ESR of the π-Radical Formed by Photoreduction of Bis(1,2,5-selenadiazolo)-tetracyanoquinodimethane in Methanol. Observation of a Large 77Se Hfs

A large 77Se hfs was observed in the ESR spectrum of a radical generated by photoreduction of the electron acceptor, BSDA-TCNQ(3), with 355 nm laser irradiation in methanol. This spectrum was identified as the anion radical of a proton adduct of 3, which was supported by the MO calculation.