Step-by-Step Fabrication of Porphyrin-Fullerene Supramolecular Assemblies and Their Photoelectrochemical Properties
详细信息 查看全文
- 作者：Ken-ichi Matsuoka ; Tsuyoshi Akiyama ; Sunao Yamada
- 刊名：Journal of Physical Chemistry C
- 出版年：2008
- 出版时间：May 1, 2008
- 年：2008
- 卷：112
- 期：17
- 页码：7015 - 7020
- 全文大小：406K
- 年卷期：v.112,no.17(May 1, 2008)
- ISSN：1932-7455
文摘
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-assembledon the ITO surface, and then a C60 layer was formed via N-H addition reaction. The layered C60 furtherunderwent another N-H addition with 1,2-diaminoethane to enable formation of the subsequent C60 layer,giving a double-layered C60 film. Meanwhile, the layered C60 was treated with 2-aminoethanol to implanthydroxy 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 superimposedon the titanium oxide layer by the subsequent surface sol-gel reaction. By repeating these surface sol-gelreactions, the porphyrin layer was further assembled on the outermost layer. Accordingly, the porphyrin andC60 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 thepresence of the titanium oxide linking layer. Appreciable photocurrent generation from the multilayered filmswas observed, and its mechanism is described.