树枝状聚（胺-酯）的功能化及其荧光性能研究

以乙二胺(EDA)、三羟甲基丙烷三丙烯酸酯(TMPTA)和苯甲醛(BZA)为原料,合成了聚(胺-酯)-苯甲醛树枝状大分子(PAE-BZA),产率为60.82%,色谱纯度为65.27%。用IR、1HNMR和13CNMR表征了它的结构;并测定了PAE-BZA的荧光性能;考察了不同浓度PAE-BZA、不同溶剂及n(Sn2+)/n(PAE-BZA)对其荧光性能的影响。结果表明,丙酮为溶剂时,0.5 mmol/L PAE-BZA荧光强度最强;以丙酮、甲醇、DMSO、DMF和乙醇等为溶剂,PAE-BZA在乙醇中的荧光强度最强。随着n(Sn2+)/n(PAE-BZA)增加,PAE-BZA的荧光强度先减弱后增强,且Sn2+与PAE-BZA络合顺序是由外围的N原子逐步向内部的N原子络合。

Study on functionalization and fluorescence properties of dendritic poly(amine-ester)

Poly(amine-ester)-benzaldehyde dendrimer(PAE-BZA) is synthesized from ethylenediamine(EDA),trimethylolpropane triacrylate(TMPTA) and benzaldehyde(BZA),the yield is 60.82%,the chromatogram purity is 65.27%.The structure of PAE-BZA is characterized by IR、1HNMR and 13CNMR.The effects of different concentrations,different solvents and Sn2+on fluorescence properties of the dendrimer are investigated.When acetone is solvent,fluorescence of 0.5 mmol/L PAE-BZA is the strongest.Take acetone,the methyl alcohol,DMSO,DMF and ethyl alcohol as solvent,fluorescence of PAE-BZA in ethyl alcohol is strongest.Fluorescence of PAE-BZA is first decreased then increased by Sn2+ in the solution,and the complexing order of N atom is from periphery to internal.