具有三重螺旋链的二氯苯氧乙酸铽(Ⅲ)配位聚合物的晶体结构与荧光性质

摘要

采用水热法制备了一种新型金属配位聚合物[Tb2(2,4-D)6(2,2′-bipy)2]n(1)(2,4-D=2,4-二氯苯氧乙酸；2,2′-bipy=2,2′-联吡啶),用X-衍射单晶结构分析、红外光谱分析、荧光光谱法对产物进行了结构表征。结构分析表明,标题配合物属于单斜晶系,P2(1)空间群,晶胞参数a=2．792(1)nm,b=0．851(3)nm,c=3．335(1)nm,β=113．6470(1)°,V=7．2575(5)nm3,Z=4。金属离子Tb3+处于扭变的四方反棱柱构型中,金属离子之间通过配体2,4-D的羧基的桥联作用,链接成为一维三重螺旋链状配位聚合物。配合物的荧光光谱表明,配合物有望成为潜在的绿光材料。%A novel terbium(III)coordination polymer[Tb(2,4-D)3(2,2′-bipy)]n(1)(2,4-D=2,4-dichlorophenoxyacetic acid,2, 2′-bipy=bipyridine) was prepared under hydrothermal condition,and characterized by single crystal X-ray diffraction technique,IR and fluorescence spectrum. Structural analysis discovered that complex1crystallizes in the monoclinic crystal system,P2(1) space group with crystal cell parameters:a=2. 792(1)nm,b=0. 851(3)nm,c=3. 335(1)nm,β=113. 6470(1)°,V=7. 2575(5)nm3,Z=4. The Tb3+ ion of 1is in a eight-coordinated distorted anti-square prism geometry. Complex1exhibits one-dimension triplet helix chain structure from the Tb3+ ions bridged by the carboxyl groups of 2,4-D ligands. Fluorescence analysis showed that 1 could be potential green luminescent material.