 - hexadecenoic acid (7), (Z) - 10 - eicosenoic acid (8), stearic acid (9), phytenoic acid (10), tripalmitolein (11), trilinolenin (12), phthalic acid bis - (2 - ethylhexyl) ester (13), diisobutyl phthalate (14), 2 - hydroxy - butanedioic acid - 4 - methyl ester (15), diacylgalactolipids I (16), ? - Dgalactopyranoside - 1,2 - bis[(1 - oxo - 9,12,15 - octadecatrienyl)oxy]propyl (17), (2S) - 1,2 - O - (9Z,12Z - octadecadienoyl) - 3 - O - [? - Dgalactopyranosyl - (1?????6???) - O - ? - D - galactopyranosyl]glycerol (18). The structures of the compounds were identified by comparison of their NMR data with literature data.
25 ref
VENKATESHAPPA G, KUMAR P R, KRISHNA
047671 VENKATESHAPPA G, KUMAR P R, KRISHNA (Studies and Research in Chemistry Dep, Tumkur Univ, Tumkur - 572 103, Email: raghukp1@gmail.com) : Synthesis, characterization and antimicrobial activity of N - 2 - (4 - Chlorophenyl)acetyl Derivatives of (S) - Amino Acids. Asian J. Chem 2020, 32 (2), 381 - 4.
This paper reports the synthesis, characterization and antibacterial activity of N - 2 - (4 - chlorophenyl)acetyl derivatives of various (S) - amino acids such as (S) - alanine, (S) - phenylalanine, (S) - leucine, (S) - methionine, (S) - proline and (S) - tryptophane. These compounds have been successfully synthesized and their structures were confirmed by 1 H NMR and 13C NMR and FT - IR spectroscopy. The antimicrobial activity of these six (S) - amino acids derivatives have been evaluated by the agar well diffusion method against pathogens both Grampositive (S. aureus) and Gram - negative (K. aerogenes, E. coli and P. desmolyticumas) bacteria and fungi (A. flavus and C. albicans). All these compounds have shown mild to moderate antimicrobial activity
1 table, 20 ref
SINGH A K, SHRIVASTAVA A, SHRIVASTAVA D R, PATEL R, SACHDEV N
047668 SINGH A K, SHRIVASTAVA A, SHRIVASTAVA D R, PATEL R, SACHDEV N ( Chemistry Dep, Indira Gandhi Government Arts, Commerce and Science Coll, Vaishali Nagar, Bhilai, Durg - 490 020, Email: alpashubhe@yahoo.com) : Kinetics of micellar effect of non - ionic surfactant on oxidative degradation of ciprofloxacin. Asian J. Chem 2020, 32 (2), 359 - 68.
Oxidative degradation kinetics of leading fluoroquinolone family drug ciprofloxacin (CIP) by chloramine - T (CAT) in TX - 100 micelle media was studied spectrophotometrically at 275 nm and 298 K. In pseudo - first - order conditions the rate constant (kobs) decreased regularly with increasing [TX - 100]. To understand the self - organizing activities of TX - 100, CMC values in varying reaction conditions had been evaluated. The role of non - ionic surfactant in the oxidative degradation process of ciprofloxacin by chlorinating agent chloramineT is explained in terms of mathematical model explained by Menger - Portnoy. The reaction showed first to zero order dependence on [CAT] and fractional order on [CIP]. Increasing [H+ ] decreased the rate of reaction. The effect of ionic strength and solvent polarity of the medium in reaction conditions were studied. The effects of added salts [HSO4Na], [KCl], [KNO3] and [K2SO4] had also been studied. The stoichiometry of the reaction determined was 1:2 and the oxidation products were identified by LC - EI - MS. The analysis of degradation product of ciprofloxacin evidently reveals that the piperazine moiety is active site for oxidation in the reaction. Activation parameters were studied to propose appropriate mechanism for the reaction.
11 illus, 9 tables, 29 ref
ALKHURSANI S A, MADANI M, GHOBASHY M M
047666 ALKHURSANI S A, MADANI M, GHOBASHY M M (Imama Abdulrahman Bin Faisal Univ, Jubail, Saudi Arabia, Email: salkhursani@iau.edu.sa, mohamed.ghobashy@eaea.org.eg) : Photocatalytic TiO2 Embedded on PET - g - PAAc fabric by sono - gamma irradiation technique. Asian J. Chem 2020, 32 (2), 349 - 53.
