双端三齿配体基La(Ⅲ)凝胶聚合物合成及性能研究

Synthesis and Properties Double-ended Tridentate Ligand La(Ⅲ) gel Polymer

摘要:

以1,6-二溴己烷和1,8-二溴辛烷与富含氮单体2,6-二苯并咪唑基-4-羟基吡啶反应制备双端三齿配体1,6-二-(2,6-(二苯并咪唑基)吡啶氧基)己烷和1,8-二-(2,6-(二苯并咪唑基)吡啶氧基)辛烷。两种配体分别与过渡金属离子La(Ⅲ)组装得到具有温度响应性和化学刺激响应的凝胶状聚合物，并具有一定的荧光效应。NMR表征表明成功的制备了单体及配体，应用TG、XRD对聚合物的性能进行测试。刺激响应性实验表明此凝胶聚合物对温度具有可逆的响应性，并对化学试剂甲酸具有化学刺激响应性。光学性能研究表明，在紫外线的照射下，聚合物具有明显的发光现象，最大发射峰都位于419 nm处。

Abstract:

Using nitrogen rich 2,6-bibenzimidazole-4-hydroxypyridine reacted with 1,6-dibromohexane and 1,8-dibromo-octane the double-ended tridentate ligand 1,6-bis-(2,6-bis(benzimidazolyl)pyridyloxy)hexane and 1,8-bis-(2,6-bis(benzimidazolyl)pyridyloxy)octane were synthesized. Temperature and chemical stimuli-responsive La(Ⅲ) polymer gel with distinct luminescence could be obtained through the ligand and metal ions self-assembly. MR spectra indicate successful synthesized the monomer and the ligand, the TG and XRD were applied to test the performance of polymer. Experiments showed that the polymer gels have reversible temperature stimuli-responsive, and chemical stimuli-responsive when added formic acid. Optical performance reach showed, under UV irradiation, the polymer gels have a distinct luminescence, and maximum emission peaks are located at 419 nm.