基于氰苯基咪唑二羧酸的二维镍金属有机框架的晶体结构及磁性

Crystal structure and magnetic properties of a cyanophenylimidazole dicarboxylate-based 2D Ni MOF

采用有机配体2-(对氰基)苯基-4,5-咪唑二羧酸(p-CNPhH_3IDC)与六水合硫酸镍,在乙醇和水的混合溶剂中,通过溶剂热反应,制得一个新型的二维金属有机框架{[Ni(p-CNPhH_2IDC)2]·2H_2O}n。采用单晶X射线衍射表征了其晶体结构。通过X-射线粉末衍射测试了其纯度并对其在空气中的热稳定性进行了研究。2-300K范围内的变温磁化率测试表明在相邻的镍离子间存在着反铁磁偶合作用。

A new two-dimensional metal-organic framework{[Ni(p-CNPhH 2IDC)2]·2H 2O}n has been solvothermally prepared by using the newly designed multifunctional organic ligand 2-(4-cyanophenyl)-1H-imidazole-4,5-dicarboxylic acid(p-CNPhH 3IDC)to react with NiSO 4·6H 2O in ethanol and water mixed solvents.The crystal structure of title complex was characterized by single crystal X-ray diffraction.Its phase purity was confirmed by X-ray powder diffraction.The thermal stability under air has also been investigated.The variable temperature magnetic susceptibility in the range of 2-300 K shows that there exists antiferromagnetic coupling between adjacent Ni(II)ions.