Electron Magnetic Reonance Studies on the Photoinduced Charge Separtion of N-Methylpehenothiazine in the Gel Matrixes of Phenyltriethoxysilane, Vinyltriethoxysilane, and Methyltriethoxysilane

摘要

The photoproduced cation radical on N-methylphenothiazine (PC_1) doped into phenyltriethoxysilane (PhiTEOS), vinyltriethoxysilane(VTEOS), and methyltriethoxysilane (METOS) was studied with electron spin resonance (ESR) and electron nuclear double resonance (ENDOR). The photoinduced charge separation efficiency was determined by integration of ESR spectra which correspond to the amount of photoproduced cation radical in the matrixes. This was correlatively studied with the polarity and pore size of the gel matrixes. The relative polarity of the matrixes was determined by measuring λ_(max) values of PC_1 in the different matrixes. The relative pore size among the matrixes was determined by measuring relative proton matrix ENDOR line widths of the photoproduced cation radical of PC_1. The decay kinetic constants of the cation radical of PC_2 in the different matrixes were relatively studied with fitting the biexponential decay curves after exposure at the ambient condition. This is correlatively interpreted with the polarity and pore size of the matrixes.