Elsevier

Synthetic Metals

Volume 32, Issue 1, 1 October 1989, Pages 103-112
Synthetic Metals

A new method for obtaining polyparaphenylene films by electrochemical oxidation of (Benzene-SbF5) π-complexes in SO2 medium

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Abstract

A new method for preparing polyparaphenylene films by electrochemical oxidation of benzene in SbF5SO2 medium is described. It is shown that formation of a π-complex between SbF5 and benzene lowers the benzene oxidation potential by about 0.8 V. The polymer chains, analysed by i.r. spectroscopy, show very good linearity and the degree of polymerization ranges from 15 to 30 for t = −75°C and t = −30°C, respectively. In contrast, no significant variations were observed in the u.v. spectra, which in all cases are characterized by an absorption band at about 3.5 eV. n-Doping of these films was carried out in (Bu)4NBF4-THF and was observed to be homogenous when the film was about 1 μm thick.

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