| Project/Area Number |
23750148
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Functional materials chemistry
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
NAKAZONO Kazuko 東京工業大学, 男女共同参画推進センター, 助教 (30467021)
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| Co-Investigator(Renkei-kenkyūsha) |
TAKATA Toshikazu 東京工業大学, 大学院理工学研究科, 教授 (40179445)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | ロタキサン / フォルダマー / らせん / 分子スイッチ / 分子素子 / キラリティー / π共役系高分子 / 分子認識 |
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| Research Abstract |
Helical polymers with a large cavity formed by the folding of linear polymers, foldamer, are an interesting class of helical molecules because one-handed helical foldamers have a characteristic asymmetric cavity and groove that can recognize and accommodate chiral/achiral guest molecules. Therefore, controlling the structure of these helical foldamers is of significance. In our studies on, we found that a rotaxane switch is useful in controlling the reversible helicity of polymers via through-space chirality transfer. Switchable pendant rotaxane-tethering poly(m-phenylene diethynylene) induced a one-handed coil-shape helix only when the optically active wheel approaches the main chain. Control of the distance between the optically active group and the main chain by the rotaxane switch is crucially important for the transfer of chiral information. We demonstrated the rotaxane switch protocol to the reversible control of a helix-random coil transition of poly(m-phenylenediethynylene).
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