Synthesis and characterization of Hg metal-doped C<inf>60</inf>

V. Venegas, J. Ortiz-López, G. Rueda-Morales, F. Caleyo

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Synthesis of the new fulleride HgxC60 was achieved inside an evacuated ampoule filled with metallic Hg and C60 powder kept at 500°C for several months. A heat capacity anomaly is observed at 232.3 K, reminiscent of the ordering transition of pristine C60 but with reduced transition enthalpy. Weakly shifted F1u infrared bands suggest lack of Hg-C60 charge transfer. The structure at 300 K is as in pristine C60 but with a measurable lattice expansion consistent with Hg intercalation in octahedral sites. This lattice expansion induces downshift of the ordering transition and weak displacement of infrared bands.
Original languageAmerican English
Pages (from-to)655-661
Number of pages588
JournalChemical Physics Letters
StatePublished - 3 Mar 2000


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