Fabrication of photocatalytic TiO2 particles onto PET - g - PAAc fabric has been succeeded by ultrasonic - gamma irradiation methods. Ultrasonic irradiation assisted for good distribution of TiO2 particles onto the surface of PET fabric in a uniform manner at ambient conditions. The product modify PET fabric was characterized by attenuated total reflection - Fourier transform infrared (ATR - FTIR) confirmed the grafting of COOH groups onto PET fabric. SEM images revealed a good dispersed and adherent obtained TiO2 particle onto PET fabric. Results obtained from X - ray diffraction indicating TiO2 (Degussa P25) in the anatase and rutile phases. The degradation process of three different dyes remazol red, amido black and toluidine blue from aqueous solutions by TiO2@PET - g - PAAc was investigated using modified photo reactor. It was found that decoluorization of toluidine blue was 99 % after 60 min. The reused of TiO2@PET - gPAAc showed that the activity of TiO2@PET - g - PAAc for degradation still remained good which conclude that PET fabric makes TiO2 easily recovered, which overcomes the disadvantage of separation difficulty of common catalyst after or through degradation processing.
4 tables, 29 ref
REKHA M, KOWSALYA M
047665 REKHA M, KOWSALYA M (Energy and Power Electronics Dep, Vellore Institute of Technology, Vellore - 632 014, Email: mkowsalya@vit.ac.in) : A new organic dye cordia sebestena sensitized solar cell with current - voltage characteristics. Asian J. Chem 2020, 32 (2), 342 - 8.
Titanium dioxide nanoparticles have been synthesized by a novel modified sol - gel for the fabrication of natural dye sensitized solar cells. The natural photo sensitizer extracted from Cordia sebestena flower was mixed with the precursor solution. The flower dye has put the effort of a surfactant which has resulted colourized TiO2 instead of white TiO2. When compared to the conventional sol - gel method, this modified process has enhanced the properties of TiO2 like, morphology, uniformity in dye absorption. It has reduced the agglomeration of TiO2 and dye aggregation significantly. The optimized molecular geometry of sebestenoid D, the major pigment of Cordia sebestena and HOMO - LUMO plot are found using density functional theory. The TiO2 nanoparticles were subjected to structural, optical, spectral and morphological studies which showed improved properties in modified sol - gel process. Ecofriendly and low - cost natural dye sensitized solar cells (DSSC) were fabricated using conventional and pre - dye treated TiO2 sensitized by Cordia sebestena flower extract. The I - V studies showed the solar light photon to electron conversion efficiencies of 0.87 and 1.28 % for sol - gel and modified sol - gel methods, respectively. There has been an enhancement in efficiency by 47 % in modified sol - gel method which is very much promising in terms of efficiency for natural dye sensitized solar cells.
8 illus, 26 ref
SHINDE S B, DESHPANDE R M
047664 SHINDE S B, DESHPANDE R M ( Chemistry Dep, Savitribai Phule Pune Univ, Pune - 411 030, Email: sbs1977@gmail.com) : Catalytic hydrogenation of cinnamic acid and salicylic acid. Asian J. Chem 2020, 32 (2), 339 - 41.
Hydrogenation of cinnamic acid and salicylic acid was carried out using 5 %Ru/C, 5 % Pd/C and Ru - Sn/Al2O3 catalyst at 493 K and 6.89 MPa of hydrogen partial pressure. Ru - Sn/Al2O3 catalyst was found to be active for hydrogenation - COOH group to give cinnamyl alcohol. The selectivity to cinnamyl alcohol was low (15 %) as absolute inhibition of C=C bond hydrogenation in cinnamic acid is challenging. 5 %Pd/C catalyst was found to hydrogenate C=C bond and aromatic ring in cinnamic acid. 5 %Ru/C catalyst was found to be least selective catalyst as it hydrogenated C=C bond, aromatic ring and - COOH group in cinnamic acid. Hydrogenation of salicylic acid is not possible at 493 K as decarboxylation of salicylic acid occurs.
13 ref
MAI H C, NGUYEN D C, NHAN N P T, BACH L G
047663 MAI H C, NGUYEN D C, NHAN N P T, BACH L G (Chemical Engineering Dep, Nong Lam Univ, Ho Chi Minh City, Vietnam, Email: maihuynhcang@hcmuaf.edu.vn, blgiangntt@gmail.com) : Physico - chemical properties of sacha inchi (Plukenetia volubilis L.) seed oil from Vietnam. Asian J. Chem 2020, 32 (2), 335 - 8.
