期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 15, 期 21, 页码 8088-8094出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3cp50182e
关键词
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资金
- Japan Society for Promotion of Science (JSPS) [2350066, 24550062, 22550057, 23-8419]
- Kansai Research Foundation for technology promotion
- Association for the Progress of New Chemistry
- JGC-S Scholarship Foundation
- Grants-in-Aid for Scientific Research [11J08419, 22550057, 24550062, 22350066, 24107002] Funding Source: KAKEN
The recently reported efficient charge-separated system based on bipyridine-diacetylide platinum(II) complexes was applied to photoelectric conversion systems herein, based on the design and synthesis of two triads: MTA-Pt-NDISAc (3, MTA: dimethoxytriphenylamine, Pt: platinum(II) complex, NDISAc: thioacetate derivative linked to naphthalenediimide) and MTA-Pt-MNICOOH (4, MNICOOH: naphthaleneimide-4-carboxylic acid). The charge-separated (CS) states of triads 3 and 5 (MOM-protected 4) were effectively generated by photo-induced electron transfer in both THF and toluene, although the rate of formation of the CS state from 5 was relatively slow in toluene. The lifetimes of these CS states were determined to be 730 ns in toluene and 61 ns (70%) and 170 ns (30%) as a double exponential decay in THF for 3, and 600 ns in toluene and 170 ns in THF for 5. The acetylthio group of triad 3 was exploited in the preparation of a self-assembled monolayer (SAM) on a gold surface. Photocurrent was detected upon irradiation of an electrochemical cell comprising Au/3/Na ascorbate/Pt, which was ascribed to the platinum(II) complex based on the action spectrum. The carboxylic acid group of triad 4 facilitated adsorption on the TiO2 surface, and a dye-sensitized solar cell constructed based on FTO/TiO2/4/electrolyte (LiI-I-2)/Pt exhibited a poor energy conversion efficiency (eta = 0.20%) based on the incident photon-to-current conversion efficiency spectrum and the I-V curve. This poor efficiency may be derived from the bent molecular shape of 4, or may be due to a possible high energy barrier in the electron injection process through the adsorption site.
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