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このアイテムの引用には次の識別子を使用してください:
http://hdl.handle.net/10119/4950
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| タイトル: | Supramolecular Nanostructured Assemblies of Different Types of Porphyrins with Fullerene Using TiO_2 Nanoparticles for Light Energy Conversion |
| 著者: | Hasobe, Taku
Hattori, Shigeki
Kamat, Prashant V.
Fukuzumi, Shunichi |
| 発行日: | 2006-02-27 |
| 出版者: | Elsevier |
| 誌名: | Tetrahedron |
| 巻: | 62 |
| 号: | 9 |
| 開始ページ: | 1937 |
| 終了ページ: | 1946 |
| DOI: | 10.1016/j.tet.2005.05.113 |
| 抄録: | TiO_2 nanoparticles were modified with porphyrin derivatives, 5-[4-benzoic acid]-10,15,20-tris[3,5-di-tert-butylphenyl]-21H,23H-porphyrin (Ar–H_2P–COOH), 5-[4-benzoic acid]-10,20-tris[3,5-di-tert-butylphenyl]-21H,23H-porphyrin (H–H_2P–COOH), and 5,10,15,20-tetra[4-benzoic acid]-21H,23H-porphyrin (H_2P–4COOH). The porphyrin-modified TiO_2 nanoparticles were deposited on nanostructured OTE/SnO_2 electrode together with nanoclusters of fullerene (C_<60>) in acetonitrile–toluene (3/1, v/v) using an electrophoretic deposition technique to afford the porphyrin-modified TiO_2 composite electrode denoted as OTE/SnO_2/(porphyrin-modified TiO_2 nanoparticle+C_<60>)_n. The porphyrin-modified TiO_2 composite electrodes have efficient light absorbing properties in the visible region, exhibiting the photoactive response under visible light excitation using I_3^-/I^- redox couple. The incident photon-to-photocurrent efficiency (IPCE) values of supramolecular nanostructured electrodes of porphyrin-modified TiO_2 nanoparticles with fullerene [OTE/SnO_2/(Ar–H_2P–COO–TiO_2+C_<60>)_n, OTE/SnO_2/(H–H_2P–COO–TiO_2+C_<60>)_n, and OTE/SnO_2/(H_2P–4COO–TiO_2+C_<60>)_n] are much larger than those of the reference systems of porphyrin-modified TiO_2 nanoparticles without C_<60> [OTE/SnO_2/(Ar–H_2P–COO–TiO_2)_n, OTE/SnO_2/(H–H_2P–COO–TiO_2)_n, and OTE/SnO_2/(H_2P–4COO–TiO_2)_n]. In particular, the maximum IPCE value (41%) is obtained for OTE/SnO_2/(H–H_2P–COO–TiO_2+C_<60>)_n under the bias potential of 0.2 V versus SCE. This indicates that the formation of supramolecular complexes between porphyrins and fullerene on TiO_2 nanoparticles plays an important role in improvement of the light energy conversion properties. |
| Rights: | NOTICE: This is the author's version of a work accepted for publication by Elsevier. Taku Hasobe, Shigeki Hattori, Prashant V. Kamat and Shunichi Fukuzumi, Tetrahedron, 62(9), 2006, 1937-1946, http://dx.doi.org/10.1016/j.tet.2005.05.113 |
| URI: | http://hdl.handle.net/10119/4950 |
| 資料タイプ: | author |
| 出現コレクション: | c10-1. 雑誌掲載論文 (Journal Articles)
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