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Novel [60]fulleropyrrolidine derivatives were synthesized and evaluated based on device performance. TheN-phenyfulleropyrrolidines showed better photovoltaic performance than theN-alkyl derivatives and showed high PCE up to 7.3% on combination with PTB7.

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Polyesters containing donor-acceptor norbornadiene (D-A NBD) residues in the main chain were synthesized by the polyaddition of D-A NBD dicarboxylic acids, 5-(4-methoxyphenyl)-1,4,6,7,7pentamethyl-2,5-norbornadiene-2,3-dicarboxylic acid and 5,6-bis(4-methoxyphenyl)-7,7-dimethyl-2,5norbornadiene-2,3-dicarboxylic acid, with bis(epoxide)s. The photoisomerization of the NBD residues in the resulting polyesters proceeded smoothly to give the corresponding quadricyclane (QC) groups. The NBD residues in these polyesters showed resistivity to repeated cycles of the interconversion.

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