MONITORING ELECTRON-TRANSFER BY PHOTOACOUSTIC-SPECTROSCOPY

The electron transfer process between octaethylporphin and quinone mol ecules dispersed in a polymeric matrix was studied by the photoacousti c technique. It was observed that there was an enhancement of the octa ethylporphin photoacoustic signal with an increase of the quinone conc entration in the films. This increase appeared to be complementary to octaethylporphin fluorescence quenching and was associated with the el ectron transfer process. The data were analyzed according to the theor y developed by Kaneko for fluorescence data (Kaneko 1992).