- 作者: --
- 作者服務機構: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira, Sendai, 980-8577, Japan
- 中文摘要: Photoinduced electron-transfer processes between fullerenes (C60) and three triphenylamines (TPA’s) including bis(tolylaminophenyl)cyclohexane in the absence and presence of hexylviologen dication (HV2+) and 1-benzyl-1,4-dihydronicotinamide (BNAH) have been studied by the transient absorption method in the visible and near-IR regions. Electron-transfer takes place initially from TPA’s to the triplet states of fullerenes (3C60*), giving the radical anions of fullerenes (C60·-) and the radical cations of TPA’s (TPA·+). The rate constants and efficiencies of electron transfer are quite high, because of the high electron-donor abilities of TPA’s as their low oxidation potentials indicate. On addition of HV2+ to the C60 and TPA systems, the electron-mediating process from C60·- to HV2+ occurs, yielding the viologen radical cation (HV·+). In the further addition of BNAH, which acts as a sacrificial donor, steady-state concentration of HV·+ was accumulated during continuous photoirradiation and persisted for a long time.
- 英文摘要: --
- 中文關鍵字: [60]Fullerene; Triphenylamines; Electron transfer; Electron mediating; Laser photolysis.
- 英文關鍵字: --