Role of solvent polarity on the fluorescence quenching of newly synthesized 7,8-benzo-4-azidomethyl coumarin by aniline in benzene-acetonitrile mixtures

被引：68

作者：

Melavanki, R. M. ^{[1
]}

Kusanur, R. A. ^{[2
]}

Kulakarni, M. V. ^{[2
]}

Kadadevarmath, J. S. ^{[1
]}

机构：

[1] Karnatak Univ, Dept Phys, Dharwad 580003, Karnataka, India

[2] Karnatak Univ, Dept Chem, Dharwad 580003, Karnataka, India

来源：

JOURNAL OF LUMINESCENCE | 2008年 / 128卷 / 04期

关键词：

7,8-benzo-4-azidomethyl coumarin; fluorescence quenching; diffusion-limited; static and dynamic quenching; finite sink approximation model;

D O I：

10.1016/j.jlumin.2007.08.013

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The fluorescence quenching of 7,8-benzo-4-azidomethyl coumarin by aniline has been studied in different solvent mixtures of benzene (BN) and acetonitrile (AN) at room temperature. The quenching is found to be appreciable and a positive deviation from linearity was observed in the Stern-Volmer (S-V) plot in all the solvent mixtures. Various parameters for the quenching process have been determined by sphere of action static quenching model and finite sink approximation model. The magnitudes of these rate parameters indicate that positive deviation in the S-V plot is both due to static and dynamic processes. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：573 / 577

页数：5

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