Abstract
The total quenching rate constants (sum of physical quenching and chemical reaction) of singlet oxygen 1O 2 by various fullerenes (C 60, C 70, C 76, C 82, La@C 82, Ce@C 82, Ce 2@C 80) were determined. The 1O 2 quenching capabilities of C 82 and endohedral metallofullerenes are found to be comparable to that of β-carotene, a well-known strong 1O 2 quencher. This remarkable 1O 2 quenching by metallofullerenes is explicable in terms of a combination of energy and charge transfer processes.
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