二维钴配位聚合物[CoL_2(H_2O)_2]_n的合成及其晶体结构

Synthesis and Crystal Structure of Two Dimensional Cobalt(Ⅱ) Coordination Polymer [CoL_2(H_2O)_2]_n

用水热法合成了新型的二维钴配位聚合物{[CoL2(H2O)2]n(1,HL=1H-苯并三唑-1-乙酸)},其结构经IR,元素分析和X-射线单晶衍射表征。1属于单斜晶系,空间群P2(1)/c,晶胞参数a=16.367(3),b=6.8942(14),c=7.7074(15),α=90.00°,β=90.12(3)°,γ=90.00°,V=869.7(3)3,Z=2,Dc=1.708g.cm-3,μ=1.039mm-1,F(000)=458,R1=0.0548,wR2=0.1482。1中Co2+与4个L配体上的4个O原子和2个配位水上的2个O原子配位,形成一个理想的八面体几何构型。在a轴方向,Co2+经L桥联形成一维波浪状链,链与链之间又通过Co-O(L)配位键,氢键以及π┈π堆积相互作用形成二维超分子结构。

A novel two dimensional Co（Ⅱ）complex,[CoL2（H2O）2]n（1,HL=1H-benzotriazole-1-acetic acid）,was synthesized by hydrothermal method.The structure was characterized by IR,elemental analysis and single-crystal X-ray diffraction analysis.1 belongs to monoclinic,space group P2（1）/c with a=16.367（3）,b=6.894 2（14）,c=7.707 4（15）,α=90.00 °,β=90.12（3）°,γ=90.00°,V=869.7（3）3,Z=2,Dc=1.708 g·cm-3,μ=1.039 mm-1,F（000）=458,R1=0.054 8,wR2=0.148 2.The Co atom is six-coordinated with ideal octahedral coordination geometry by four carboxylate oxygen atoms from four different L ligand and two oxygen atoms from two coordinated water molecules.The Co2＋ is bridged by the L ligand into a wavy chain,which is further linked into two dimensional supramolecular structures by Co-O（L）coordination bond,hydrogen bond and π┈π stacking interactions.