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| Title: | Organization of supramolecular assembly of 9-mesityl-10-carboxymethylacridinium ion and fullerene clusters on TiO_2 nanoparticles for light energy conversion |
| Authors: | Hasobe, Taku
Hattori, Shigeki
Kamat, Prashant V.
Wada, Yuji
Fukuzumi, Shunichi |
| Issue Date: | 2005 |
| Publisher: | Royal Society of Chemistry |
| Magazine name: | Journal of Materials Chemistry |
| Volume: | 15 |
| Number: | 3 |
| Start page: | 372 |
| End page: | 380 |
| DOI: | 10.1039/b413336f |
| Abstract: | TiO_2 nanoparticles modified with composite nanoclusters of 9-mesityl-10-carboxymethylacridinium ion (Mes–Acr^+–COOH) and fullerene (C_<60>) in acetonitrile/toluene (3 : 1, v/v) were deposited as thin films on nanostructured SnO_2 electrode using an electrophoretic technique. The composite TiO_2 films have broad as well as high absorbance properties, exhibiting photoactive response under visible light excitation using I_3^–/I^– redox couple as compared with the reference multilayer films composed of the single component. This indicates that the composite cluster TiO_2 film based on 9-mesityl-10-carboxymethylacridinium ion and fullerene harvests light widely in the visible region due to organization of the supramolecular assembly. In the case of a monolayer system of TiO_2 nanocrystallites modified with Mes–Acr^+–COOH, however, no net photocurrent is observed in the photocurrent action spectrum. This indicates that TiO_2 nanoparticles act as materials to organize composite molecules rather than as those to accept electrons. An incident photon-to-photocurrent generation efficiency (IPCE) of 37% has been achieved at an applied bias potential of 0.2 V vs. SCE in the Mes–Acr^+–COOH/C_<60> composite system using TiO_2 nanoparticles. |
| Rights: | Copyright (C) 2005 Royal Society of Chemistry. Taku Hasobe, Shigeki Hattori, Prashant V. Kamat, Yuji Wada, and Shunichi Fukuzumi, Journal of Materials Chemistry, 15(3), 2005, 372-380. http://dx.doi.org/10.1039/b413336f - Reproduced by permission of The Royal Society of Chemistry |
| URI: | http://hdl.handle.net/10119/7907 |
| Material Type: | author |
| Appears in Collections: | c10-1. 雑誌掲載論文 (Journal Articles)
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