Development of a molecular function enabling one to take mechanical works from the piston-like molecular motion.
| Project/Area Number |
24550142
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Functional materials chemistry
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | フォトクロミズム / キラリティー / 液晶 / 分子機械 / アゾベンゼン / 面性不斉 / ねじり力 / キラル化合物 / 光異性化反応 / 回転モーター / 光エネルギー変換 |
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| Outline of Final Research Achievements |
We aimed the development of a molecular function of a crank-shaft with which we can take the mechanical work out from the photochromic reaction (piston motion). We found out some photoresponsive chiral dopants for liquid crystals showing the change in a large helical twisting power upon photoirradiation. When some of them are doped, the motion of liquid crystal texture showed a hysteresis between forward and backward photoisomerization of the dopant by UV and visible irradiation, respectively. As the result we could attain a molecular crank-shaft function. We also developed some achiral compounds transformable to chiral form by the action of light. If we use a circular polarized light we obtained the chiral molecule with an enantio excess from the achiral compound. On the mechanism of the crank-shaft effect we explained the phenomenon with the contribution of a more disordered molecular alignment of the dopant upon backward photoisomerization.
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Report
(4 results)
Research Products
(5 results)
