Absorption and fluorescence spectral properties of donor-acceptor ethenes bearing indole and p-nitrophenyl substituents

Absorption and fluorescence spectral properties of donor-acceptor ethenes bearing indole and... Synthesis, absorption and fluorescence properties (λf, λex, Stokes shifts, Φf, τf, correlation plots of Δf and ET(30) with Φf and Stokes shifts, μf, low temperature fluorescence properties and excited state geometry) of 3-(4-nitrophenyl ethenyl-E)-NH-indole (1) and 3-(4-nitrophenyl ethenyl-E)-N-acetyl indole (2) are described. Occurrence of singlet excited state torsional motions and presence of more than one excited species, which are significantly influenced by the solvent polarity, have been observed. It is suggested that while 1 fluoresces predominantly from the conformationally relaxed intramolecular charge transfer (CRICT) state, 2 fluoresces from three different types of excited species, including the locally excited state, intramolecular charge transfer excited state and the CRICT state. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Absorption and fluorescence spectral properties of donor-acceptor ethenes bearing indole and p-nitrophenyl substituents

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Publisher
Springer Journals
Copyright
Copyright © 2005 by VSP
Subject
Chemistry; Inorganic Chemistry; Physical Chemistry; Catalysis
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1163/1568567053146832
Publisher site
See Article on Publisher Site

Abstract

Synthesis, absorption and fluorescence properties (λf, λex, Stokes shifts, Φf, τf, correlation plots of Δf and ET(30) with Φf and Stokes shifts, μf, low temperature fluorescence properties and excited state geometry) of 3-(4-nitrophenyl ethenyl-E)-NH-indole (1) and 3-(4-nitrophenyl ethenyl-E)-N-acetyl indole (2) are described. Occurrence of singlet excited state torsional motions and presence of more than one excited species, which are significantly influenced by the solvent polarity, have been observed. It is suggested that while 1 fluoresces predominantly from the conformationally relaxed intramolecular charge transfer (CRICT) state, 2 fluoresces from three different types of excited species, including the locally excited state, intramolecular charge transfer excited state and the CRICT state.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Jan 1, 2005

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