论文部分内容阅读
利用烟酸与异烟酸两种配体分别与硝酸钴在N,N-二甲基甲酰胺(DMF)中采用溶剂热法合成了三种新的配位聚合物[Co2(μ2-H2O)(nicotinic acid)4·(DMF)](1),[Co2(isonicotinic acid)4·(DMF)](2),[Co(isonicotinic acid)2·(DMF)](3),并利用单晶X射线衍射(XRD)和元素分析获得其结构信息.通过傅里叶变换红外(FTIR)光谱、粉末X射线衍射(XRD)、热重分析(TGA)和比表面积分析等手段对结构中孔道的热稳定性进行了表征.结果表明化合物1具有类金刚石的拓扑结构,结构中含有稳定的一维(1D)孔道空间.化合物2和3是以异烟酸为配体,分别在100和160°C下合成,二者结构中配体以完全不同的方式与Co(II)配位,从而使其具有不同的结构.化合物2和3的一维孔道在热处理脱附DMF分子的过程中不能稳定存在.
Three novel coordination polymers [Co2 (μ2-H2O)] have been synthesized by the solvothermal method using nicotinic acid and isonicotinic acid respectively with cobalt nitrate in N, N-dimethylformamide (DMF) (2), [Co2 (isonicotinic acid) 4 (DMF)] (2) and [Co X-ray diffraction (XRD) and elemental analysis were used to obtain the structural information.The pore structure of the pores in the structure was characterized by Fourier transform infrared spectroscopy (FTIR), powder X-ray diffraction (XRD), thermal gravimetric analysis (TGA) and specific surface area analysis The results show that compound 1 has a diamond-like topology with a stable one-dimensional (1D) pore space.The compounds 2 and 3 are isonicotinic acid ligands at 100 and 160 ° C, the ligands in the two structures are coordinated with Co (II) in completely different ways, so that they have different structures.The one-dimensional pores of compounds 2 and 3 can not be stabilized during the heat treatment of desorbing DMF molecules exist.