Intramolecular charge transfer and solvation dynamics of Nile Red in the nanocavity of cyclodextrins

被引：65

作者：

Hazra, P ^{[1
]}

Chakrabarty, D ^{[1
]}

Chakraborty, A ^{[1
]}

Sarkar, N ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Chem, Kharagpur 721302, W Bengal, India

来源：

CHEMICAL PHYSICS LETTERS | 2004年 / 388卷 / 1-3期

关键词：

D O I：

10.1016/j.cplett.2004.02.078

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The relative retardation of non-radiative rate and solvation dynamics of Nile Red (NR) in the nanocavity of cyclodextrins (CDs) (beta-cyclodextrin, beta-CD and gamma-cyclodextrin, gamma-CD) have been investigated by steady state and time resolved fluorescence spectroscopy. The non-radiative rate for twisted intramolecular charge transfer process is (TICT) retarded almost 2.5 times in presence of beta-CD whereas in presence of gamma-CD a little retardation of non-radiative rate compared to pure water is observed. We have observed time-dependent Stokes' shift of NR in aqueous solution of beta-CD but the same is not observed in case Of gamma-CD. The different feature of TICT and solvation of NR in two CDs (beta-CD and gamma-CD) arises due to the different types of complexation of NR with beta-CD and gamma-CD. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：150 / 157

页数：8

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