含磺酸根侧链的聚苯乙炔-吡啶类共轭聚合物的荧光传感性能  

Fluorescence Sensing Properties of Conjugated Polymer-Pyridyl Inserting Poly(phenylene ethynylene)s with Sulfonate Side-chains

作　　者：肖毅[1] 胡玉琴[1] 黄红梅[1] 尹笃林[1] 肖小明[1] 

机构地区：[1]湖南师范大学化学化工学院化学生物学及中药分析教育部重点实验室,长沙410081

出　　处：《化学学报》2011年第7期838-842,共5页Acta Chimica Sinica

基　　金：国家自然科学基金(No.20805014);湖南省自然科学基金(No.09JJ3018)资助项目

摘　　要：利用Sonogashira偶合反应合成了两种新的含磺酸根侧链的聚苯乙炔-吡啶类共轭聚合物P1,P2.通过紫外-可见吸收光谱和荧光光谱对其光学性质及Cu2+传感检测进行了研究.结果表明,按一定比例嵌段引入吡啶环的聚合物P1能有效地改善共轭主链的刚性,提高检测的灵敏度,使共轭聚合物具有更优异的荧光化学传感性能.在甲醇溶剂中,P1的荧光能被Cu2+有效地猝灭,相对单体模型分子PESO3,其响应信号扩大222倍.Two new conjugated polymers P1, P2, containing pyridine inserting poly（phenylene ethynylene）s backbone with sulfonate side chains were synthesized by Sonogashira coupling reaction. UV-Vis and fluorescence spectra were employed to study their optical properties and Cu2＋ detection. The results indicate that polymer P1 with pyridyl group entrapped in the conjugated backbone in a certain proportion could effectively modify the rigidity of the conjugated main chain and improve the sensitivity of the Cu2＋ detection. In methanol the fluorescence quenching efficiency of P1 by Cu2＋ is about 222 times greater than that of model monomer PESO3.

关 键 词：共轭聚合物 荧光猝灭 信号放大 

分 类 号：O633.5[理学—高分子化学]