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Photoexcitations of Oligothiophenes with Reduced Conformational Mobility

Published online by Cambridge University Press:  10 February 2011

L. Rossi ,
G. Bongiovanni ,
C. Botta ,
G. Cerullo ,
G. Lanzani ,
A. Mura ,
F. Sannicolo ,
T. Benincori  and
R. Tubino
L. Rossi
Affiliation:
Istituto Nazionale per la Fisica della Materia (Italy). Dipartimento di Fisica “A. Volta,”Università di Pavia, Pavia (Italy).
G. Bongiovanni
Affiliation:
Istituto Nazionale per la Fisica della Materia (Italy). Dipartimento di Scienze Fisiche, Università di Cagliari, Cagliari (Italy).
C. Botta
Affiliation:
Istituto di Chimica delle Macromolecole, CNR, Milano (Italy).
G. Cerullo
Affiliation:
Istituto di Matematica e Fisica, Università di Sassari, Sassari (Italy).
G. Lanzani
Affiliation:
Istituto Nazionale per la Fisica della Materia (Italy). CEQSE-CNR Dipartimento di Fisica, Politecnico di Milano, Milano (Italy).
A. Mura
Affiliation:
Istituto Nazionale per la Fisica della Materia (Italy). Dipartimento di Scienze Fisiche, Università di Cagliari, Cagliari (Italy).
F. Sannicolo
Affiliation:
Dipartimento di Chimica Organica ed Industriale, Università di Milano, Milano (Italy).
T. Benincori
Affiliation:
Dipartimento di Chimica Organica ed Industriale, Università di Milano, Milano (Italy).
R. Tubino
Affiliation:
Istituto Nazionale per la Fisica della Materia (Italy). Dipartimento di Scienza dei Materiali, Università di Milano, Milano (Italy).
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Abstract

We present a comprehensive study of the optical and electronic properties of a series of oligothiophenes in which one or two inter-ring torsional angles have been blocked by chemical bridging. These give us the possibility to investigate the role of the conformational mobility and of the coupling with the inter-ring torsion on the deactivation process of the singlet excited states. We find that both the radiative and the non-radiative deactivation channels are affected by the inter-ring bridging.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 488: Symposium J – Electrical, Optical & Magnetic Properties of Organic IV , 1997 , 127
Copyright
Copyright © Materials Research Society 1998

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