Pressure-induced dimerization kinetics of fullerene C60 |
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| Authors: | V A Davydov L S Kashevarova A V Rakhmanina V M Senyavin O P Pronina N N Oleinikov V Agafonov H Szwarc |
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| Institution: | (1) Institute of High-Pressure Physics, Russian Academy of Sciences, Troitsk, Moscow region, 142190, Russia;(2) Moscow State University, Vorob’evy gory, Moscow, 119899, Russia;(3) Laboratoire de Chimie Physique, Faculte de Pharmacie de l’Universite de Tours, 37200 Tours, France;(4) Laboratoire de Chimie Physique des Materiaux Amorphes, Universite Paris XI, 91405 Orsay, France |
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| Abstract: | Dimerization kinetics was studied for fullerene C60 by IR spectroscopy at a pressure of 1.5 GPa in the temperature range 373–473 K. The kinetic curves for the formation of a dimer (C60)2 were obtained using its analytical IR band at 796 cm?1. Under the assumption that pressure-induced C60 dimerization is a second-order irreversible reaction, the reaction rate constants were determined at different temperatures. The corresponding activation energy and preexponential factor were found to be 134±6 kJ/mol and (1.74± 0.24)×1014 s?1, respectively. The specific features of the solid-phase C60 dimerization in simple cubic and face-centered cubic fullerite phases are discussed. |
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