苯甲醛修饰的聚酰胺胺树状大分子的合成与荧光性能研究

Synthesis and Fluorescent Properties of Polyamidoamine Dendrimers Modified by Phenyl Aldehyde

以乙二胺为中心核,丙烯酸甲酯为支化单体,苯甲醛为端基官能团合成了3.0代和4.0代两种聚酰胺胺-苯甲醛树状大分子。对其荧光性能进行了研究,结果表明,溶液中的Fe3+对不同代数聚酰胺胺-苯甲醛树状大分子的荧光具有淬灭效应,并且荧光发射峰出现了红移现象。溶液中的Zn2+对聚酰胺胺-苯甲醛树状大分子的荧光具有增强作用,但是当Zn2+与树状大分子摩尔比持续增加时,其混合溶液的荧光强度却减小。

Polyamidoamine-phenyl aldehyde of G3.0 and G4.0 dendrimers were prepared with ethylenediamine as a center core,methyl acrylate as the branch monomer and phenyl aldehyde as the terminated functional group by the divergent method.The fluorescent property of polyamidoamine-phenyl aldehyde dendrimer was investigated.The results showed that fluorescence of different generation polyamidoamine-phenyl aldehyde dendrimers was all quenched by Fe3＋ in the solution and a red shift of the fluorescent emission peak was observed also.The fluorescence of polyamidoamine-phenyl aldehyde dendrimer was increased by Zn2＋ in the solution.But the fluorescence of polyamidoamine-phenyl aldehyde dendrimer decreased when the mole ratio of Zn2＋/dendrimer continuously increased.