Optical properties of N-propylquinolinium(TCNQ)2 through the phase transition

Kamarás, Katalin and Jacobsen, C. S. and Zelezny, V. (1991) Optical properties of N-propylquinolinium(TCNQ)2 through the phase transition. SYNTHETIC METALS, 42. pp. 1839-1842. ISSN 0379-6779

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Abstract

We have investigated the infrared and optical reflectivity of a single crystal of Npropylquinolinium( TCNQ)2, a salt containing TCNQ tetramers. For light polarized along the chain axis, the spectra show a change below the 220 K phase transition: the vibrational lines split into doublets. These findings are in contradiction with the crystal structure, where tetramers become more uniform upon cooling and no intermolecular charge redistribution is found.

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