姜黄素苯胺希夫碱稀土配合物的光致变色性能研究

以稀土Ce，La，Nd (Ⅲ) 硝酸盐和配体姜黄素缩二苯胺Schiff碱和姜黄素缩二(4-甲基苯胺)Schiff碱，合成了六种稀土姜黄素配合物。并采用元素分析、红外吸收光谱、摩尔电导、热重-差热等方法对六种配合物进行表征，确定了所合成配合物的化学组成。研究了各种配合物的紫外-可见光谱、荧光光谱的光致变色性能和在有机溶剂中的溶致变色性能。试验表明随着光照时间的延长，配合物的紫外-可见吸收强度和荧光发射峰的强度不断减弱，峰的位置也发生了一定程度蓝移，溶液颜色变浅。停止照射，溶液恢复到光照射前的颜色，光致变色过程可以重复进行，这说明配合物具有良好的光致变色性能，消色反应遵循一级反应动力学规律。配合物在不同的溶剂中紫外-可见吸收光谱的峰强度和位置也有所不同。对配体及配合物与具有光致变色性能的姜黄素与二乙烯三胺形成的一系列配合物的光谱性质进行了比较和讨论。没有发现配体有光致变色的性质，与姜黄素二乙烯三胺所形成的一系列稀土配合物比较，具有光致变色性能配合物引入了苯胺/对甲苯胺配体基团，增大了配体的共轭面，从而引起配合物的紫外-可见吸收强度的增大和荧光发射峰面积的增加。

Photochromic Properties of Complexes of Curcumin Aniline Schiff Base with Rare Earth

Using Ce, La, Nd (Ⅲ) nitrate and a curcumin aniline schiff base and a curcumin bis (4-methyl aniline) schiff base as raw materials, six complexes were synthesized. Through the molar conductance, IR, TG-DTA and element analysis motheds, the structures of complexes were characterized. Moreover, the properties of UV-Visible spectra and photochromic properties of the complex，and the solvate-chromic performance in organic solvents were explored. The experiments showed that the complexes have good photochromic and solvate-chromic properties. The fluorescence intensity and UV-Visible spectra intensity were reduced under exposure，and the color of the complex solution became light. The complexes have different UV-Visible spectra in difference organic solvents. The relationship between photochromic properties and time was also studied.