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In Situ Attenuated Total Reflection FTIR Spectroelectrochemistry Of Polybenzimidazobenzophenanthroline (BBL)

Published online by Cambridge University Press:  21 March 2011

Teketel Yohannes ,
H. Neugebauer ,
Niyazi S. Sariciftci ,
S. Yi  and
Samson A. Jenekhe
Teketel Yohannes
Affiliation:
Physical Chemistry, Johannes Kepler University Linz, Altenbergestraße 69, A-4040 Linz, Austria
H. Neugebauer
Affiliation:
Physical Chemistry, Johannes Kepler University Linz, Altenbergestraße 69, A-4040 Linz, Austria
Niyazi S. Sariciftci
Affiliation:
Physical Chemistry, Johannes Kepler University Linz, Altenbergestraße 69, A-4040 Linz, Austria
S. Yi
Affiliation:
Department of Chemical Engineering, University of Rochester, Rochester, NY 14627-0166, USA
Samson A. Jenekhe
Affiliation:
Department of Chemical Engineering, University of Rochester, Rochester, NY 14627-0166, USA
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Abstract

Fourier transform infrared (FTIR) spectroscopy is a powerful method to determine the doping induced structural changes and electronic band structure modifications of conjugated polymer films. Here, we report in situ attenuated total reflection (ATR) FTIR spectroelectrochemical results of reduction reactions (n-doping) of the conjugated ladder polymer polybenzimidazophenanthroline, BBL. The ATR-FTIR spectra are recorded in situ during continuous potential cycling of a BBL coated germanium reflection element in a three electrode spectroelectrochemical cell. The spectra and the structural changes during the reduction (n-doping) of the polymer film at different electrode potentials are presented. In contrast to most of the other conjugated polymers, this polymer shows four reversible redox reactions during n-doping, corresponding to various forms of BBL with different conductivities.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 598: Symposium BB – Electrical, Optical, & Magenetic Properties...V , 1999 , BB3.75
Copyright
Copyright © Materials Research Society 1999

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