基于配合物配体策略的Cu-Cd异核配位聚合物的合成与晶体结构

Synthesis and Crystal Structure of a Cu-Cd Heterometallic Coordination Polymer Constructed from Complex Ligand

利用小分子配合物[Cu(2-mpac)2(H2O)]·3H2O(1)作为配合物配体,以其两侧未配位的羰基氧原子与金属配位合成了一个Cu-Cd异核配位聚合物[Cu(2-mpac)2(H2O)2Cd(H2O)4(NO3)2]n(2)(2-mpac=5-methyl-2-pyrazinecarboxylic acid),并利用元素分析、红外光谱以及X射线单晶衍射法对标题化合物进行了表征.晶体学数据:三斜晶系,P-1空间群,a=0.7654(7)nm,b=0.8903(8)nm,c=0.9745(9)nm,α=116.116(1)°,β=98.408(1)°,γ=90.335(1)°,V=0.5880(9)nm3,Z=1,S=1.053,最终残差因子[I>2σ(I)]R1=0.0280,wR2=0.0718,对于全部数据R1=0.0305,wR2=0.0741.

Taking [Cu（2-mpac）2（H2O）]·3H2O（2-mpac=5-methyl-2-pyrazinecarboxylic acid） （1） as the ligand of a complex, a novel Cu-Cd heterometallic coordination polymer, [Cu（2-mpac）a（H2O）2Cd（H2O）4- （NO3）2]n （2） has been successfully synthesized and structurally characterized by an X-ray single crystal diffraction method. Crystal data： triclinic, space group P-1, a=0.7654（7）nm,b=0.8903（8）nm,c=0.9745（9）nm,α=16.116（1）°,β=98.408（1）°,7=90.335（1）°,V=0.5880（9）nm^3,s=1.053, final R indices [I〉2σ（I）] R1 =0.0280, wR2=0.0718, for all reflections R1 =0.0305, wR2=0.0741. In addition, elemental analysis and IR characterization were presented.