Abstract

Abstract Doping level and temperature dependence (4.2K-300K) of infrared absorption spectra of I2 and MoCl5. doped polyacetylene and deuterated polyacetylene are reported within spectral range 400–2000cm−1. They exhibit two absorption ranges. The 1370 cm CH mode (1160 cm−1 for CDx) is a charged soliton mode. The low frequency part (400–1000 cm−1 for CHx. 400–900 for CDx) can be analysed into resonant mode and doping species optical modes superimposed to a pinning mode.

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