Designed Synthesis of Colloids from Siloxane-based Building Units

开发了用于精确控制基于正庚烷的材料的分级结构的新方法。通过笼型硅氧烷低聚物的逐步硅烷化反应，合成了结构在分子水平上确定的巨型硅氧烷低聚物。采用自组装法合成了胶体硅氧烷纳米球和纳米棒。制备了可作为分级结构构建单元的高分散性介孔二氧化硅纳米粒子。以层状硅酸盐为原料，采用逆合成法合成了片状沸石。这些方法将有助于逐步构建具有分级结构的基于正庚烷的材料。

Novel methodologies for precise control of hierarchical structures of siloxane-based materials were developed. Gigantic siloxane oligomers whose structures are defined in a molecular level were synthesized by stepwise silylation of a cage-type siloxane oligomer. Colloidal siloxane nanospheres and nanorods were synthesized by self-assembly of siloxane-based block copolymers. Highly dispersible mesoporous silica nanoparticles which are useful as building blocks of hierarchical structures were prepared. The sheet-like zeolite was synthesized from the corresponding layered silicate by a retro-synthetic method. These methodologies will contribute to stepwise construction of siloxane-based materials with hierarchical structures.