Control of electron transfer and its utilization

In order to get information on the controlling factors of photosynthetic electron transfer and to apply the principle for the construction of artificial photosynthesis and molecular electronics, we have so far prepared various model compounds from which particular factors can be extracted. Among them our recent results on 1) mutual orientation effect, 2) effect of the nature of intervening bonds, 3) effect of inserted pi-system, 4) effect of coordination bond between a redox pair, 5) size and shape effect of an acceptor, are described. In order to utilize charge separated state, C60-linked porphyrin with SMe group at the terminal position was synthesized and fixed it on gold surface using S-Au bond as self-assembled monolayer. When the sample was irradiated, photocurrent was observed.