Issue 1, 2006
From the journal:

Journal of Materials Chemistry

Synthesis and properties of conjugated oligomers containing fluorene, fluorenone, thiophene and cyclopentadithiophenone units

Franklin Jaramillo-Isazaab  and  Michael L. Turner*a  

* Corresponding authors

a Organic Materials Innovation Centre, School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL
E-mail: michael.turner@manchester.ac.uk

b Corrosion Protection Group, University of Antioquia, P.O. Box 1226, Medellín, Colombia

Abstract

Conjugated oligomers based on fluorene, fluorenone and thiophene derivatives have been prepared by parallel synthesis using the Suzuki cross-coupling reaction. These oligomers can be used as models of the corresponding fluorene copolymers and their structures were correlated with the observed optical and electrochemical behaviour. The long wavelength absorption bands observed for oligomers that contain fluorenone or cyclopentadithiophene units were assigned to an allowed π–π* transition associated with the carbonyl containing monomer unit. In addition the photoluminescence efficiency and the concentration dependence of the long wavelength emission band (>525 nm) for these materials strongly suggests that it can be attributed to emission involving fluorenone-based excimers.

Graphical abstract: Synthesis and properties of conjugated oligomers containing fluorene, fluorenone, thiophene and cyclopentadithiophenone units

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Article information

DOI
https://doi.org/10.1039/B511349K
Article type
Paper
Submitted
09 Aug 2005
Accepted
15 Sep 2005
First published
05 Oct 2005

J. Mater. Chem., 2006,16, 83-89

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Synthesis and properties of conjugated oligomers containing fluorene, fluorenone, thiophene and cyclopentadithiophenone units

F. Jaramillo-Isaza and M. L. Turner, J. Mater. Chem., 2006, 16, 83 DOI: 10.1039/B511349K

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