Photoinduced electron transfer of platinum(ii) bipyridine diacetylides linked by triphenylamine- and naphthaleneimide-derivatives and their application to photoelectric conversion systems

Shuichi Suzuki*, Yuma Matsumoto, Mai Tsubamoto, Ryoji Sugimura, Masatoshi Kozaki, Kenshi Kimoto, Munetaka Iwamura, Koichi Nozaki, Naoki Senju, Chiasa Uragami, Hideki Hashimoto, Yohei Muramatsu, Akinori Konno, Keiji Okada

*この論文の責任著者

研究成果: ジャーナルへの寄稿学術論文査読

46 被引用数 (Scopus)

抄録

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-I2)/Pt exhibited a poor energy conversion efficiency (η = 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.

本文言語英語
ページ(範囲)8088-8094
ページ数7
ジャーナルPhysical Chemistry Chemical Physics
15
21
DOI
出版ステータス出版済み - 2013/06/07

ASJC Scopus 主題領域

  • 物理学および天文学一般
  • 物理化学および理論化学

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