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 the polyamidoamine dendrimers modified by phenyl aldehyde

摘要:

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猝灭效应，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到时，其混合溶液的荧光强度却减小。

Abstract:

Polyamidoamine-phenyl aldehyde of G3.0 and G4.0 dendrimers were prepared with ethylenediamine as center core, methyl acrylate as branch monomer and phenyl aldehyde as terminated functional group by divergent method. The fluorescent property of polyamidoamine-phenyl aldehyde dendrimer was studied. The results showed that fluorescence of the different generation polyamidoamine-phenyl aldehyde dendrimer 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.