Abstract
The main properties of the triplet states and the yields of singlet oxygen generation for a series of methano[60]fullerene adducts with increasing numbers of substituents were determined. The triplet properties investigated are energies, triplet−triplet absorption spectra, extinction coefficients, and quantum yields. A strong correlation is observed between several triplet properties and the topology of the fullerene core. Successive fragmentation of the chromophore of the parent C60 results in higher triplet energies and lower triplet quantum yields. In addition, singlet oxygen quantum yields (φΔ) were determined for all adducts and decrease as the area of the conjugated fullerene core decreases.
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