萘酰亚胺树枝状聚（胺-酯）荧光材料的合成及性能

Synthesis and Properties of Fluorescent Materials of Dendritic Poly(amine-ester) with Naphthalimide

摘要:

以乙二胺（EDA）、三羟甲基丙烷三丙烯酸酯（TMPTA）和l,8—萘二甲酸酐为原料，合成了萘酰亚胺树枝状聚（胺-酯） [PAE-1,8-NL]，产率为32.79%。用IR和1HNMR表征了它的结构。通过紫外—可见吸收光谱、荧光光谱等手段对PAE-1,8-NL及加入稀土金属离子(La3 、Nd3 、Dy3 、Gd3 、Eu3 ）或质子的各种溶液的光物理性能进行研究。实验结果表明，PAE-1,8-NL在氯仿-乙醇(体积比1:1)稀溶液中在激发波长为335nm激发下产生两处荧光峰370nm和386nm，分别归属为萘单体荧光峰和分子内萘基—萘基激基缔合物荧光峰；稀土金属离子或质子与PAE-1,8-NL内部的胺络合后，对萘单体荧光峰影响不大，而对激基缔合物荧光强度产生规律性的变化。PAE-1,8-NL溶液的荧光强度随稀土金属离子浓度的增大先增强后减弱；随 H 浓度的增大而增强；随稀土金属离子和H 浓度的增大先增强后减弱。

Abstract:

Poly(amine-ester)-1,8-naphthalimide dendrimer (PAE-1,8-NL) is synthesized from ethylenediamine (EDA), trimethylolpropane triacrylate (TMPTA) and 1,8-naphthalic anhydride, the yield is 32.79%. The structure of PAE-1,8-NL is charactracterized by IR and 1HNMR. The physical performance of PAE-1,8-NL with the lanthanide ions (La3 、Nd3 、Dy3 、Gd3 、Eu3 ）and hydrogen ion is studied by UV spectra and fluorescent spectra. The results show that PAE-1,8-NL in chloroform-ethanol (V:V=1:1) diluent solution excited at 357 nm appears two fluorescence peaks（370nm and 386nm）, assigning to naphthyl monomer emission and intramolecular naphthyl-naphthyl dimmer/exmier emission. The presence of the lanthanide ions and hydrogen ions is found to have a very small effect on the naphthyl monomer emission peak but it has a disciplinarian effect on the intensity of the naphthyl-naphthyl dimmer/exmier emission peak. The enhancement in the fluorescence mainly owes to photoinduced electron transfer effect. Fluorescence of PAE-1,8-NL is first increased then decreased by the lanthanide ions; increased by hydrogen ion; first increased then decreased by the lanthanide ions and hydrogen ion in the solution.