Organometallic Chemistry Inside the Pore Walls of Mesostructured Silica Materials

摘要

Recently a new class of porous organic-inorganic hybrid materials was prepared through the surfactant-templated polycondensation of bridged silsesquioxane organic molecules.These new materials,which are also referred to as periodic mesoporous organosilicas (PMOs),are unique as their channel walls contain both inorganic and organic fragments.'1' These fragments are uniformly distributed within the framework by covalent bonding of two or more terminal silyl groups,which leaves the void space unoccupied after template removal.This new approach extends the field of mesoporous materials into the chemistry of channel walls.Through choice or design of the organic functionality,one may create new materials that have truly unique properties and behaviors.These embedded fragments are readily accessible for chemical reaction,thus opening the possibility of using such materials as catalysts.