| Project/Area Number |
11450354
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
高分子合成
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| Research Institution | Japan Advanced Institute of Science and Technology |
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Principal Investigator |
KAWAKAMI Yusuke JAIST, Grad. Sch. Mater. Sci., Professor, 材料科学研究科, 教授 (80109280)
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| Project Period (FY) |
1999 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥10,800,000 (Direct Cost: ¥10,800,000)
Fiscal Year 2002: ¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 2001: ¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 2000: ¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 1999: ¥2,700,000 (Direct Cost: ¥2,700,000)
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| Keywords | polysiloxanes / polycarbosilanes / polysilanes / stereoregularity / optical activity / polycondensation / polyaddition / ring-opening polymerization / シリルリチウム / ハロシラン / 求核置換反応 / オリゴシラン / 結晶構造解析 / 円二色性スペクトル / ポリシルセスキオキサンゲル / 位置選択性 / シンジオタクチック / ポリカルボシロキサン / 含珪素高分子 / 光学活性モノマー / ジシロキサン / ポリ(シロキサン) |
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| Research Abstract |
The purpose of this research work is the development of precision synthetic method of stereoregular and optically active silicon-containing polymers and the control of their properties.
We have synthesized optically active and syndiotactic-rich polysiloxanes by application of the reactions, such as stereoselective bromination reaction and dehydrogenative polycondensation reaction between hydrosilanes and silanols, which we have developed before. We found that some silicon-containing monomers can be separated by HPLC with commercially available optically active stationary phase to become optically pure. Polyaddition and ring-opening polymerization of resulting optically pure propargylsilane and silacyclobutene gave optically active polycarbosilanes. We also synthesized optically active oligosilanes by stereoselective nucleophilic reaction of optically active silyllithium and optically active chlorosilane, and characterized their stereostrucutures by X-ray diffraction and CD spectroscopy.
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