Phosphaphenanthrene-containing 4-ethynylbenzonate (MAT4) was grafted to glycidyl azide polymer (GAP) by click chemistry in the presence of CuI as catalyst.FT-IR analytical results confirmed the structure of the grafting polymer (G-M4) and revealed the click reaction between GAP and MAT4 in equal molar ratio.Compared with MAT4

the UV-Vis absorbance and the photoluminescence strength of G-M4 in dichloromethylene solution are obviously increased because the formation of triazole induces the increasing of total conjugated degree.When G-M4 molecules aggregate to a certain degree in a mixture of dichloromethylene and n-hexane

the photoluminescence strength of G-M4 proportionally increases

which shows obvious aggregation-induced emission enhancement (AIEE) property because the aggregation state of G-M4 restricts the intramlecular rotation of phosphaphenanthrene groups based on the - stacking and polarity interaction between the molecules.Due to J-aggregation

supramolecular structure between triazole rings in G-M4 and phosphaphenanthrene groups in adjacent G-M4 based on donor-accept interaction is formed.When the content of n-hexane is over 70%

the photoluminescence spectra of G-M4 obviously show two peaks

which are attributed to photoluminescence emission of intra- and extra-chains of G-M4

respectively.This novel phenomenon may enable the polymer to find applications in chemosensor

optical display and rewritable optical media.