%0 Journal Article
%A Vidal, Sara
%A Izquierdo, Marta
%A Kit Law, Wai
%A Jiang, Kui
%A Filippone, Salvatore
%A Perles, Josefina
%A Yan, He
%A Martín, Nazario
%T Photochemical site-selective synthesis of [70]methanofullerenes
%D 2016
%@ 1359-7345
%U https://hdl.handle.net/20.500.14352/23181
%X Methanofullerenes such as the well-known [70]PCBM are commonly synthesized under harsh conditions to obtain the product as a mixture of site-isomers (namely a, b and minor c) due to the D5h symmetry of the C70 cage. We report the first site-selective synthesis of [70]methanofullerenes under light irradiation and low temperatures, thus avoiding time-consuming and highly expensive HPLC separations. Pure major site-isomers a-[70]PCBM and a-[70]DPM have been thus efficiently prepared including the crystal structure of 5b. Photovoltaic preliminary results revealed a slightly beneficial performance for a-pure [70]PCBM site-isomer devices.
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