以丙三醇三缩水甘油醚(GTE)、丁二酸(SA)、顺丁烯二酸(MA)为原料,通过羧基与环氧结构在无催化剂条件下开环聚合制备一类具有非常规荧光发射行为的超支化聚羟基酯(PHE).使用傅里叶变换红外光谱(FTIR)、核磁共振氢谱(1 H NMR)和凝胶渗透色谱(GPC)对聚合物的结构进行表征.使用紫外-可见分光光度计(UV-Vis)和荧光分光光度计等手段对其荧光性能进行探究.结果显示,PHE表现出稳定的发光性能,随着聚合物溶液浓度的增加,其簇聚诱导发光效率获得显著增强,具有浓度增强发射及激发波长依赖性等非常规发光的典型特性,为设计非传统发光材料提供了新的思路.
Unconventional Fluorescence Emission Behaviors of Hyperbranched Polyhydroxyester
A kind of hyperbranched polyhydroxyester(PHE)with unconventional fluorescence emission behavior was prepared by the ring opening polymerization of carboxyl groups and epoxy groups under catalyst-free conditions,using glycerol triglycidyl ether(GTE),succinic acid(SA)and maleic acid(MA)as raw materials.The polymer structures were characterized by Fourier transform infrared spectroscopy(FTIR),nuclear magnetic resonance spectroscopy(1 H NMR)and gel permeation chromatography(GPC).The fluorescence properties were investigated by the ultraviolet-visible spectrophotometer(UV-Vis)and fluorescence spectrophotometer.The results show that PHE exhibits stable luminescence properties.As the concentration of the polymer solution increases,the cluster-induced luminescence efficiency of PHE is significantly enhanced.PHE has typical characteristics of unconventional luminescence such as concentration-enhanced emission and dependence of excitation wavelength,which provides a new idea for the design of unconventional luminescent materials.
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