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采用相同条件的液相层置法将Zn~(2+)、Cd~(2+)的硫酸盐与配体N-(1-亚甲基-4-吡啶基)-1,4-苯二胺((E)-N1-(pyridin-4-ylmethylene)benzene-1,4-diamine,pbda))反应,形成配合物[Zn2(pbda)2(H2O)8]·2SO4(1),[Cd(pbda)_2(H_2O)_2(SO_4)]_n(2),通过红外光谱、X射线单晶衍射对其组成和结构进行了表征,然后测试了单体和配合物的荧光性质.晶体结构的分析结果表明:配合物的结构由金属离子的半径调控;尽管Cd2+的离子半径显著大于Zn2+,但其合成的配合物的中心金属离子的配位数均为6,而配位方式和结构却完全不同;半径较大的金属离子更倾向于形成较高维数的结构;两者结构的不同导致其荧光性质存在着显著的差异.
The Zn ~ (2 +), Cd ~ (2+) sulfate and the ligand N- (1-methylene-4-pyridyl) -1,4- (Zn2 (pbda) 2 (H2O) 8] · 2SO4 (1), [Cd (Ⅱ) (pbda) _2 (H_2O) _2 (SO_4)] _ n (2) were synthesized and their compositions and structures were characterized by IR and X-ray single crystal diffraction. Then the fluorescence properties of the monomers and complexes were tested. The results show that the structure of the complex is controlled by the radius of the metal ions. Although the ionic radius of Cd2 + is significantly larger than that of Zn2 +, the coordination number of the central metal ions in the complex is 6, but the coordination mode and structure are completely Different; larger radius of the metal ions are more inclined to the formation of higher-dimensional structure; the difference between the two structures led to the fluorescence properties of significant differences.