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Faculty of Sciences
Document Details
Document Type
:
Article In Journal
Document Title
:
Molecular complexes of L-phenylalanine with substituted 1,4-benzoquinones in aqueous medium: Spectral and theoretical investigations
Molecular complexes of L-phenylalanine with substituted 1,4-benzoquinones in aqueous medium: Spectral and theoretical investigations
Document Language
:
English
Abstract
:
Various spectral techniques such as UV-Vis, FT-IR, and fluorescence have been employed to investigate the charge transfer interaction of L-phenylalanine (LPA) with substituted 1,4-benzoquinones (MQ(1-4)). Kinetic and thermodynamic properties of the complexes were determined in aqueous medium at physiological condition (pH = 7). The interaction of MQ(1-4) with L-phenylalanine (LPA) was found to proceed through the formation of donor-acceptor complex, yielding a radical anion. The stoichiometry of the complexes was determined by Jobs continuous variation method and was found to be 1:1 in all the cases. Fluorescence quenching studies showed that the interaction between the donor and the acceptors is spontaneous. The results indicated that the progressive replacement of chlorine atom (-I effect) by methoxy group (+M effect) in the quinone decreased the electron acceptor property of the quinone. The order of the experimentally measured association constant of these complexes was well supported by DFT/B3LYP calculations.
ISSN
:
1386-1425
Journal Name
:
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume
:
116
Issue Number
:
116
Publishing Year
:
1434 AH
2013 AD
Article Type
:
Article
Added Date
:
Monday, July 17, 2017
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
K Ganesh,
Ganesh,, K
Researcher
e El-Mossalamy
El-Mossalamy, e
Researcher
A Satheshkumar
Satheshkumar, A
Researcher
c Balraj
Balraj, c
Researcher
p Elango
Elango, p
Researcher
Files
File Name
Type
Description
42036.pdf
pdf
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