Sacha inchi (Plukenetia volubilis L.) seed oil was studied for physico - chemical characteristics and chemical composition. Through gas chromatography - flame ionization (GC - FID) process, the fatty acid composition in the oil was analyzed, revealing that the oil is rich in linoleic acid (42.62 %), linolenic acid (36.32 %) and oleic acid (11.64 %). The tocopherol level in the oil was also high (7.7 ? 0.005 mg/ Kg), revealed by high - performance liquid chromatography/ultraviolet - visible detector (HPLC/UV - VIS). The physico - chemical properties of the oil were also examined, including viscosity (88 - 92 cP), acid value (2.05 ? 0.005 mg KOH/g), saponification content (183.5 ? 1.45 mg KOH/g) and iodine value (192.4 ? 1.55 g I2/100 g). The results also indicated that sacha inchi is a health beneficial oil due to the high contents of essential fatty acids (? - 3, ? - 6 and ? - 9).
3 tables, 27 ref
NIZAMOV I S, TIMUSHEV I D, SALIKHOV R Z, NIZAMOV I D, NIKITIN Y N, SHULAEVA M P, POZDEEV O K, VOZNESENSKAYA T Y, BATYEVA E S, CHERKASOV R A
047662 NIZAMOV I S, TIMUSHEV I D, SALIKHOV R Z, NIZAMOV I D, NIKITIN Y N, SHULAEVA M P, POZDEEV O K, VOZNESENSKAYA T Y, BATYEVA E S, CHERKASOV R A (Kazan Scientific Center of Russian Academy of Sciences, Kazan, Russia, Email: isnizamov@mail.ru) : Pyridine alkaloid derivatives of dithiophosphoric acids and their antimicrobial evaluation. Asian J. Chem 2020, 32 (2), 329 - 34.
A new series of (S) - (?) - nicotinium salts of cyclic dithiophosphoric acids were synthesized by the reactions of 5,5 - dimethyl - 2 - mercapto2 - thiono - 1,3,2 - dioxaphosphorinane and 4 - methyl - 2 - mercapto - 2 - thiono - 1,3,2 - dioxaphosphorinane with (S) - (?) - nicotine. Picolinic and nicotinic acids and potassium pyridine - 3 - carboxylate reacted with O,O - diterpenyl dithiophosphoric acids on the basis of (1R) - endo - (+) - fenchyl alcohol and (S) - (?) - menthol to afford the corresponding 2 - carboxypyridinium, 3 - carboxypyridinium and potassium pyridinium3 - carboxylate dithiophosphates. The antibacterial and antifungal activity of (S) - (?) - nicotinium 4 - methyl - 2 - mercapto - 2 - thiono - 1,3,2 - dioxaphosphorinane and salts of O,O - diterpenyl dithiophosphoric acids on the basis of nicotine and nicotinamide were evaluated.
3 illus, 1 table, 27 ref
ANUJA K, REDDY K H, SRINIVASULU K, DHANALAKSHMI D
047661 ANUJA K, REDDY K H, SRINIVASULU K, DHANALAKSHMI D ( Chemistry Dep, Sri Krishnadevaraya Univ, Ananthapuramu - 515 003, Email: khussainreddy@yahoo.co.in) : Synthesis, structural characterization and DNA binding studies on transition metal complexes with 2 - formylpyridine benzoylhydrazone. Asian J. Chem 2020, 32 (2), 322 - 8.
The hydrazone ligand, 2 - formylpyridine benzoylhydrazone (FPBH) has been used to synthesize copper(II), nickel(II) and cobalt(II) complexes and characterized by elemental analyses, mass spectra, molar conductivity data IR, UV - visible spectroscopy. The complexes are found to have general formula M(FPBH)2 (where, M = Cu(II), Ni(II) and Co(II). Further the copper complex is investigated using ESR spectra. The spin Hamiltonian, orbital reduction and bonding parameters are calculated for the complex. The complex, Ni(FPBH)2 is structurally characterized based on single crystal X - ray crystallography. The complex crystallizes in monoclinic space group P21/c with a = 11.2632(2) ?, b = 8.8958(2) ?, c = 23.0834(5) ?, ? = 90?, ? = 90.858(2)?, ? = 90?, V = 2312.59(8) ?3 and Z = 4 with central Ni(II) ion in distorted octahedral structure coordinated by two tridentate FPBH ligand. The interactions of these complexes with calf thymus DNA have been investigated using absorption spectrophotometry. The copper complex binds more strongly than either nickel or cobalt complexes.
