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Pressure‐dependent infrared spectroscopy on the fullerene rotor–stator compound C 60 –C 8 H 8
Author(s) -
Kuntscher C. A.,
Frank S.,
Kamarás K.,
Klupp G.,
Kováts É.,
Pekker S.,
Bényei Gy.,
Jalsovszky I.
Publication year - 2006
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200669124
Subject(s) - fullerene , infrared spectroscopy , infrared , spectroscopy , materials science , rotor (electric) , analytical chemistry (journal) , chemistry , physics , organic chemistry , optics , quantum mechanics
We carried out infrared transmission measurements of C 60 –C 8 H 8 as a function of pressure (0–10 GPa) at room temperature. The kinks in the pressure dependences of the frequencies of the molecular vibrations suggest the occurrence of an orientational ordering transition at around 0.8 GPa. The change in the infrared spectrum indicates symmetry lowering in the high‐pressure phase. Furthermore, our data show that the vibrations of C 8 H 8 survive up to a higher pressure than those of C 60 , suggesting a shielding of the C 8 H 8 molecules against pressure. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)