Oxazolidinofullerene

Abstract

The first synthesis of the oxazolidinofullerene 2 has been achieved by cycloaddition of C₆₀ with N₃CO₂Et, followed by the treatment of the product with B Br₃ at room temperature. The structure of 2 was unambiguously established by spectroscopic means (¹³C NMR and MS). Methylcyclohexane solutions of aziridinofullerene 1a and oxazolidinofullerene 2 exhibited, at ambient temperature, fluorescence emission at λ_max 686 and 691 nm, respectively, with vibronic fine structure. The fluorescence lifetimes and quantum yields for 1a and 2 have been measured.