Synthesis, crystal structures and fluorescence properties of coordination polymers based on tetrahedral ligands and secondary bidentate linkers
作者:Jia Wei、Ting Zhou、Yuxiang Zuo、Wei-Wei Cheng、Mei-Pin Liu、Rong-Rong Bian、Ning-Ning Chen、Yun-Shan Xue、Jian-Qing Tao
DOI:10.1007/s11243-018-0239-z
日期:2018.9
Two coordination polymers, namely [Co2L(dpe)2]·0.42H2O} (1), and [Zn4L2(dpe)4]·4H2O} (2), were solvothermally prepared from a flexible tetrapodal ligand tetrakis[(3-carboxyphenyl)oxamethyl]methane acid (H4L) and a secondary bidentate linker (E)-1,2-di(pyridin-4-yl)ethane (dpe). Single-crystal X-ray diffraction analysis revealed that these compounds possess similar three-dimensional structures, in
两种配位聚合物,即[Co2L(dpe)2]·0.42H2O}(1)和[Zn4L2(dpe)4]·4H2O}(2),是由柔性四足配体tetrakis[(3-羧苯基)氧杂甲基]甲烷酸(H4L)和二级双齿接头(E)-1,2-二(吡啶-4-基)乙烷(dpe)。单晶 X 射线衍射分析表明,这些化合物具有相似的三维结构,其中骨架由双核 SBU(二级构建单元)[M2(COOR)4N4](M = Co 或 Zn)和四面体 L4 构成- 链接器。根据拓扑分析,这两种化合物的整体结构可以描述为 (4, 6)-连接的双节点网络,Schläfli 符号为 42537}4255647282}。化合物2在室温下表现出强烈的光致发光,峰值在422 nm(激发在370 nm),最有可能来自配体内和/或配体间电荷转移 (LLCT)。化合物 2 的发射被 Fe3+ 离子有效猝灭,表明 2 可以用作 Fe3+ 的荧光传感器。