柔性双吡啶配体的同质异构配位聚合物的合成及结构

Synthesis and Structure of Isomeric Coordination Polymers with A Flexible Bipyridyl Ligand

设计合成的柔性双吡啶基对苯二胺配体在I-离子存在下与Cd^(2+)反应,通过pH、温度等条件的控制,合成了两个同质异构的配位聚合物。X-射线单晶衍射表明,两种配位聚合物均为一维结构,具有相同组成。在结构上,Cd~Ⅱ金属节点均为四面体的配位模式,配体则表现出不同的空间构象。低温时,配体以之字形构象桥连金属,高温及酸性条件下,则同时存在之字形及直线两种构象,展现出了柔性配体在构筑金属有机配位聚合物的特殊优势。

The flexible bipyridyl p-phenylenediamine ligand was designed and synthetized, which reacted with Cd2~ to construct two isomeric coordination polymers in the presence of iodide ions by controlling the conditions of pH and both zigzag and linear were conformed in acidic solution at the high temperature. That showed particular advantages of flexible ligands in the construction of metal-organic coordination polymers.