RT Journal Article T1 Photochemical site-selective synthesis of [70]methanofullerenes A1 Vidal, Sara A1 Izquierdo, Marta A1 Kit Law, Wai A1 Jiang, Kui A1 Filippone, Salvatore A1 Perles Hernáez, Josefina A1 Yan, He A1 Martín, Nazario AB 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. PB RSC SN 1359-7345 YR 2016 FD 2016 LK https://hdl.handle.net/20.500.14352/23181 UL https://hdl.handle.net/20.500.14352/23181 LA eng NO Unión Europea. FP7 NO Ministerio de Economía y Competitividad (MINECO) NO Comunidad de Madrid NO European Research Council (ERC) DS Docta Complutense RD 6 abr 2025