| Budget Amount *help |
¥3,350,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥150,000)
Fiscal Year 2007: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2006: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2005: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2004: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Research Abstract |
Metal oxide is one of a popular material in high-tech world in modern society such as superconductivities, magnetic or semiconductor properties, and catalysts. When we look for the best properties of all, many of these materials are turning up to be metal oxides, and need to understand those properties from the molecular level. The synthesis of metal oxide as a molecule is seemingly easy, but is a challenge for a chemist for a long time, and unexplored world is wailing. In this study, we discover the chemistry of inorganic complex in which the oxide anion is coordinated to the metal atoms, and we proved the coordination chemistry can be expanded to the world of pure inorganic oxide chemistry. The inorganic complex was achieved by the combination of polyoxovanadates and the metal cations as Lewis acid The Lewis acidity of the metal sources prompt the condensation reaction of the metavanadate species, which is tri or tetramer in acetonitrile solution. The resulting pureinorganic complex of an, Ni(II), Cu(II), and Zn(II) have been synthesized in non-aqueous solution and various oxide molecule with crown-type oxide anion ligands were synthesized. Most of the interesting finding in this study is a discovery of the chiral inorganic molecule. When we condense the vanadate under the presence of nitrate template, we found the formation of two octadecavanadate chains through the nitrate template capped the both ends of the chain by V05 pyramidal units. In other view, the first double helical inorganic molecule had been emerged.
The new chemistry of fundamental oxide of vanadium is strategic importance, and the understanding of the variety of properties in oxide can be tackled from the point of molecular chemistry. This study explorer the chemistry of oxide molecule and many interesting formation of disk, cage, chiral oxide molecule have been realized, and further studies will provide the extention toward the functional materials.
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