Bridged polysilsesquioxanes is a widely used organic-inorganic hybrid material. This material has a three- dimensional net-like structure

which makes the material achieve the mixture of the inorganic phase and the organic phase in the molecular level. Its properties are the combination of the two-phase nature. We can gain varieties of bridged polysilsesquioxanes with different properties by changing the type of organic phase. In this paper

we introduce the bridged polysilsesquioxanes xerogel and aerogel from the view of molecular structure

synthetic methods

representative materials and typical applications. In addition

we also introduce the history

the monomer structure and the application of a special bridged polysilsesquioxane material with periodic mesoporous structure.