不同表面活性剂对共轭聚合物荧光性质及电荷转移的影响

Effects of Different Surfactants on Fluorescent Properties and Charge Transfer of Conjugated Polymer

探讨了表面活性剂存在下,水溶性阴离子共轭聚合物聚[5-甲氧基-2-(3-磺酰化丙氧基)-1,4-苯撑乙烯](简写为MPS-PPV)的微环境变化对荧光性质及电荷转移的影响.结果表明,阳离子表面活性剂及非离子表面活性剂使MPS-PPV荧光增强,阴离子表面活性剂使其荧光先增强后减弱;在MPS-PPV/表面活性剂体系中加入电子接受体Pd2+,发现非离子表面活性剂体系的荧光猝灭效率提高,阴离子及阳离子表面活性剂体系荧光猝灭效率下降.此研究对研制基于阴离子共聚物的新型生物化学传感器具有一定的指导意义.

The influence of different surfactants on fluorescent properties and charge transfer of water-soluble anionic conjugated polymer poly[5-methoxy-2-（3-sulfopropoxy）-1,4-phenylenevinylene] （MPS- PPV） was investigated. Cationic and nonionic surfactants enhanced the fluorescence intensity of MPS-PPV, while anionic suffactant firstly enhanced then reduced the intensity with the increase of its concentration. Upon adding the electron acceptor pd^2＋ into MPS-PPV/suffactant system, fluorescence quenching efficiency of pd^2＋ was increased in the presence of nonionic suffactant, but the efficiency decreased in the presence of anionic or cationic suffactant. Such studies will provide guidelines to develop the novel anionic conjugated polymer-based biological and chemical sensors.