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Fluorescence emission enhancement in substituted 3-styrylindoles in the solid state

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Title Fluorescence emission enhancement in substituted 3-styrylindoles in the solid state
 
Creator ASEFA, A
SINGH, AK
 
Subject aggregation-induced emission
charge-transfer states
cis double-bonds
supramolecular interactions
organic nanoparticles
crystalline stilbene
excimer emission
single-bond
luminescence
vinylene)
3-styrylindoles
fluorescence
solid state
aggregate
 
Description Fluorescence emission properties of substituted 3-styrylindoles viz 3-(2-phenylethenyl-E)-NH-indole (1), 3-[2-(4-cyanophenyl)ethenyl-E]-NH-indole (2), and 3-(2-cyano-2-phenylethenyl-Z]-NH-indole (3) in n-hexane, THF-H(2)O binary mixtures and solid state are reported. In general, fluorescence efficiency in solid state is found to be much higher than in n-hexane solution. The fluorescence enhancement in solid state is attributed to restricted intramolecular motions. Interestingly, the molecules of 3 in solid state are also bound together through intermolecular hydrogen bonds yielding polymer like structure, leading to further enhancement of fluorescence emission. In THF-H(2)O binary mixtures, drastic enhancement of fluorescence efficiency is observed due to aggregate formation. (C) 2009
 
Publisher ELSEVIER SCIENCE BV
 
Date 2011-07-25T02:40:22Z
2011-12-26T12:49:25Z
2011-12-27T05:46:33Z
2011-07-25T02:40:22Z
2011-12-26T12:49:25Z
2011-12-27T05:46:33Z
2010
 
Type Article
 
Identifier JOURNAL OF LUMINESCENCE, 130(1), 24-28
0022-2313
http://dx.doi.org/10.1016/j.jlumin.2009.07.016
http://dspace.library.iitb.ac.in/xmlui/handle/10054/6613
http://hdl.handle.net/10054/6613
 
Language en