MECHANISMS OF LIGHT-INITIATED REDOX REACTIONS OF COPPER(II)-CYCLIC POLYAMINE SURFACTANT ASSEMBLIES.

Article abstract of DOI:10.1246/bcsj.54.3265

Photo-induced reduction of Cu**2** plus ion by organic electron donors was studied, main attention being paid to the decay kinetics of the cathionized donor using two kinds of Cu**2** plus ions; one is free to move around the micellar surface of copper(II) dodecyl sulfate(Cu(DS)//2), the other being fixed in a cyclic polyamine, Cu**2** plus complex of 2-tetradecyl-1,4,7,10-tetraazacyclododecane (CPA). Sodium 12-(10-phenothiazinyl)dodecanesulfonate (PTHDS) functions quite similarly to N-methylphenothiazine (MPTH) in an electron transfer reaction in Cu(DS)//2 micelles, and the reduced Cu** plus is ejected from the micelles. In the MPTH-CPA system, MPTH** plus is completely ejected from the host micelle in the CPA micellar system. In consequence, the decay of the cationized donor obeys a second-order rate law, while the rate constant becomes much less.