| Project/Area Number |
16360334
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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 |
Inorganic materials/Physical properties
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| Research Institution | Waseda University |
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Principal Investigator |
KURODA Kazuyuki Waseda University, Faculty of Science and Engineering, Professor, 理工学術院, 教授 (90130872)
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| Co-Investigator(Kenkyū-buntansha) |
SUGAHARA Yoshiyuki Waseda University, Faculty of Science and Engineering, Professor, 理工学術院, 教授 (50196698)
下嶋 敦 早稲田大学, 理工学術院・日本学術振興会, 特別研究員(PD)
望月 大 早稲田大学, 理工学術院・日本学術振興会, 特別研究員(PD)
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| Project Period (FY) |
2004 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥14,100,000 (Direct Cost: ¥14,100,000)
Fiscal Year 2005: ¥4,000,000 (Direct Cost: ¥4,000,000)
Fiscal Year 2004: ¥10,100,000 (Direct Cost: ¥10,100,000)
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| Keywords | Inorganic-organic hybrid / Sol-gel method / Self-assembly / Ordered porous silica / オリゴマー |
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| Research Abstract |
A variety of ordered hybrid materials have been obtained by self-assembly of designed amphiphilic silicon-based precursors. Alkoxysilanes and chlorosilanes with covalently attached hydrophobic organic tails are hydrolyzed to form amphiphilic molecules containing silanol groups, leading to the formation of layered (lamellar) structures. The design of molecules having alkyl chains and large oligosiloxane heads led to the formation of mesophases consisting of cylindrical assemblies, providing a direct pathway to ordered porous silica. We also reported the synthesis of silica-based hybrids with lamellar and wormhole-like mesostructures using of 1-alkynyltrimethoxysilanes. The hybrids with wormhole-like mesostructures, prepared in the presence of TMOS, were converted into mesoporous silica either by chemical treatment or by calcination. Furthermore, we have demonstrated the formation of novel layered materials from alkoxy-derivatives of bis(trichlorosilanes) having methylene, ethylene, and phenylene bridges. On the other hand, we discovered a new class of cage-like oligomers which were selectively formed by hydrolysis and polycondensation of a methylene-bridged bistrialkoxysilane precursor in the presence of tetramethyl-ammonium hydroxide.
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