Abstract
Raman spectra of the molecular donor–acceptor complex {Pt(dbdtc)2}C60 (C60 fullerene with platinum dibenzyldithiocarbamate) were measured as a function of pressure up to 8GPa. In the low pressure regime (P<0.5GPa), the phonon modes related to the C60 molecule split and soften, indicating the formation of intercage covalent bonds. Additional splitting of Raman modes is observed at ∼2.5GPa and is attributed to the formation of a polymeric network. The high-pressure phase remains stable upon pressure decrease, however at ∼0.5GPa the material transforms to a new phase characterized by a Raman spectrum which is quite different from those of the known polymers of C60.
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