含膦酰杂菲侧基的4-炔基苯甲酸酯对聚叠氮缩水甘油醚点击接枝反应及其聚集诱导发光增强性能

在CuI催化作用下,实现了含膦酰杂菲侧基的4-炔基苯甲酸酯(MAT4)与聚叠氮缩水甘油醚(GAP)的点击接枝反应,得到新型接枝聚合物G-M4,并由红外谱图确定了等摩尔反应.由于分子内含膦酰杂菲基团侧基之间较强的π-π和极性共同相互作用以及聚醚主链的柔顺性,使G-M4分子链内侧基之间相对空间位置比较固定,分子链构型规整,...

SYNTHESIS OF PHOSPHAPHENANTHRENE-CONTAINING 4-ETHYNYLBENZONATE GRAFTED GLYCIDYL AZIDE POLYMERS BY CLICK CHEMISTRY AND THEIR AGGREGATIONINDUCED EMISSION ENHANCEMENT PROPERTIES

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 π-π 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.