Different crystal structures and luminescent properties of zinc and cadmium coordination polymers constructed from two flexible thioether ligands with different alkyl chains
作者:Hua-Ze Dong、Jian Zhao、Shao-Hua Gou、Hai-Bin Zhu
DOI:10.1016/j.poly.2009.01.009
日期:2009.4
2 ), with zinc or cadmium salts have resulted in the interesting frameworks with structural motifs from a mononuclear macrocycle or a dinuclear macrocycle to an one-dimensional structure. A small difference of the alkyl length between L 1 and L 2 led to conspicuous changes of the fluorescent properties of both ligands and their complexes. Mainly due to the size of metal atoms, structures of [ZnL 2
摘要含氮杂环二硫醚配体,1,2-双(4-(吡啶-3-基)嘧啶-2-基硫基)乙烷(L 1)和1,3-双(4-(吡啶-3-带有锌或镉盐的基)嘧啶-2-基硫基)丙烷(L 2)形成了有趣的构架,其构架从单核大环或双核大环到一维结构。L 1和L 2之间的烷基长度的微小差异导致两个配体及其配合物的荧光性质发生明显变化。主要由于金属原子的大小,[ZnL 2 I 2](1)和[CdL 2 I 2](2)的结构从单核大环到一维骨架,ZnL 2(H 2 O)4](ClO 4)2} 2(3)和[CdL 2(H 2 O)4](ClO 4)2} 2(4)是双核大环,其中高氯酸盐阴离子可能起重要的模板作用。至于络合物5 – 8([ZnL 1 I 2] n(5),[CdL 1 I 2] n(6),[ZnL 1 2(H 2 O)4](ClO 4)2} 0.5· L 1 0.5·CH 3 OH}(7),[Cd