Record Details

Effect of microheterogeneous media on the fluorescence and fluorescence probe properties of donor-acceptor diarylbutadienes

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Effect of microheterogeneous media on the fluorescence and fluorescence probe properties of donor-acceptor diarylbutadienes
 
Creator SINGH, AK
KANVAH, S
 
Subject charge-transfer fluorescence
pi-star
photoisomerization
photophysics
singlet
energy
diphenylpolyenes
photochemistry
recognition
assemblies
 
Description Diarylbutadienes, namely 1-(para-cyanophenyl)-4-phenylbuta-1E,3E-diene (1), 1-(para-methoxyphenyl)-4-phenylbuta-1E,3E-diene (2), 1-(para-cyanophenyl)-4-(para-methoxyphenyl)-1E,3E-diene (3) have been prepared and investigated for their absorption and fluorescence properties in homogeneous media of organic solvents, dioxane-water binary mixtures and in the microheterogeneous media of sodium dodecyl sulfate, cetyl trimethyl ammonium bromide and Triton-X-100 micelles. The fluorescence behaviour in various media has been correlated in terms of empirical solvent parameters such as Dimroth E-T(30) and Kamlet-Taft pi* values, and Kirkwood functions. A Linear correlation between solvent polarity and fluorescence properties is observed. In ethanol-methanol (1:1, v/v) matrix at 77 K, a blue-shifted fluorescence maximum with enhanced fluorescence quantum yields is observed for dienes 2 and 3. The singlet excited state of diene 3 is found to be highly polar in nature. The fluorescence peak intensity of dienes 1 and 2 and the fluorescence emission wavelength maximum (lambda(f), max) of diene 3 undergo significant changes upon changing the concentration of surfactants. The fluorescence properties of these dienes have been further used to characterize the micelles in terms of their critical micelle concentration and micropolarity.
 
Publisher GAUTHIER-VILLARS/EDITIONS ELSEVIER
 
Date 2011-07-29T21:13:22Z
2011-12-26T12:52:38Z
2011-12-27T05:39:12Z
2011-07-29T21:13:22Z
2011-12-26T12:52:38Z
2011-12-27T05:39:12Z
2000
 
Type Article
 
Identifier NEW JOURNAL OF CHEMISTRY, 24(8), 639-646
1144-0546
http://dx.doi.org/10.1039/b000586j
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7836
http://hdl.handle.net/10054/7836
 
Language en