Ion transfer and photoinduced electron transfer of water-soluble porphyrin at the nitrobenzene|water interface

Abstract

Ion-transfer reactions of a water-soluble porphyrin, meso -tetrakis( p -sulfonatophenyl)porphyrin (H 2 TPPS 4− ), and its zinc complex (ZnTPPS 4− ) at the nitrobenzene | water (NB | W) interface were studied by cyclic voltammetry. In particular, for H 2 TPPS 4− , the effect of acid–base equilibria on the ion-transfer potential was analyzed theoretically. In addition, the photocurrent response for ZnTPPS 4− at the NB | W interface was observed potentiostatically, and a certain effect of EDTA as the sacrificial reagent on the photocurrent was confirmed.