PHOTOSENSITIZATION SYSTEMS OF COVALENTLY-LINKED PHTHALOCYANINE COMPLEXES IN BOTH BILAYER-LIPID MEMBRANES AND TIN OXIDE PHOTOVOLTAIC CELL

Zinc phthalolocyanine photosensitized donor-acceptor systems for light energy conversion and for the design of photoelectrochemical molecula r devices are presented. Covalently linked phthalocyanine complexes we re incorporated in bilayer lipid membranes (BLM) and deposited on SnO2 transparent electrodes. Their photovoltages were measured and compare d. It has been found that a more favorable orientation and closer prox imity are attained in the diad compounds between the donor (phthalocya nine)-acceptor (anthraquinone) pair than in the reference compound for efficient light-induced charge separation and transfer. The triad com pound is the best among all tested compounds. The decrease in the fluo rescence yield and lifetime induced by quinones was examined and the a pparent electron-transfer rate constants were calculated.