铀-钾异核配位聚合物的合成及晶体结构

在水热反应条件下合成了1种新颖的U(Ⅵ)-K异核配位聚合物[UO2K2(pdc)2(H2O)3]n(H2pdc=吡啶-2,6-二羧酸),通过元素分析、红外、紫外光谱及热重对该配合物进行了表征。单晶结构表明:配合物属于单斜晶系,C2/c空间群;晶胞参数分别为a=1.888 5(6)nm,b=1.490 0(5)nm,c=0.740 2(2)nm,β=111.104(10)°。中心铀及钾原子通过2个氮原子和6个氧原子与吡啶-2,6-二羧酸配体结合。不同的[UO2K2(pdc)2].3H2O单元通过氧原子桥联组成三维链状配位聚合物。配位聚合物中存在π…π相互作用及氢键作用。

Synthesis, Crystal Structure of Uranium-Potassium Heteronuclear Coordination Polymer

A novel U(Ⅵ)-K heteronuclear coordination polymer UO2K2(pdc)2· 3H2O (H2pdc=pyridine-2,6-dicarboxylic acid) has been synthesized hydrothermally and determined by means of IR, UV and X-ray single-crystal diffraction methods. The single-crystal X-ray analysis of the complex reveals that the crystal belongs monoclinic, space group C2/c with a=1.888 5(6) nm, b=1.490 0(5) nm, c=0.740 2(2) nm,β=111.104(10)°. The centered uranium atom and 3H2O] units are bridged by oxygen atoms to form three-dimensional chain coordination polymer. In addition, there