4-氨基-3,5-二(4-吡啶基)-1,2,4-三唑为桥联配体的铜(Ⅱ)、铜(Ⅰ)配位聚合物的合成、晶体结构及磁性研究

Synthesis,Crystal Structure and Magnetic Properties of New Cu(Ⅱ) and Cu(Ⅰ) Coordination Polymers Employing 4-Amino-3,5-bis(4-pyridyl)-1,2,4-triazole as a Bridging Ligand

以4-氨基-3,5-二(4-吡啶基)-1,2,4-三唑(bpt)为桥联配体,分别与Cu(CH_3CO_2)_2·H_2O和CuCl_2·2H_2O进行水热反应得到两个新的配位聚合物{[Cu(CH_3CO_2)_2(bpt)]·2H_2O}_n(1)和[CuCl(bpt)]_n(2),并对其进行了元素分析、红外光谱及X-射线单晶结构分析表征.结果表明,配合物1通过bpt桥联成一维无限链状结构,而配合物2中相邻亚铜离子通过Cl^-桥连成一维之字链状结构,再通过bpt配体连接形成二维结构.变温磁化率研究结果表明,在配合物1中,铜离子间存在着弱的反铁磁相互作用,理论拟合值J=-0.87 cm^(-1),g=2.01.

Using 4-amino-3,5-bis （4-pyridyl）-1, 2,4-triazole （bpt） as ligand, two new coordination polymers {[Cu（CH3CO2）2（bpt）]·2H2O}n（1） and [CuCl （bpt）]n （2） were synthesized and characterized by elemental analysis, IR spectroscopy and X-ray crystal structure anal- ysis. Complex 1 exhibited a 1D polymeric chain, which bridged by bpt. In complex 2, neighboring Cu （ I ） connected each other through the Cl^-, which was further bridged by bpt to form a 2D square grid polymeric structure. Magnetic measurements in the range 2-300 K had shown weak antiferromagnetic interaction between the adjacent Cu（ II） ions, the best fittings to the experimental magnetic susceptibilities gave J= -0.87 cm^-1, g=2. 01 for 1.