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

以乙二胺(EDA)、三羟甲基丙烷三丙烯酸酯(TMPTA)和1,8-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。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335 nm激发下产生两处荧光峰370 nm和386 nm,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。

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 of which is 32. 79%. The structure of PAE-1,8-NL is characterized by means of IR and 1HNMR. The physical performance of PAE-1,8-NL with the lanthanide ions （ La^3 ＋ , Nd^3 ＋ , Dy^3 ＋ , Gd^3 ＋ , Eu^3 ＋ ） and hydrogen ion is studied by UV spectra and fluorescent spectra. The results show that two fluorescence peaks （ 370 nm and 386 nm） appear with PAE-1,8-NL in chloroform-ethanol （ volume ratio 1：1 ） diluent solution excited at 335 nm, which can be assigned to naphthyl monomer emission and intramoleeular 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 and then decreased by the lanthanide ions;increased by hydrogen ion; first increased and then decreased by the lanthanide ions and hydrogen ion in the solution.