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Photoinduced electron transfer between anionic fluorophores and methyl viologen in homogeneous and microheterogeneous media

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Title Photoinduced electron transfer between anionic fluorophores and methyl viologen in homogeneous and microheterogeneous media
 
Creator BURAI, TN
PANDA, D
IYER, ESS
DATTA, A
 
Subject PET
Chlorin P-6
Lucifer Yellow
Micelle
Ultrafast dynamics
AOT REVERSE MICELLES
EXCITED-STATE
CHLORIN P(6)
LUCIFER YELLOW
COUMARIN DYES
STEADY-STATE
FLUORESCENCE
DYNAMICS
DERIVATIVES
BINDING
 
Description The rate and extent of photoinduced electron transfer change significantly as a result of confinement in nanovolumes. Study of such processes is an active area of research in physical chemistry. The effect is most interesting when the molecules that participate in PET are charged. In the present article, the modulation of PET has been studied for two anionic fluorophores: Lucifer Yellow CH and chlorin p(6) with Methylviologen dication. PET, manifested in the quenching of fluorescence of the fluorophores, has been modulated by incorporating the molecules in organized assemblies like micelles, reverse micelles and supramolecular hosts. The dynamics of the process has been monitored in the femtosecond to nanosecond timescale. The modulation of the electron transfer has been found to be occurring mainly due to the disruption of contact ion pairs formed between the fluorophores and the quencher. (C) 2012 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2014-10-17T04:22:55Z
2014-10-17T04:22:55Z
2012
 
Type Article
 
Identifier JOURNAL OF LUMINESCENCE, 132(11)2929-2936
http://dx.doi.org/10.1016/j.jlumin.2012.05.001
http://dspace.library.iitb.ac.in/jspui/handle/100/15938
 
Language en