Sol-Gel Synthesis of a Nanostructured Hybrid Material from an Organosiloxane Oligomer with a Terminal Phenyl Group

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  • SHIMOJIMA Atsushi
    Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST) Kagami Memorial Laboratory for Materials Science and Technology, Waseda University
  • ATSUMI Norimasa
    Department of Applied Chemistry, Waseda University
  • UMEDA Noritaka
    Department of Applied Chemistry, Waseda University
  • FUJIMOTO Yasuhiro
    Department of Applied Chemistry, Waseda University
  • KURODA Kazuyuki
    Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST) Kagami Memorial Laboratory for Materials Science and Technology, Waseda University Department of Applied Chemistry, Waseda University

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  • 末端フェニル基を有するオルガノシロキサンオリゴマーを用いたゾル-ゲル法によるナノハイブリッド材料の合成

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A novel ordered siloxane-organic hybrid material has been prepared by hydrolysis and polycondensation of a well-defined alkoxysilane precursor consisting of a tetrasiloxane unit and a 4-phenylbutyl group (1). Evaporation-induced self-assembly during hydrolysis and polycondensation of 1 led to the formation of a two-dimensional (2D) hexagonal mesostructure, which was revealed by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Solid-state 13C CP/MAS NMR and 29Si MAS NMR confirmed that the product consisted of 4-phenylbutyl groups and siloxane networks, both of which are linked via Si-C bonds. These results will allow us to produce functional hybrid materials by chemical modification of phenyl groups, and also by incorporating other organic groups. Furthermore, calcination of this hybrid to remove organic groups led to the creation of an ordered microporous silica with the Brunauer-Emmett-Teller (BET) surface area of 570 m2 g-1 and the average pore diameter of 1.2 nm.<br>

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