Search

Your search keyword '"David Singh"' showing total 4 results
Start Over Author "David Singh" Journal spectrochimica acta part a: molecular and biomolecular spectroscopy
4 results on '"David Singh"'

4. Comparison of energy interaction parameters for the complexation of Pr(III) with glutathione reduced (GSH) in absence and presence of Zn(II) in aqueous and aquated organic solvents using 4f–4f transition spectra as PROBE

Author

Th. David Singh, Ch. Sumitra, N. Rajmuhon Singh, M. Indira Devi, H. Debecca Devi, and N. Yaiphaba

Subjects
chemistry.chemical_classification, Oxadiazoles, Nephelauxetic effect, Binding Sites, Hard metal, Aqueous solution, Absorption spectroscopy, Chemistry, Metal ions in aqueous solution, Inorganic chemistry, Glutathione, Atomic and Molecular Physics, and Optics, Analytical Chemistry, Ion, Coordination complex, Zinc, Energy Transfer, Spectrophotometry, Solvents, Praseodymium, Absorption (chemistry), Instrumentation, Spectroscopy
Abstract

The coordination chemistry of glutathione reduced (GSH) is of great importance as it acts as excellent model system for the binding of metal ions. The GSH complexation with metal ions is involved in the toxicology of different metal ions. Its coordination behaviour for soft metal ions and hard metal ions is found different because of the structure of GSH and its different potential binding sites. In our work we have studied two chemically dissimilar metal ions viz. Pr(III), which prefer hard donor site like carboxylic groups and Zn(II) the soft metal ion which prefer peptide-NH and sulphydryl groups. The absorption difference and comparative absorption spectroscopy involving 4f-4f transitions of the heterobimetallic Complexation of GSH with Pr(III) and Zn(II) has been explored in aqueous and aquated organic solvents. The variation in the energy parameters like Slater-Condon (F(K)), Racah (E(K)) and Lande (xi(4f)), Nephelauxetic parameter (beta) and bonding parameter (b(1/2)) are computed to explain the nature of complexation.

Published
2005

Catalog

Books, media, physical & digital resources
See catalog results