Electrochemistry of Ring-Substituted Polyanilines: Effect of Substituents on Electronic Properties
Ray, A.; Chiang, J. C.; Macdiarmid, A. G.; Wei, Y.; Focke, W. W.; Wnek, G. E.; Epstein, A. J.; Ray, A.; Department of Chemistry, University of Pennsylvania; Chiang, J. C.; Department of Chemistry, University of Pennsylvania; Macdiarmid, A. G.; Department of Chemistry, University of Pennsylvania; Wei, Y.; Department of Chemistry, Massachusetts Institute of Technology; Focke, W. W.; Department of Chemistry, Massachusetts Institute of Technology; Wnek, G. E.; Department of Chemistry, Massachusetts Institute of Technology; Epstein, A. J.; Department of Physics and Department of Chemistry, The Ohio State University
Журнал:
Molecular Crystals and Liquid Crystals Incorporating Nonlinear Optics
Дата:
1988
Аннотация:
AbstractPoly(o-methylaniline) and poly(o-ethylaniline) have been synthesized by chemical as well as electrochemical methods from the corresponding monomers. The polymers were characterized by elemental analysis, UV-visible spectroscopy and cyclic voltammetry. Upon treatment with 1 M HCl, the conductivity of the polymers increased from ∼10<sup>−8</sup> S/cm to ∼10<sup>−1</sup> S/cm for poly(o-methylaniline) and to ∼10<sup>−3</sup> S/cm for poly(o-ethylaniline). The conductivities, optical spectra and electrochemical behavior of the o-alkylsubstituted polymers are compared with those of polyaniline. The differences are attributed primarily to the steric effect of the alkyl substituents, which alter the torsion angle between the -C<sub>6</sub>H<sub>4</sub>- rings of the polymer.This work was supported by the Defense Advanced Research Projects Agency through a grant monitored by the Office of Naval Research (Y. W. and W. W. F.) and by NSF Grant No. DMR 85-19059 (A. R. and J. C. C.).
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