姜黄素稀土大环配合物的光致变色性能研究

摘要

Rare earth macrocylic complexes of double-double of curcumin reduction diethylenetriamine (L) have been synthesized by the template reaction and have been characterized by 1H NMR, IR, thermal analysis, molar conductivity and element analysis. Their compositions were confirmed as following: [LnL(NO3)3]·4H2O (Ln=La, Ce, Pr, Nd, Sm, Eu, Dy). The fluorescent properties of these complexes were studied at room temperature and shown the characteristic emissions of curcumin. Through research of photochromic of these complexes, it was found the complexes show good photochromic. Moreover, the photochromic property of the complexes was studied by the methods of steady state and time dependent fluorescence spectra. The structure of ligand in complex changed from -NH- to =N- under light. The influence of solvent on the photochromic property of the complexes was also investigated.%通过模板反应,以姜黄素和二乙烯三胺为配体合成了一系列的双姜黄素缩双二乙烯三胺(L)稀土大环配合物.并用核磁共振氢谱、红外光谱、热重-差热、摩尔电导和元素分析进行了表征.确定配合物的组成为:[LnL(NO3)3]·4H2O(Ln=La,Ce,Pr,Nd,Sm,Eu,Dy).研究了配合物在室温下的荧光性质,结果表明配合物表现出相应姜黄素的特征发射.实验表明配合物具有良好的光致变色性能,并用稳态和时间相关荧光光谱对配合物溶液的光致变色行为进行了研究.在光照下,配合物分子中的配体结构由烯胺式变为亚胺式,溶剂对配合物光致变色性质的影响也进行了探讨.