7 illus, 7 tables,51 ref
KAMBLE N R, PAWAR H R, KAMBLE V T
047660 KAMBLE N R, PAWAR H R, KAMBLE V T ( Chemistry Dep, PDEA?s Waghire Coll, Saswad - 412 301, Email: narendra1499@gmail.com) : NbCl5 and AgClO4 Promoted regio - selective acylation of indoles. Asian J. Chem 2020, 32 (2), 317 - 21.
In present study, an efficient and simple strategy towards chemo - selective and regio - selective acylation of indole using NbCl5 and AgClO4 catalyst are reported. This method utilizes the catalytic potentiality of NbCl5 and AgClO4 towards acylation of unprotected indoles in a synergistic manner. The combination of these catalytic system results into numerous advantages such as excellent yields of product, short reaction times and easier isolation of products.
2 tables, 31 ref
JOSE R L, GIGIMOL M G, MATHEW B
047659 JOSE R L, GIGIMOL M G, MATHEW B (Mahatma Gandhi Univ, Kottayam - 686 560, Kerala, Email: beenamathew@mgu.ac.in) : Adsorptive Removal of Anionic Azo Dye Acid Black 194 from Aqueous Solution using NNMBA - Crosslinked Poly N - Vinyl Pyrrolidone Hydrogel. Asian J. Chem 2020, 32 (2), 311 - 6.
N,N - Methylene bis - acrylamide crosslinked poly - N - vinyl pyrrolidone hydrogels were synthesized and binding of the hydrogel with the dye solution was followed spectrophotometrically. The chemical structure and morphology of the hydrogel before and after adsorption of acid black 194 was confirmed by FT - IR and SEM. Effect of various physico - chemical parameters such as concentration, temperature, pH, time and the amount of hydrogel used were investigated by batch adsorption studies. Hydrogel used as adsorbent in this study was characterized by UV - Vis spectrophotometer before and after adsorption of acid black 194. Kinetic studies suggested pseudo second order reaction. Langmuir and Freundlich isotherms were applied on equilibrium adsorption data and found that Freundlich isotherm fit better for the present investigation. N,N - methylene bisacrylamide crosslinked poly - N - vinyl pyrrolidone hydrogel displayed excellent properties for the removal of the azo dye, acid black 194 from aqueous solution.
9 illus, 2 tables, 24 ref
KASHYAP P, RANI M, TIWARI D P
047658 KASHYAP P, RANI M, TIWARI D P (Chemical Engineering Dep, Deenbandhu Chhotu Ram Univ of Science and Technology, Murthal - 131039, Email: manjubanwala@gmail.com) : Ultrasonic and Optical Studies of Binary Mixtures of Ethanol with Diisopropyl Ether, Cyclohexane or n - Alkanes (C6 - C9) from 298.15 to 318.15 K. Asian J. Chem 2020, 32 (2), 303 - 10.
Ultrasonic speeds (u) and refractive indices (n) of the binary liquid mixtures of ethanol with diisopropyl ether (DIPE) or cyclohexane or n - alkane (C6 - C9) were experimentally measured from 298.15 to 318.15 K over entire composition range. Using these measurements deviation in ultrasonic speed (?u), deviation in refractive index (?n), excess intermolecular free length (Lf E ) and excess isentropic compressibility (Ks E ) were calculated and fitted with Redlich - Kister equation. The ?u values are negative for all binary mixture and magnitude of negative deviation for binary mixture of ethanol and n - alkane decreases as chain length increases. At equimolar composition, Ks E follows the order: n - hexane > n - heptane > n - otcane > n - nonane > diisopropyl ether > cyclohexane. Experimental results were analyzed to understand the various molecular interactions present in the binary mixtures. The u values for all binary liquid solutions were also correlated using different empirical correlations such as Nomoto, impedence dependence relation and van Dael ideal mixing relation. The u for binary liquid mixtures were also computed theoretically using Schaaff?s collision factor theory. Free length theory was used to compute inter - molecular free length (Lf E ). Various correlations e.g., Arago - Biot (A - B), Gladstone - Dale (G - D), Heller (H), Lorentz - Lorentz (L - L), Eyring - John (E - J), Newton (Nw) and Weiner (W) were used for calculating refractive indices of selected systems theoretically.
