HPLC Separation of Soluble (C{sub}60){sub}n Oligomers From Fullerene Photopolymer

摘要

Applying a recent photopolymerization method, we produced polymerized C{sub}60 in a gram scale and extracted different composition mixtures of its soluble components. We separated the oligomers by high-performance liquid chromatography (HPLC). The major component of the soluble fractions is the (2+2) cycloadduct dimer, C{sub}120. Besides the dimer, we detected 3 different trimers and several higher oligomers including tetramers. The variation of the relative amounts of the trimers with the experimental conditions of polymerization is discussed in terms of the rate of formation and thermodynamic stability.