Electronic Spectra and Electric Properties of Poly(1-methyl-4-vinylpyridinium)–TCNQ Salt

Abstract

Abstract Electronic spectra and conductivities of poly(1-methyl-4-vinylpyridinium)–TCNQ anion radical salts and complex salts which contain additional neutral TCNQ were studied. By addition of neutral TCNQ, a new electronic absorption band appears at 3500 cm−1 and the charge-transfer band between TCNQ anion radicals disappears. It was concluded that this new absorption band is the charge-resonance band between a TCNQ, anion radical and neutral TCNQ molecule from the dependence of its absorption intensity on the amount of added neutral TCNQ. The conductivity of the salt changed from 7×10−8 to 8×10−3Ω−1 cm−1 by inclusion of the neutral TCNQ. This change of conductivity was explained in relation with the change of the absorption spectra of these polymer salts.