Soluble photopolymer: Isolation of cycloadduct oligomers from the phototransformed C-60

We describe a novel preparative method for the photopolymerization of C-60 in gram quantities. The monomer was recycled during fh reaction by a liquid phase transport giving rise to a high yield of the polymer. For the first time, the cycloadduct dimer and the solubl mixtures of various higher oligo mers were extracted from the phototransformed material. The influence of th e preparation temperature o: the yield and on the structure of the formed p olymer is discussed. At around 80 degreesC, photopolymerization is a compet itive method for th production of pure dimer.