4 illus, 6 tables, 36 ref
SAMANNAN B, SELVAM J, THAVASIKANI J
047657 SAMANNAN B, SELVAM J, THAVASIKANI J ( Chemistry Dep, Sacred Heart Coll, Tirupattur - 635 601, Email: jayabalandr@gmail.com) : Synthesis, characterization and anticancer activity of transition metal substituted polyoxometalate - ? - cyclodextrin composites. Asian J. Chem 2020, 32 (2), 297 - 302.
A novel hybrid composite, namely {[VIV+PMo11O40]?[? - CD]} which shows the high percent of apoptosis of MTT assay of A549 cell line (lung cancer) in different concentrations. The composite has been characterized using techniques such as FT - IR, EPR, SEM, EDS and X - ray diffraction. The anticancer (lung cancer A549 cell line) was investigated using direct microscopic observations for drug treated cell line and IC50 value of 1.93. The apoptosis of 45.37 % cell death in cell line of minimum concentration (3.12 ?g/mL) shows the good viability of ? - CD - POM against lung cancer A549 cell line.
4 illus, 4 tables, 28 ref
TRIPATHI V D
047656 TRIPATHI V D ( Chemistry Dep, Lalit Narayan Mithila Univ, Darbhanga - 846 003, Email: vishwadeepak66@gmail.com) : ? - Cyclodextrin mediated multicomponent synthesis of spiroindole derivatives in aqueous medium. Asian J. Chem 2020, 32 (2), 293 - 6.
An efficient ? - cyclodextrin catalyzed multicomponent synthetic protocol has been developed for the synthesis of spiro[indoline - 3,2' - quinazoline] - 2,4'(3?H) - dione from isatoic anhydride, isatin and primary amine in aqueous medium. This methodology offers a convenient method for the synthesis of spiroindole quinazolines in excellent yields. To extend synthetic utility of protocol some dihydro quinazolines have been also synthesized.
1 illus, 3 tables, 25 ref
SAMERJAI W, JITTANGPRASERT P, TONGRAUNG P
047655 SAMERJAI W, JITTANGPRASERT P, TONGRAUNG P ( Chemistry Dep, Srinakharinwirot Univ, Thailand, Email: pan15164649@gmail.com) : Colorimetric detection of iron(iii) ion based on 4 - aminothiophenol and schiff base naphthalene - 2 - ol modified silver nanoparticles. Asian J. Chem 2020, 32 (2), 287 - 92.
A facile, highly selective colorimetric sensor based on 4 - aminothiophenol (4 - ATP) and Schiff base naphthalene - 2 - ol (L) modified silver nanoparticles (4 - ATP - L - AgNPs) for detection of Fe(III) ion in aqueous solution. The presence of Fe(III) ion induced the aggregation of AgNPs that caused the red - shift from 430 to 440 nm, through a cooperative metal - ligand interaction from the coordination bond between Fe(III) ion and functional groups on AgNPs surface resulting in a colour change from dark brown to dark yellow with increasing absorption at 365 nm. The absorbance at 365 nm is linear with the concentration of Fe(III) ion ranging from 9.0 ? 10 - 6 M to 9.0 ? 10 - 3 M with a correlation coefficient of 0.9991. The detection limit of the developed method was 7.9 ? 10 - 6 M. The practical application of 4 - ATP - LAgNPs for selective sensor for Fe(III) ion in various drinking water samples were demonstrated.
6 illus, 3 tables, 27 ref
SULTHANA M T, CHITRA K, ALAGARSAMY V
047654 SULTHANA M T, CHITRA K, ALAGARSAMY V (MNR Coll of Pharmacy, Sangareddy - 502 294, Email: drvalagarsamy@gmail.com) : Anti - HIV, Antitubercular and Antibacterial Activities of Novel 3 - (Substituted Quinazolinylamino) - 2 - phenyl quinazolin - 4(3H)ones. Asian J. Chem 2020, 32 (2), 281 - 6.
