Polymer micro-environmental effects on the fluorescence characteristics of 5-aminoquinoline and 3-aminoquinoline

被引：8

作者：

Bridhkoti, J. P. ^{[2
]}

Joshi, H. C. ^{[1
]}

Pant, S. ^{[2
]}

机构：

[1] Inst Plasma Res, Gandhinagar, Gujarat, India

[2] Kumaun Univ Nainital, Photophys Lab, Dept Phys, Naini Tal, India

来源：

JOURNAL OF LUMINESCENCE | 2012年 / 132卷 / 03期

关键词：

3-Aminoquinoline; 5-Aminoquinoline; Polymer; Fluorescence; EXCITED-STATE DYNAMICS; PROTON-TRANSFER; PHOTOPHYSICAL PROPERTIES; DISSOCIATION-CONSTANTS; SOLVENT DEPENDENCE; AMINO GROUP; POLARITY; 6-HYDROXYQUINOLINE; SUBSTITUTION;

D O I：

10.1016/j.jlumin.2011.10.011

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper we report the spectral and decay behavior of two probes viz. 5-aminoquinoline (5AQ) and 3-aminoquinoline (3AQ) in three different polymeric systems viz. poly methyl methacrylate (PMMA), polyvinyl alcohol (PVA) and cellulose acetate (CA). Absorption spectra are nearly identical for all the polymers but the emission shows larger shift in case of CA as compared to PMMA and PVA. The behavior is explained on the basis of higher hydrogen bond donating ability in case of CA because of the presence of cellulosic hydrogens. Observed multiexponential decays are explained on the basis of free as well as hydrogen-bonded species and also trapping in various excited state geometries of the matrix. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：722 / 729

页数：8

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