【作者】 王旋； 王运光； 魏高宁； 林丽榕；

【Author】 Xuan Wang;Yunguan Wang;Gaoning Wei;Li-Rong Lin;Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University;

【机构】 厦门大学化学化工学院；

【摘要】 偶氮苯化合物因含有偶氮基团,在光照或者受热的条件下会发生顺反或者反顺异构化,具有良好的光致变色活性。其特殊的性质使得偶氮苯化合物在生物材料,光信息材料及光存储材料等方面有广泛的应用[1]。稀土-β二酮化合物在光致发光、电致发光及显示材料、荧光传感器、药物探针等方面具有很重要的应用[2]。为此,我们设计合成了(((4-苯基)偶氮基)苯基)-4,4,5,5,6,6-七氟己烷-1,3二酮,(4-((4-二甲胺苯基)偶氮基)苯基)-4,4,5,5,6,6-七氟己烷-1,3二酮两个配体并与La(III),Eu(III),Yb(III),Gd(III)四个稀土离子配位获得了相应的8个稀土配合物,并用熔点,元素分析,1HNMR和红外光谱进行了相应的表征,测定了其中La(III),Eu(III),Yb(III)三个配合物的晶体结构。同时研究了两个配体及其八个配合物在不同溶剂及PMMA膜中的光致紫外吸收光谱,发现引入给电子基团会降低配体以及稀土配合物的光致变色性能,Yb(III)配合物具有相对较好的光致变色性质及良好的稳定性能,有可能成为一种可以利用的光学材料。更多还原

【Abstract】 Novel azobenzene-derivated tris-b-diketonates were designed and their complexes with lanthanide cations Ln（III）(La³⁺, Eu³⁺, Gd³⁺, Yb³⁺) were prepared and characterized by 1HNMR, FT-IR, and elemental analysis. Three of the complexes were crystallized successfully and identified by X-Ray diffraction. It was significant to find that the ligand without bearing the electron donor showed remarkably reversible tran-to-cis isomerization property. The presence of Ln（III） enhanced the reversible tran-to-cis isomerization properties of both ligands a little upon photoirradiation in organic solvents. In addition, the complexes doped in polymethyl methacrylate（PMMA） films produced the similar phenomenon as well as that in solution. The excellent reversible photoisomerization property of the newly designed Ln（III） complexes can offer important advantages that help with further study of these materials into their full potential such as molecular switching devices.更多还原