Abstract
The organic－inorganic hybrids are functional materials that organic and inorganic components are dispersed in a nanometer order. The optical use of these materials is expected, because highly transparency. In order to prepare these organic－inorganic hybrids, the formation of crosslinking is essential, and the photo-crosslinking is one of most candidates for the quickly accomplishment of organic－inorganic hybrids. Since the inorganic components are often synthesized by the sol－gel method, the simultaneous photo-crosslinking with organic components in the sol－gel reaction is the important procedure for the preparation of organic－inorganic hybrids. For example, the photo-assisted thiol-ene reaction, which was proceeded with vinyl silane coupling agent and multifunctional thiol, and the sol－gel reaction of silane coupling agent generated the organic－inorganic hybrid. Furthermore, the surface modified metal oxide nanoparticles are used as the inorganic components for the organic－inorganic hybrids. In this point of view, a high refractive index hydrid can be readily produced by photo-radical crosslinking of multifunctional acrylates and zirconia hanoparticles with methacrylic groups. It is possible to control the refractive index by the content of the zirconia nanoparticles in the hybrid thin film. In this paper, we will describe about the recent development of organic－inorganic hybrid using the photo crosslinking polymers.
