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水溶性荧光增强共轭聚合物的合成及性能研究

DOI: 10.3724/SP.J.1105.2012.11322, PP. 453-461

Keywords: 四苯基乙烯,聚集诱导荧光增强,肝素,共轭聚电解质

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Abstract:

通过Suzuki反应将1,2-二[4-(6-溴己氧基)苯基]-1,2-二(4-溴苯基)乙烯与1,4-对苯二硼酸丙二醇酯共聚得到含有四苯乙烯基团的共轭聚合物P-0,通过后功能化得到了具有良好水溶性的聚合物P-1.通过1H-NMR、MALDI-TOF、MS和凝胶渗透色谱(GPC)对其结构进行表征.测定了P-1在水溶液中的紫外吸收光谱、荧光发射光谱以及荧光量子产率.通过P-1与小分子化合物MC-1的对比,P-1的荧光增强灵敏度优于MC-1.在P-1的溶液中分别加入沉淀剂或带有负电荷的生物大分子,两者的紫外吸收光谱与荧光发射光谱有很大的差异,通过结果对比,初步探讨了聚集诱导荧光增强的机理,经过静电作用限制苯环内旋转可以实现荧光强度的线型增长.

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