The influence of transition metal compounds on the oxidation of crystalline Fullerene C-60статья

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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.

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[1] The influence of transition metal compounds on the oxidation of crystalline fullerene c-60 / A. N. Pushkin, A. A. Lushov, O. K. Gulish et al. // Russian Journal of Physical Chemistry A. — 2005. — Vol. 79, no. 4. — P. 557–562. Oxides of several transition metals (Cr, Mn, Fe, Co, Ni, and Cu) were found to have a positive catalytic action and Zn, a negative action on the oxidation of fullerene C-60 by molecular oxygen to CO2 at 400-500 degrees C. Zinc oxide in 1 : 1 mixtures with transition metal oxides had a passivating action on their activity in the oxidation of C-60 (a strong passivating action in mixtures with Mn, Fe, and Cr oxides, a weak passivating action with Ni oxide, and no passivating action over the entire temperature range with Co and Cu oxides). X-ray photoelectron spectroscopy measurements showed that the admixtures deposited on C-60 by impregnating it with solutions of metal trifluoroacetates in acetone with subsequent calcining were metal oxides and that C-O bonds were formed at the initial oxidation stages. The Raman spectra were indicative of the formation of C-60 dimers in the oxidation of C-60 with Cr2O3 and Fe2O3 admixtures, which was substantiated by chromato-mass spectrometric analysis of the products of oxidative hydratodisproportionation of C-60, which, along with the usual fragmentation products (2-phenoxyethanol, naphthalene, etc.) contained several saturated hydrocarbons with the normal structure of hydrocarbon chains and the number of carbon atoms from 20 to 28.

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