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Effects of Φ-Stacking on the Absorption and Emission of Light by Conjugated Polymers and Oligomers

Published online by Cambridge University Press:  21 March 2011

M. David Curtis ,
Amy Koren  and
Jeff W. Kampf
M. David Curtis
Affiliation:
Department of Chemistry, University of Michigan, Ann Arbor, MI 48109-1055
Amy Koren
Affiliation:
Department of Chemistry, University of Michigan, Ann Arbor, MI 48109-1055
Jeff W. Kampf
Affiliation:
Department of Chemistry, University of Michigan, Ann Arbor, MI 48109-1055
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Abstract

We have determined the crystal structures of regioregular HH-TT oligomers with a variety of side chains, including hydroxy-bearing side chains capable of H-bonding. The H-bonding orders the molecular packing into infinite 2-D sheets of Φ-stacks. In these H-bonded sheets, the Φ-stacks are insulated from each other by the aliphatic side chains and form one-dimensional “wires”. In contrast, the structures of similar oligomers that do not have H-bonded side-chains feature a structure in which neighboring Φ-stacks in are in contact (“shorted wires”). The effects of these differing molecular arrangements on the spectral properties and exciton splitting are discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 598: Symposium BB – Electrical, Optical, & Magenetic Properties...V , 1999 , BB10.8
Copyright
Copyright © Materials Research Society 1999

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