2005 Fiscal Year Final Research Report Summary
Control of Structure and Photoproperties on Cationic Tetraphenylporphyrinatoantimony(V)/Synthetic Clay Composites
| Project/Area Number |
16550127
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Functional materials chemistry
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| Research Institution | University of Miyazaki |
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Principal Investigator |
SHIRAGAMI Tsutomu University of Miyazaki, Faculty of Engineering, Associate Professor, 工学部, 助教授 (60235744)
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| Co-Investigator(Kenkyū-buntansha) |
YASUDA Masahide University of Miyazaki, Faculty of Engineering, Professor, 工学部, 教授 (00174516)
MATSUMOTO Jin University of Miyazaki, Faculty of Engineering, Research Associate, 工学部, 助手 (90363572)
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| Project Period (FY) |
2004 – 2005
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| Keywords | Porphyrinatoantimony(V) / Axial ligand / Cation-exchangeable clay / Clay sheet / Composite / Non-aggregated state / Sheet structure / Photoinduced electron transfer |
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| Research Abstract |
Novel metalloporphyrin-clay composites were prepared from a synthetic clay (Sumecton SA ; SSA) and cationic tetrapheylporphyrinatoantimony(V) bromide (SbTPP) having various axial ligand. Both the crystal structure for SbTPP-SSA composites and the adsorption behaviors of SbTPP into SSA sheets were investigated regarding the relation to the structure of an axial ligand at SbTPP by measuring XRD, IR, UV-vis, and fluorescence spectroscopy. It,was clear that an axial ligand structure can control not only the formation of the crystal structure, but also the adsorption behaviors with aggregation or non-aggregation onto SSA sheets.
SbTPP dyes-adsorbed SSA nano-clay sheets films were prepared on a glass plate modified with ammonium cation (MAS-glass). The dispersibility of SbTPP-adsorbed SSA sheets strongly depended on the surface state of a glass plate. The fluorescence images emitting from the films were analyzed by a confocal laser scanning fluorescence microscope, revealing that SbTPP dyes are adsorbed onto nano-SSA sheets without their aggregation. The photochemical behavior between SbTPP and pyranine co-adsorbed onto SSA sheets was also investigated. The fluorescence of pyranine was extremely quenched with an increase of an adsorption amount of SbTPP, suggesting that the photochemical electron transfer from excited ptranine to SbTPP should occur on nano-SSA sheets. The dye-clay composites in which dye molecules adsorb without aggregation could be promising for constructing intermolecular photochemical reaction onto nano-clay sheets system.
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