Abstract

Fourier transform infrared photoacoustic (FT-IR-PA) spectroscopy has been used to obtain the first published infrared spectrum of a heavily <i>n</i>-doped polyacetylene. Comparisons are made with the FT-IR-PA spectrum of undoped polyacetylene. All the infrared peaks in the FT-IR-PA spectrum of undoped polyacetylene agree in wavelength to ±10 cm⁻¹ with transmission infrared peaks previously assigned by Shirakawa and Ikeda. Spectral shifts and intensity differences between the <i>n</i>-doped and undoped polyacetylene are similar to changes noted previously in the infrared spectra of <i>p</i>-doped polyacetylenes.

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