Ethyl oleate ozonide as an epoxidation tool of C60 and C70 fullerenes |
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Authors: | Ornella Ursini Franco Cataldo |
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Affiliation: | 1. CNR–Istituto di Metodologie Chimiche, Montelibretti, Rome, Italy;2. Actinium Chemical Research Institute, Rome, Italy;3. Università degli Studi della Tuscia, Dipartimento di Scienze Ecologiche e Biologiche, Viterbo, Italy |
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Abstract: | When dissolved in ethyl oleate secondary ozonide, both C60 and C70 fullerenes undergo a series of epoxidation reactions. The pseudofirst-order kinetic rate constants of this process were determined spectrophotometrically at various temperatures and the activation energy for C60 epoxidation through ethyl oleate ozonide was found at 25.9 kcal/mol. Furthermore, C60 was found more reactive than C70 with the ozonide. The kinetics rate constants of C60 epoxidation with ethyl oleate ozonide were compared with the C60 photo-oxidation and auto-oxidation determined in pure ethyl oleate. The epoxidation of fullerenes starts from the homolysis of the peroxide group of the 1,2,4-trioxolane ring of ethyl oleate secondary ozonide. Thus, it is suggested that fullerenes have a potential as decomposition agents of secondary ozonides in some technological applications. |
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Keywords: | fullerenes ozonides epoxidation kinetics activation energy |
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