Step-by-step fabrication of porphyrin-fullerene supramolecular assemblies and their photoelectrochemical properties

Ken Ichi Matsuoka, Tsuyoshi Akiyama, Sunao Yamada

    研究成果: ジャーナルへの寄稿学術誌査読

    21 被引用数 (Scopus)

    抄録

    Porphyrin-fullerene C60 multilayered films have been successfully fabricated on an indium-tin-oxide (ITO) substrate by step-by-step, self-assembling, and surface sol-gel processes. First, cysteamine was self-assembled on the ITO surface, and then a C60 layer was formed via N-H addition reaction. The layered C60 further underwent another N-H addition with 1,2-diaminoethane to enable formation of the subsequent C 60 layer, giving a double-layered C60 film. Meanwhile, the layered C60 was treated with 2-aminoethanol to implant hydroxy groups on the C60 layer, which was essential to promote the surface sol-gel reaction with titanium-(IV) butoxide for implanting the titanium oxide layer. Then tetracarboxyphenylporphyrin was superimposed on the titanium oxide layer by the subsequent surface sol-gel reaction. By repeating these surface sol-gel reactions, the porphyrin layer was further assembled on the outermost layer. Accordingly, the porphyrin and C60 multilayered films could be fabricated by the series of above-described step-by-step reactions. Absorption, fluorescence, quartz crystal microbalance, and photoelectrochemical investigations were carried out. Considerable photoinduced electron transfer between photoexcited porphyrin to C60 was verified, even in the presence of the titanium oxide linking layer. Appreciable photocurrent generation from the multilayered films was observed, and its mechanism is described.

    本文言語英語
    ページ(範囲)7015-7020
    ページ数6
    ジャーナルJournal of Physical Chemistry C
    112
    17
    DOI
    出版ステータス出版済み - 5月 1 2008

    !!!All Science Journal Classification (ASJC) codes

    • 電子材料、光学材料、および磁性材料
    • エネルギー(全般)
    • 物理化学および理論化学
    • 表面、皮膜および薄膜

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