Polymer microenvironmental effects on the photophysics of cinchonine dication

被引：7

作者：

Joshi, Neeraj Kumar ^{[1
]}

Rautela, Ranjana ^{[1
]}

Pant, Sanjay ^{[1
]}

Mishra, Hirdyesh ^{[2
]}

机构：

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

[2] MMV Banaras Hindu Univ, Dept Phys, Varanasi, Uttar Pradesh, India

来源：

JOURNAL OF LUMINESCENCE | 2010年 / 130卷 / 11期

关键词：

Cinchonine dication (C++); Edge excitation red shift (EERS); Polymer microenvironment; EXCITATION RED-SHIFT; ENERGY MIGRATION; QUININE; FLUORESCENCE; QUINIDINE; STATE;

D O I：

10.1016/j.jlumin.2010.05.016

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Photophysical properties of cinchonine dication (C++) have been studied in protic and aprotic polymers by monitoring steady state and time resolved measurements. It is found to be sensitive towards the microenvironment of polymers. Edge excitation red shifted emission (EERS) is observed in all polymeric matrices. However, the magnitude of EERS is relatively high in protic as compared to aprotic polymer. Isobestic point in excitation spectra and three decay components in time resolved measurements indicate more than two trapped chemical species in the heterogeneous environment of the polymer. Solute-polymer interactions are found to produce the third decay channel, unlike in solution phase and may be useful to understand the polymer microenvironment. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1994 / 1998

页数：5

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