In the present study, we have synthesized a series of novel 2 - phenyl - 3 - (substituted quinazolinylamino)quinazolin - 4(3H) - ones by the reaction of 3 - (substituted) - 2 - hydrazinoquinazoline - 4(3H) - ones with 2 - phenyl - 3,1 - benzoxazin - 4 - one. The starting material 3 - (substituted) - 2 - hydrazino - quinazolin - 4(3H) - ones were synthesized from various primary amines. All the synthesized compounds were screened for their antitubercular, anti - HIV and antibacterial activity against different Gram - positive and Gram - negative strains by agar dilution method. Among the test compounds, 3 - (4 - nitrophenyl) - 2 - (4 - oxo - 2 - phenylquinazolin - 3(4H) - ylamino)quinazolin - 4(3H) - one (BQZ6) and 3 - (4 - chlorophenyl) - 2 - (4 - oxo - 2 - phenylquinazolin - 3(4H) - ylamino)quinazolin - 4(3H) - one (BQZ7) shown most potent antibacterial activity against E. coli, P. aeruginosa and S. aureus with the MIC of 3 ?g/mL. The compound BQZ7 exhibited the antitubercular activity with the MIC of 25 ?g/mL and anti - HIV activity with the MIC of 35.4 ?g/mL against HIV1 and HIV2 and offers potential lead for further optimization and development to new antitubercular and anti - HIV agents. The results from this study confirm that the synthesized and biologically evaluated quinazolines showed promising antimicrobial, antitubercular and anti - HIV activities and are new scaffolds for antimicrobial activity.
1 table, 21 ref
ASHOKKUMAR D, GOPALAKRISHNAN M, RAMALINGAM G
047653 ASHOKKUMAR D, GOPALAKRISHNAN M, RAMALINGAM G ( Chemistry Dep, Annamalai Univ, Annamalai Nagar - 608 002, Email: drgr_dde@rediffmail.com ) : Synthesis and antimicrobial activity of some novel 1,4 - dihydropyridine trimer derivatives. Asian J. Chem 2020, 32 (2), 276 - 80.
An efficient multi - component one pot synthesis of some novel bioactive 1,4 - dihydropyridine derivatives from melamine using various aldehydes and 1,3 - dicarbonyl compounds are reported. This reaction carried out microwave irradiation under solvent free condition using low cost and efficient acetic acid catalyst. The excellent futures of this method are eco - friendly, short reaction time and mild reaction condition. This method is convincing route for highly substituted dihydropyridine trimer synthesis. The synthesized dihydropyridine derivatives are screened for antimicrobial properties.
2 tables, 40 ref
CHANDRA C, KHAN F, AGRAWAL S, SONI V K
047652 CHANDRA C, KHAN F, AGRAWAL S, SONI V K ( Chemistry Dep, National Institute of Technology, Raipur - 492 010, Email: fkhan.chy@nitrr.ac.in) : Removal of uranium(Vi) from aqueous solution by iron nanoparticles synthesized from testa extract of annacardium occidentale: A fluorimetric study. Asian J. Chem 2020, 32 (2), 271 - 5.
Uranium(VI) is one of the most harmful and carcinogenic ion if present in water above its permissible limit. The main objective of this study is removal of uranium(VI) from water sample using nano zerovalent iron prepared by green synthesis approach with the help of Annacardium occidentale testa extract in which the whole process is completely environmental friendly and cost effective and does not involve any hazardous chemicals. Size of AO - Fe nanoparticle is characterized through UV - visible spectroscopy and FTIR analysis. Morphology of nanoparticle is studied using SEM - EDS and XRD analysis. The adsorption capacity of AO - Fe nanoparticle is studied using batch experiments. Effect of different parameters are then analyzed such as pH, adsorbent dosage, contact time and U(VI) ion concentration. Adsorption isotherm is also studied using Langmuir and Freundlich adsorption isotherm where correlation constant R2 is about 0.99.
5 illus, 1 table, 26 ref
SUGANTHI R, PADMAJA S, MARY S J
047651 SUGANTHI R, PADMAJA S, MARY S J ( Chemistry Dep, Auxilium Coll, Vellore - 632 006, Email: jhancy2011@gmail.com) : Magnetic, thermal and electrical transport properties of o - substituted polyanilines encapsulated with Fe2O3 Nanoparticles. Asian J. Chem 2020, 32 (2), 265 - 70.
Poly(2 - nitroaniline), poly(2 - nitroaniline) - Fe2O3 and poly(2 - methylaniline) - Fe2O3 nanocomposites synthesized by in situ chemical oxidative polymerization technique were characterized by XRD, thermal (TGA and DTA) and FTIR & UV - visible spectroscopic techniques. The thermal stability was confirmed by the integral procedural decomposition temperature (IPDT) and oxidation index (OI) calculations. The electrical conductivity and dielectric properties were also investigated. At low frequency region, the dielectric constant decreases with increase in frequency due to electrical relaxation process. At high frequencies, dielectric constant is independent of frequency. At low frequency, there was strong frequency dispersion of permittivity and above 3 Hz, a frequency independent behaviour in permittivity was observed. The materials exhibit ferromagnetic behaviour.
