Polysiloxanes with aggregation-induced Emission(AIE) have non-traditional conjugated groups

and silicon imparts excellent photophysical properties and outstanding biocompatibility. In recent years

we have reported a series of hyperbranched and linear polysiloxanes containing double bonds

hydroxyl groups

amine groups and epoxy groups

and found some variety rules between the luminescence properties and its structure of polysiloxanes. However

it is still a challenging to explore the emission mechanism and reveal the relationship between structure and luminescence properties of polysiloxanes. In this paper

a series of factors affecting the luminescence properties of polysiloxane are discussed

and its emission mechanism is explained by density functional theory (DFT) and time-dependent density functional theory (TD-DFT)

then the concept of "Silicon Bridge Enhanced Emission" (SBEE) is proposed. At last

the polysiloxanes application is described briefly

and the future research directions of polysiloxanes are pointed out.