Excited state complex formation between methyl glyoxal and some aromatic bio-molecules: a fluorescence quenching study

被引：6

作者：

Banerjee, D ^{[1
]}

Mandal, A ^{[1
]}

Mukherjee, S ^{[1
]}

机构：

[1] Indian Assoc Cultivat Sci, Dept Phys Chem, Kolkata 700032, W Bengal, India

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2003年 / 59卷 / 01期

关键词：

luminol; amino acid; methyl glyoxal; complex formation;

D O I：

10.1016/S1386-1425(02)00125-7

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Fluorescence quenching of some important aromatic bio-molecules (ABM) such as 3-aminophthalhydrazide (luminol), tryptophan (Try), phenylalanine and tyrosine (Tyr) by methyl glyoxal (MG) has been studied employing different spectroscopic techniques. The interaction of MG with ABM in the excited state has been analysed using Stern-Volmer (S-V) mechanism.. In the case of MG-luminol system time correlated single photon counting (TCSPC) technique has also been applied to explain the S-V mechanism. The bimolecular rate constants obtained are found to be higher than the rate constant for diffusion controlled process. A plausible explanation of the quenching mechanism has been discussed on the basis of hydrogen bonding, charge transfer and energy transfer interaction between the colliding species. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：103 / 109

页数：7

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