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Phase transitions in hydrofullerene C60H36 studied by luminescence and Raman spectroscopy at pressure up to 12 GPa
Meletov K.P.1,2, Assimopoulos S.1, Kourouklis G.A.1, Bashkin I.O.2
1Physics Division, School of Technology, Aristotle University of Thessaloniki, GR-540 06 Thessaloniki, Greece
2Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Russia
Email: mele@issp.ac.ru
Выставление онлайн: 17 февраля 2002 г.

The effect of hydrostatic pressure on the photoluminescence and Raman spectra of hydrofullerene C60H36 has been investigated for pressure up to 12 GPa at room temperature. The samples were synthesized by means of high-pressure hydrogenation. The pressure coefficients of the phonon modes are positive and demonstrate singularities at ~ 0.7 and ~ 6 GPa. The pressure shift of the luminescence spectrum is unusually small and increases somehow at P>=q 6 GPa. All observed features are reversible with pressure and C60H36 is stable in the pressure region investigated. This work was supported, in part, by the Russian Foundation for Fundamental Research (grants N 99-02-17555 and 99-02-17299), and the Russian Research and Development Program "Fullerenes and Atomic Clusters" (grant N 98079). The support by the General Secretariat for Research and Technology, Greece (grant N ПENEDelta 99, 99EDelta/62) is acknowledged.
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