| Project/Area Number |
16550048
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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 |
Inorganic chemistry
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| Research Institution | Kyushu University (2005-2007)
Hokkaido University (2004) |
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Principal Investigator |
ABE Masaaki Kyushu University, Graduate School of Engineering, Associate Professor (90260033)
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| Project Period (FY) |
2004 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥3,710,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥210,000)
Fiscal Year 2007: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2006: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2005: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2004: ¥1,300,000 (Direct Cost: ¥1,300,000)
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| Keywords | Ruthenium / Surface / Layered structures / Proton-coupled electron transfer / Dinuclear complexes / Trinuclear complexes / Porphyrin / Corrin complexes / 自己集合化単分子層 / 固液界面 / ルイス酸 / ポテンシャル勾配 / 多核錯体 / 金属クラスター / ボトムアップ / 配位子置換 / 酸化還元 / ポルフィリン配位子 / レニウム錯体 / 金電極 / 自己組織化 / 単分子膜 / 多層膜 / 光誘起反応 |
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| Research Abstract |
This project has explored synthesis and characterizations of new potential-gradient molecular architectures where multiple units of redox-active moieties (including multinuclear complexes and organic ligands)are built up on Au electrode surfaces in a well-defined sequence. Here we have focused on the construction of molecular systems in which two different metal-cluster units are linked by a bridging ligand on a surface of Au(111) electrode. The hetero-molecular layers have been prepared by immersing an Au (111) electrode covered with the H_2O-terminated triruthenium SAM into a CH_2Cl_2 solution of a new ruthenium dimer. Here, the Ru_3 unit(bottom layer)and the Ru_2 unit (upper layer) are linked with 4,4'-bpy. Owing to the nature of proton-coupled electron transfer reaction in the ruthenium dimer, it was demonstrated that the potential gradient of molecular wire was controlled by pH of the electrolyte media in a reversible manner. Direct and facile immobilization of a solvent-terminated new diruthenium complex onto organic SAM was also demonstrated. For the triruthenium complex SAM, we examined electrolyte anion effects in redox potentials, reactivity of Ru_3 SAM with gaseous molecules such as CO and NO,^3 and photoreactivity. Another achievement in this project was a successful synthetic incorporation of a series of terapyrrol ligands and their metal complexes into the triruthenium complex.
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