Fluorescence and topological gap of conjugated phenylene polymers

Soos, ZG and Etemad, S and Galvao, DS and Ramasesha, S (1992) Fluorescence and topological gap of conjugated phenylene polymers. In: Chemical Physics Letters, 194 (4-6). pp. 341-346.

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Abstract

We propose that strong fluorescence in conjugated polymers requires a dipole-allowed state to be the lowest singlet. Hückel theory for para-conjugated phenyl rings yields an extended, topologically one-dimensional ?-system with increased alternation, states localized on each ring, and charge-transfer excitations between them. Exact Pariser�Parr�Pople results and molecular spectra for oligomers support a topological contribution and a lowest dipole-allowed singlet in phenylene polymers.

Item Type:	Journal Article
Publication:	Chemical Physics Letters
Publisher:	Elsevier science
Additional Information:	Copyright of this article belongs to Elsevier science.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	05 Apr 2011 04:58
Last Modified:	21 Feb 2012 07:55
URI:	http://eprints.iisc.ac.in/id/eprint/36131

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