9 illus, 3 tables, 31 ref
JAYAPRAKASH M S, SHIVAKUMAR K, SHASHIDHAR, VISHNUVARDHAN T K
047650 JAYAPRAKASH M S, SHIVAKUMAR K, SHASHIDHAR, VISHNUVARDHAN T K (Chemistry Dep, S.D.M. College of Engineering and Technology, Dharwad - 580 002, Email: shashidhar66111@gmail.com) : Viscosity, miscibility studies and mechanical properties of pullulan/poly(vinyl alcohol) blends at 30 ?C and 40 ?C. Asian J. Chem 2020, 32 (2), 260 - 4.
The miscibility studies of pullulan and poly(vinyl alcohol) (PVA) blends by reduced viscosity measurements, refractometry, mechanical properties and SEM analysis. Viscometric measurements at 30 and 40 ?C were taken using Ubbelohde viscometer. Ultrasonic interferometric was used to measure the ultrasonic velocities of different blend compositions. Refractive indices of blend solutions with different compositions were measured directly with an Abbe?s refractometer with thermostat containing water circulated at 30 and 40 ?C. The mechanical properties, refractive index, ultrasonic velocity and density studies showed that there is an increase of all these with PVA content in the blends. But SEM studies have given an indication of immiscibility in the blend system. Overall, pullulan/PVA blends have shown good physical and mechanical properties particularly for 90/10 composition.
7 illus, 4 tables, 26 ref
THUY N V, TIEN N M, QUY N N, LAM T D, LINH H T K, TRIEU L H, MINH L V, QUAN P M, BUI L M, TRUC T T @all
047649 THUY N V, TIEN N M, QUY N N, LAM T D, LINH H T K, TRIEU L H, MINH L V, QUAN P M, BUI L M, TRUC T T @all (Food Technology Dep, Can Tho Univ, Vietnam, Email: blminh@ntt.edu.vn, nvmuoi@ctu.edu.vn) : Evaluation of phytochemical and antioxidant activity of gomphrena celosioides mart. grown in tien giang province, Vietnam. Asian J. Chem 2020, 32 (2), 255 - 9.
Gomphrena celosioides Mart. is well known for its medicinal values worldwide. In this study, three extracts, viz. diethyl ether extract (DEE), ethanolic extract (EE) and aqueous extract (AE), were successively obtained from the leaves and stem of Gomphrena celosioides to determine the polyphenol and flavonoid content in this plant. A wide variety of pharmacologically active compounds such as alkaloid, flavonoid, terpenoid, saponin, tannin and polyphenol compounds were present in Gomphrena celosioides. The results of quantitative determination showed that total polyphenol content of DEE, EE and AE reached 35.35 ? 1.47, 250.17 ? 2.95 and 133.92 ? 3.17 mgGAE/ g, respectively. Moreover, total flavonoid content of the DEE, EE and AE was 23.21 ? 1.87, 50.74 ? 2.32 and 27.25 ? 1.34 mgQE/g, respectively.In comparison with DEE and AE, the ethanolic extract exhibited the highest DPPH (IC50 = 13.29 ? 0.10 ?g/mL) and ABTS (IC50 = 6.3 ? 0.11 ?g/mL).
4 illus, 2 tables, 30 ref
YADAV R N, BANIK I, SRIVASTAVA A K, RAMOS K,BANIK B K
047648 YADAV R N, BANIK I, SRIVASTAVA A K, RAMOS K,BANIK B K (Chemistry Dep, Univ of Texas - Pan American, Edinburg, TX 78539, U.S.A, Email: bimalbanik10@gmail.com, bbanik@pmu.edu.sa ) : Microwave - induced montmorillonite - mediated facile synthesis of enamines. Asian J. Chem 2020, 32 (2), 249 - 54.
Montmorillonite clay - mediated simple and high yielding protocol for the synthesis of various enamines with secondary amines and ketones is developed under microwave condition. This protocol is very convenient to accesses the enamines from cyclic amines with various carbonyl compounds in high yield under mild reaction conditions with short reaction time.
3 table, 18 ref