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以氯化铜和烟酸(Hnic)为原料,在水热条件下得到了一个配位聚合物[Cu2(nic)4(H2O)]n(1),并利用元素分析、红外光谱以及X-射线单晶洐射对其进行了表征。该晶体属单斜晶系,P21/c空间群,a=1.071 56(3)nm,b=1.958 79(6)nm,c=1.379 50(3)nm,β=104.498(2),V=2.803 31(13)nm3,Dc=1.501 g.cm-3,Z=4,F(000)=1 280,Goof=1.014,R1=0.041 7,wR2=0.113 2。单晶结构分析显示,相邻的2个Cu(Ⅱ)离子通过2个羧基和1个水分子体桥联形成双核铜单元,双核铜单元再通过烟酸配体连接形成五连接的三维(44.66)结构的金属有机骨架。变温磁化率研究显示,双核单元内铜离子之间存在反铁磁相互作用。
A coordination polymer [Cu2 (nic) 4 (H2O)] n (1) was obtained under hydrothermal conditions using cupric chloride and nicotinic acid (Hnic) as raw materials. Elemental analysis, It was characterized by ray single shot. The crystal belongs to the monoclinic system with a = 1.071 56 (3) nm, b = 1.958 79 (6) nm, c = 1.379 50 (3) nm and β = 104.498 2.803 31 (13) nm3, Dc = 1.501 g.cm-3, Z = 4, F (000) = 1 280, Goof = 1.014, R1 = 0.041 7, wR2 = 0.113 2. Single crystal structure analysis shows that two adjacent Cu (Ⅱ) ions are bridged by two carboxyl groups and one water molecule to form dinuclear copper units, which are connected by nicotinic acid ligand to form five-connected three-dimensional (44.66 ) Structure of the metal organic framework. The study of the temperature-dependent magnetic susceptibility shows that antiferromagnetic interaction exists between the copper ions in the binuclear unit.