Pressure-induced dimerization of fullerene C-60: a kinetic study

Davydov VA; Kashevarova LS; Rakhmanina AV; Senyavin VM; Pronina OP; Oleynikov NN; Agafonov V; Ceolin R; Allouchi H; Szwarc H

Chemical Physics Letters, Vol.333, No.3-4, 224-229, 2001

DOI10.1016/S0009-2614(00)01379-8 Export Citation

Pressure-induced dimerization of fullerene C-60: a kinetic study

Davydov VA, Kashevarova LS, Rakhmanina AV, Senyavin VM, Pronina OP, Oleynikov NN, Agafonov V, Ceolin R, Allouchi H, Szwarc H

The kinetics of pressure-induced dimerization of fullerite C-60 at 1.5 GPa in the 373-473 K temperature interval was studied by X-ray diffraction, infrared and Raman spectroscopy. Kinetic curves of the dimerization reaction in the fee and sc phases of C-60 were obtained by monitoring the dimeric (C-60)(2) IR line at 796 cm(-1). The value of the dimerization activation energy was determined to be E-a(dim) = 134 +/- 6 kJ mol(-1),assuming the second order irreversible reaction. The peculiarities of the dimerization processes in the fee and sc phases of C-60 fullerite are also discussed.