EFFECTS OF CLAY-WATER INTERFACE ON THE PHOTOINDUCED ELECTRON TRANSFER FROM RUTHENIUM-BIPYRIDYL COMPLEX TO METHYLVIOLOGEN
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- NAKATO TERUYUKI
- Department of Applied Chemistry, Kyushu Institute of Technology
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- WATANABE SHOKO
- Graduate School of Bio-Applications and Systems Engineering(BASE), Tokyo University of Agriculture and Technology
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- FUJITA TAKAKO
- Graduate School of Bio-Applications and Systems Engineering(BASE), Tokyo University of Agriculture and Technology
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- MOURI EMIKO
- Department of Applied Chemistry, Kyushu Institute of Technology
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Abstract
Photoinduced electron transfer (PET) was investigated in multicomponent aqueous suspensions composed of tris(2,2'-bipyridine)ruthenium(II) (Ru(bpy)_3^<2+>, photocatalyst), methylviologen (1,1'-dimethyl-4,4'-bipyridinium dication, MV^<2+>, electron acceptor), and ethylenediaminetetraacetate (EDTA, sacrificial electron donor) together with particles of smectite-type clays, where Ru(bpy)_3^<2+> and MV^<2+> are present in excess compared with CEC of the clay minerals. Clays with different particle sizes - fluorohectorite (FH) and montmorillonite (Mont) with large particle sizes (>0.1μm), and hectorite (Hect) and saponite (Sapo) with small particle sizes (〜30nm) - were examined, and the PET reaction proceeded in all of the suspensions to yield methylviologen radical cation (MV^<+・>) as the product. However, the difference in the clay particle size gave different product distribution; the large-size clays dominantly gave MV^<+・> dimers whereas the small-size clays mainly produced MV^<+・> monomers similarly to a homogeneous aqueous solution. Also, the large-size clays more stabilized the MV^<+・> species than the small-size ones. These results evidenced contribution of the clay-water interfaces to the reaction.
Journal
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- Clay Science
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Clay Science 17 (2), 23-29, 2013
The Clay Science Society of Japan
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Details
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- CRID
- 1390282679087941760
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- NII Article ID
- 110009614918
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- NII Book ID
- AA00607148
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- ISSN
- 21863555
- 00098574
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- NDL BIB ID
- 024709350
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed