Ethyl oleate ozonide as an epoxidation tool of C₆₀ and C₇₀ fullerenes

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.

KEYWORDS:

• fullerenes
• ozonides
• epoxidation
• kinetics
• activation energy