A5102770918- Radioactive element chemistry and processing
- Electrochemical Analysis and Applications
- Extraction and Separation Processes
- Ionic liquids properties and applications
- Analytical chemistry methods development
- Chemical Synthesis and Characterization
- Analytical Chemistry and Sensors
- Molten salt chemistry and electrochemical processes
- Lanthanide and Transition Metal Complexes
- Metal complexes synthesis and properties
- Metal Extraction and Bioleaching
- Radioactive contamination and transfer
- Organometallic Compounds Synthesis and Characterization
- Chemical and Physical Properties in Aqueous Solutions
- Inorganic and Organometallic Chemistry
- Nuclear reactor physics and engineering
- Molecular Sensors and Ion Detection
- Atomic and Subatomic Physics Research
- Environmental Chemistry and Analysis
- Chemical Reaction Mechanisms
- Nuclear materials and radiation effects
- Graphite, nuclear technology, radiation studies
- Synthesis and Characterization of Heterocyclic Compounds
- Ophthalmology and Visual Health Research
- DNA and Nucleic Acid Chemistry
Bhabha Atomic Research Centre
2016-2025
Homi Bhabha National Institute
2018-2024
Rani Durgavati University
2007
Banaras Hindu University
1985
A multitechnique approach with theoretical insights has been employed to understand the complexation of trivalent lanthanides two β-diketones, viz. 1-phenyl-1,3-butanedione (L1) and 4,4,4-trifluoro-1-phenyl-1,3-butanedione (L2), in an ionic liquid (C6mim·NTf2). UV–vis spectral analysis using Nd3+ revealed predominance ML2+ ML4– species. The stability constants for PB complexes were higher (β2 ∼ 10.45 ± 0.05, β4 15.51 0.05) than those TPB 7.56 13.19 0.06). photoluminescence titration Eu3+...
A quantitative, rapid, endothermic dissolution of U3O8 in C4mim·PF6 (1-alkyl-3-methyl imidazolium hexafluorophosphate) has been achieved within 2 h at 65 °C by situ generated fluoride ions pre-equilibrating the ionic liquid with suitable concentrations nitric acid. The efficiency followed trend: UO3 > UO2 U3O8. generation was found to increase concentration acid being equilibrated, water content liquid, and also time equilibration. rate C4mim·PF6> C6mim·PF6 C8mim·PF6. maximum loading...
Complexation of NpO2+ with tetramethyl diglycolamide (TMDGA) was investigated in an ionic liquid (IL: 1-butyl-3-methylimidazolium bis(trifluoromethane sulfonyl)imide, Bumim.Tf2N) objective to understand its complexation behaviour and optical properies...
The +5 state is an unusual oxidation of uranium due to its instability in the aqueous phase. However, it redox stable with PCs.
This investigation reports the extraction of UO 2 Cl 4 2− and MoO 2+ via neutral (R N) cationic (Ph) + complexes (following ‘solvation’ ‘cation exchange’ mechanisms), using a task-specific ionic liquid (TSIL).
Research, based on the development of an economical innovative green technology, is quintessential requirement for advancement nuclear fuel cycle (NFC). The present studies show that Maline, with a preorganized supramolecular scaffold, would be considered as workhorse its potential efficacy in diverse facets NFC, specifically elegant metal hijacker processing uranium (U) matrices, designer solvent analysis U, and promising U chelator greener alternative cleanup contamination. Seven matrices...
Carbon and phosphorous are two primary elements common to the bio-geosphere omnipresent in both biotic abiotic arenas. Phosphonate carboxylate considered as building blocks of glyphosate humic substances constituents cellular wall bacteria driving functionalities for most chemical interactions involving these elements. Phosphonocarboxylates, a combination one moiety, ideal models dig deep into understanding functional groups with metal ions. Phosphorous carbon majorly exist inorganic/organic...
The present work envisages a chelation driven, facile, selective, and rapid method for uranium(VI) separation from (U, Th) mixture using 1-hydroxy-2-pyridone (1,2-HOPO). Herein, U(VI) was selectively precipitated as the neutral [UO
Abstract Studies on complexation of uranium with organophosphorous ligands in aquatic systems are important from point view mobility environment. In the present paper, we report results U(VI) by a model ligand for organophosphorus functionalities humic substances (HS), that is, phenylphosphonic acid (PPA), using electro analytical techniques. The UO 2 2+ has been found to form 1:1 and 1:2 complexes mono-protonated PPA (HPhPO 3 − ) complex non-protonated PPA, (PhPO 2− , latter (UO PhPO...
The determination of organotrithiocarbonates with o-diacetoxyiodobenzoate and N-chlorosuccinimide in aqueous non-aqueous media using visual potentiometric methods is described. end-point indicated by a sharp colour change from straw yellow to deep caused the first drop oxidant solution excess. Potentiometric titrations were performed antimony or modified calomel reference electrodes bright platinum wire as indicator electrode. proposed method simple, rapid, requires minimum apparatus also...
Phosphonates and carboxylates are two primitive functional groups omnipresent in nature, they act as good chelators for metal ion binding. These always associated with dissociable protons their acidic forms. Thus, interactions protonation/deprotonation mechanisms. The present study was aimed at determining the thermodynamic parameters (log KP/pKa, ΔGP, ΔHP, ΔSP) protonation of three aliphatic phosphonocarboxylates, namely, phosphonoformic acid (PFA), phosphonoacetic (PAA), phosphonopropanoic...
Laboratory-scale studies were carried out to develop an analytical methodology for the processing of plutonium-bearing laboratory waste at liter scale using hollow fiber–supported liquid membrane (HFSLM) technique by selective recovery plutonium from uranium, americium, and other chemicals. In first stage, uranium selectively transported feed receiver phase 30% tri-n-butyl phosphate/n-dodecane which was used as carrier in HFSLM. From thus separated mixture, Pu(III) precipitated ammonium...