Distortions of C-60(4-) studied by infrared spectroscopy

Klupp, Gyöngyi and Borondics, F. and Oszlányi, Gábor and Kamarás, Katalin (2003) Distortions of C-60(4-) studied by infrared spectroscopy. In: Molecular nanostructures: XVII International Winterschool/Euroconference on Electronic Properties of Novel Materials. AIP Conference Proceedings (685). American Institute of Physics (AIP), New York, pp. 62-65. ISBN 0735401543

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Abstract

The Jahn-Teller effect plays a crucial role in the explanation of the insulating character of A(4)C(60) (A = K, Rb, Cs). To detect possible phase transitions arising from the interplay between the molecular Jahn-Teller distortion and the distorting potential field of the counterions, we measured the mid-IR spectra of A(4)C(60) compounds in the temperature range 90 - 300 K and found significant spectral changes with temperature in all three compounds. We also compare these spectra to that of Na(4)C(60) in its room-temperature polymeric phase, where the distortion is more pronounced and evident from the structure.

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