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合成了单体1,4-双(3-磺酰化丙氧基)-2,5-二碘苯与2,6-二乙炔基吡啶,利用Heck-Sonogashira偶联反应制备了间位聚亚吡啶基亚乙炔基共轭聚电解质m-PPYPE-SO3Na,对单体以及聚合物进行了红外光谱与核磁氢谱表征.测试了该共轭聚电解质m-PPYPE-SO3Na的紫外-可见吸收光谱与荧光发射光谱.研究了该共轭聚电解质的溶液光物理性质,发现该聚电解质具有荧光发射的溶剂依赖性以及浓度依赖性,在水溶液中存在聚集.在聚合物溶液浓度为1×10-6mol/L左右时,聚集发射基本消失,说明此时在溶液中聚合物的聚集程度已经比较低.该聚电解质在水溶液中与表面活性剂之间存在一定的相互作用,加入非离子型高分子表面活性剂聚乙烯吡咯烷酮(PVP)的聚合物水溶液荧光显著增强,表明该表面活性剂破坏聚电解质的聚集.该共轭聚电解质的溶液光物理性质表明其具有成为水溶性荧光探针的应用潜力.
Synthesis of 1,4-bis (3-sulfonylated propoxy) -2,5-diiodobenzene and 2,6-diethynylpyridine, the use of Heck-Sonogashira coupling reaction meta poly Pyridylethylene ethynylene conjugated polyelectrolyte m-PPYPE-SO3Na was used to characterize the monomer and polymer by IR and 1H NMR spectra.The UV-Vis absorption spectra of the conjugated polyelectrolyte m-PPYPE-SO3Na and Fluorescence Emission Spectroscopy. The photophysical properties of the conjugated polyelectrolytes were studied. It was found that the polyelectrolytes have solvent-dependent and concentration-dependent fluorescence emission and exist in aqueous solution. When the concentration of polymer solution is 1 × 10-6mol / L or so, the aggregation emission basically disappeared, indicating that the degree of aggregation of the polymer in the solution has been relatively low at this time.The polyelectrolyte has a certain interaction with the surfactant in the aqueous solution, adding nonionic polymer surface Fluorescence of the aqueous polymer solution of the active agent, polyvinylpyrrolidone (PVP), was significantly enhanced, indicating that the surfactant disrupted the aggregation of the polyelectrolytes whose solution photophysical properties indicated its potential for use as a water-soluble fluorescent probe.