A5025583339- Metal complexes synthesis and properties
- Electrochemical Analysis and Applications
- Inorganic and Organometallic Chemistry
- Molecular Sensors and Ion Detection
- Synthesis and Characterization of Heterocyclic Compounds
- Nanoparticles: synthesis and applications
- Chemical Reaction Mechanisms
- Analytical chemistry methods development
- Advanced oxidation water treatment
- Surfactants and Colloidal Systems
- Thermal and Kinetic Analysis
- Magnetism in coordination complexes
- Analytical Chemistry and Sensors
- Gold and Silver Nanoparticles Synthesis and Applications
- DNA and Nucleic Acid Chemistry
- Nanomaterials for catalytic reactions
- Chemical Synthesis and Reactions
- Electrochemical sensors and biosensors
- Sulfur Compounds in Biology
- Gas Sensing Nanomaterials and Sensors
- Copper-based nanomaterials and applications
- Chemical and Physical Properties in Aqueous Solutions
- Adsorption and biosorption for pollutant removal
- Water Quality Monitoring and Analysis
- Synthesis and Biological Evaluation
University of Lucknow
2013-2024
University of the South Pacific
2012
Manipur University
1990-1991
Indian Institute of Technology Kanpur
1985-1989
Central Salt and Marine Chemicals Research Institute
1989
Shanghai Institute for Science of Science
1953
The complex process of nanoparticle formation in an aqueous solution is governed by kinetics and thermodynamic factors. This paper describes a room-temperature growth kinetic study evaluation activation parameters monodispersed silver nanoparticles (AgNPs) synthesized alkaline medium chemical reduction method using AgNO3 as source Ag+ ions tannic acid (TA) reductant (reducing agent) well capping or stabilizing agent the absence any other external stabilizer. A simple conveniently handled...
Here, in the present study, silver nanoparticles (SNPs) size range 6-10 nm have been synthesized by a chemical reduction method using nicotinamide (NTA), an anti-inflammatory agent, and cetyltrimethylammonium bromide (CTAB), good stabilizing to preparing range. Kinetic studies on formation of SNPs performed spectrophotometrically at 410 (strong plasmon band) aqueous medium as function [AgNO3], [NTA], [NaOH], [CTAB]. The plot ln(A∞ - At ) versus time exhibited straight line pseudo-first-order...
For the very first time, a detailed kinetic study for preparation of silver nanoparticles (silver NPs) by neuroleptic agent gabapentin (GBP) in absence stabilizer has been reported this investigation. This paper is devoted to chemical reduction method which acts as both reductant and stabilizer, AgNO3 used source Ag+ ions NaOH maintaining alkaline medium. A UV-visible spectrophotometer monitor progress reaction kinetics an aqueous medium changing concentration different variables such AgNO3,...
The kinetic investigation of Ru(III) promoted oxidation L-tryptophan (Trp) by [Fe(CN)6]3- has been performed in anionic sodium dodecyl sulfate (SDS) micellar medium recording the decrease absorbance at 420 nm, corresponding to using UV-visible spectrophotometer. Pseudo-first-order condition used examine progress reaction as a function [Fe(CN)63−], ionic strength, [OH-], [SDS], [Ru3+], [Trp], and temperature changing one variable time. results exhibit that [Trp] are decisive parameter showing...
The catalytic effect of ruthenium chloride on the outer sphere electron transfer hexacyanoferrate(II) by periodate ion in aqueous alkaline medium has been effectively employed to determine ruthenium(III) at micro level.The optimum reaction condition established and fixed time procedure is adopted.A linear relationship between changes absorbance added Ru(III) concentration utilized for trace level determination Ru(III).The results reveal that addition interfering ions (up 71 times higher Ru)...
In the present work, iron nanoparticles were synthesized in α-Fe2O3 phase with reduction of potassium hexachloroferrate(III) by using l-ascorbic acid as a reducing agent presence an amphiphilic non-ionic polyethylene glycol surfactant aqueous solution. The NPs characterized powder X-ray diffraction, field emission scanning electron microscopy, transmission atomic force dynamic light scattering, energy dispersive spectroscopy, Fourier transform infrared and ultraviolet-visible...
Substitution of coordinated water molecule from the coordination sphere [Ru(CN)5H2O]3− with nitrogen donor ligand 4,4′Bipyridine (BipY) was studied in anionic micellar medium under pseudo first order condition as a function ionic strength, pH, reactants concentration and temperature at 390 nm λmax orange colored product [Ru(CN)4BipY]2−. The reaction independent while it exhibited kinetics [BipY] selected range. variation strength had negative effect on substitution rate. surfactant SDS has...
Over the past few years, environmental concerns regarding dye contamination have grown. Removing from wastewater industry is crucial for sustainability. The removal of Acid Red 13 (AR13) was achieved through its oxidative degradation utilizing peroxydisulfate. While there are reports on Fe2+-mediated oxidation azo dyes by peroxydisulfate, further investigation needed to understand effect surfactants their degradation. present study focuses investigating influence cationic, anionic, and...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFormylation of Benzopyrones. I. Formylation Hydroxycoumarins with Hexamethylenetetramine1R. M. NAIKR. NAIKMore by R. NAIK and V. THAKORV. THAKORMore THAKORCite this: J. Org. Chem. 1957, 22, 12, 1626–1629Publication Date (Print):December 1, 1957Publication History Published online1 May 2002Published inissue 1 December 1957https://doi.org/10.1021/jo01363a024RIGHTS & PERMISSIONSArticle Views629Altmetric-Citations13LEARN ABOUT THESE METRICSArticle...
Abstract The kinetic investigation of Ru(III) promoted oxidation L-phenylalanine (L-PheAla) by [Fe(CN) 6 ] 3− has been performed in anionic sodium dodecyl sulfate (SDS) micellar medium recording the decrease absorbance at 420 nm corresponding to using an UV–visible spectrophotometer. Using pseudo-first-order condition, course reaction was studied as a function ], ionic strength, [OH − [SDS], [Ru 3+ [L-PheAla] and temperature changing one variable time. results exhibit that are crucial...