Porous organic polymers (POPs) are a new type of multi-dimensional porous materials

which are constructed via the strong covalent bond linkage of pure organic building groups with different topologies. Owning to their advantages of light-weight

large specific surface area

excellent stability

pre-designable structure

precise tunable function and so on

POPs have been applied in the field of catalysis

gas storage/separation

sensing

etc. The research of POPs is mainly concentrated in covalent organic frameworks (COFs)

conjugated microporous polymers (CMPs)

polymers of intrinsic microporosity (PIMs)

hyper-crosslinked polymers (HCPs)

etc. Compared with the linear polymers and small molecular monomers

owning to POPs’ stack skeleton

rich π-electrons and expanding of conjugated structure

POPs have greater properties of light absorption and synergy. The porous nature of POPs

such as high specific surface area and large pore volume

is not only conducive to the entry of guest molecules

but also beneficial to the transmission of electrons. Therefore

they have high photosensitivity and have outstanding performance in the field of fluorescence sensing. This article briefly reviewed research progress of POPs as a fluorescent probe in the detection of heavy metal ions

specific anions

nitroaromatic explosives and other aspects

and puts forward the existing problems in the research of functional POPs in the fluorescent probe and facing the opportunities and challenges in the future.