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Investigation of the Jahn–Teller effect in the ${\rm C}_{60}^{{-} } $ monoanion under high pressure
Author(s) -
Francis E. A.,
Scharinger S.,
Németh K.,
Kamarás K.,
Kuntscher C. A.
Publication year - 2010
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.201000201
Subject(s) - jahn–teller effect , distortion (music) , infrared , symmetry (geometry) , electrochemistry , chemistry , materials science , analytical chemistry (journal) , physics , crystallography , ion , optics , electrode , optoelectronics , amplifier , geometry , organic chemistry , cmos , mathematics , chromatography
We report the Jahn–Teller (JT) dynamics of the ${\rm C}_{60}^{{-} } $ monoanion under pressure in (Ph 4 P) 2 IC 60 . (Ph 4 P) 2 IC 60 was synthesized by electrochemical crystallization and investigated by infrared transmission measurements up to 5 GPa. The behavior of two T 1 u vibrational modes of ${\rm C}_{60}^{{-} } $ , which exhibit signatures of the dynamic JT effect at ambient conditions, was followed under pressure. The pressure‐induced transition from the dynamic to the static JT state was observed at ∼2 GPa. Due to symmetry lowering related to the dynamic JT effect, the G 1 u mode is activated and shows a splitting at the pressure‐induced dynamic‐to‐static JT distortion.