Record Details

Fluorescence monitoring of pH dependent complexation of chlorin p6 with surfactants

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Fluorescence monitoring of pH dependent complexation of chlorin p6 with surfactants
 
Creator MISHRA, PADMAJA P
BHATNAGAR, JAYA
DATTA, ANINDYA
 
Subject organic compounds
surfactants
radiative lifetimes
fluorescence
 
Description We have observed the pH-dependent formation of electrostatic complexes of chlorin p6 with surfactants in submicellar concentrations. Successive protonation of the ionizable groups cause a progressively increasing positive charge on the fluorophore as the pH decreases. Complexes are formed with the cationic CTAB at pH 7 and 5 and with the anionic SDS at pH 3, as manifested in a decrease in fluorescence quantum yield and radiative lifetime at low surfactant concentrations. The fluorescence quantum yield and lifetime are observed to increase beyond certain concentrations of the surfactants and saturate before the critical micellar concentrations are reached. The variation in the fluorescence parameters is rationalized by a competitive model involving pH-induced and surfactant-induced aggregates.
 
Publisher Elsevier
 
Date 2009-02-27T11:07:06Z
2011-11-25T18:00:34Z
2011-12-26T13:06:45Z
2011-12-27T05:54:45Z
2009-02-27T11:07:06Z
2011-11-25T18:00:34Z
2011-12-26T13:06:45Z
2011-12-27T05:54:45Z
2004
 
Type Article
 
Identifier Chemical Physics Letters 386(1-3), 158-161
0009-2614
http://dx.doi.org/10.1016/j.cplett.2004.01.057
http://hdl.handle.net/10054/799
http://dspace.library.iitb.ac.in/xmlui/handle/10054/799
 
Language en