科研之友
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摘要
Raman spectra of a polythiophene film measured over a temperature range 298-98 K were analyzed using generalized two-dimensional correlation spectroscopy. In the 1600-1250 cm(-1) region, the asynchronicity of the bands indicates the existence of different species in the investigated polythiophene sample. At least four distinct bands at 1485, 1454, 1418, and 1360 cm(-1) were identified. Among them, the band at 1454 cm(-1), attributed to the neutral species of PTh, is found to be sensitive to the temperature-induced structural changes of the polythiophene film, while the bands of the oxidized species are less sensitive to the temperature change during the cooling process.
