Photoelectrochemical cell based on the ion pair 1,1'-dimethyl-4,4'-bipyridinium bis(tetraphenylborate). Photocurrents from the direct irradiation of a donor-acceptor complex

摘要: An electron-transfer photoelectrochemical cell has been designed which utilizes the intermolecular charge-transfer (CT) transition of donor-acceptor ion pair 1,1'-dimethyl-4,4'-bipyridinium bis(tetraphenylborate) ((PQ)(BPh/sub 4/)/sub 2/; PQ/sup 2 +/ = (paraquat)) to produce photocurrents. The is based on fact that photolysis (436 less than or equal lambda 366 nm) into CT band in acetonitrile solution leads photodecomposition giving +/, BPh/sub 3/, and biphenyl. produced photoanode can act as a reductant toward an electron acceptor such tetracyanoquinodimethane (TCNQ) dark, cathode compartment net electrochemical cell. Evaluation total charge generated 0.1 M LiClO/sub 4/ allows estimate 0.01 be made for separation yield (phi/sub sep/) production 4/. Following pair.