基于含氮羧酸配体构筑的钴配合物的合成、结构及光催化降解性能研究

Synthesis,structure and photocatalytic degradation of a cobalt compound based on a nitrogen carboxylic acid ligand

以氯化钴和含氮羧酸配体2-(3-吡啶基)-1H-咪唑-4,5-二羧酸为原料,用水热合成法,通过控制温度、pH和反应物的配比等条件,得到了一个新的二维层状的配位化合物Co(HL)(H2O)(H3L=2-(pyridinium-3-yl)-1H-imidazole-4,5-dicarboxylic acid).用X射线单晶衍射、红外光谱和热重分析对该化合物进行了结构表征.结果表明,该化合物属于正交晶系,P 21空间群,晶胞参数a=0.6676(5)nm,b=0.8436(5)nm,c=1.7806(5)nm,V=1.0028(1)nm^3,Z=4,R1=0.0403,wR2=0.0818,该化合物对罗丹明B的光降解有一定的催化作用.

By using cobalt chloride and 2-(pyridinium-3-yl)-1H-imidazole-4,5-dicarboxylic acid as starting materials,a new 2D layer coordination compound,Co(HL)H2O(H3L=2-(pyridinium-3-yl)-1H-imidazole-4,5-dicarboxylic acid),has been synthesized under hydrothermal conditions.The compound is successfully prepared by controlling temperature,pH and molar ratio.The structure is characterized by single crystal X-ray analysis,IR spectra and thermogravimetric analysis.The results show that it belongs to orthorhombic system,P 21 space group with a=0.6676(5)nm,b=0.8436(5)nm,c=1.7806(5)nm,V=1.0028(1)nm^3,Z=4,R1=0.0403,wR2=0.0818.The compound can be served as a catalyst for the degradation of Rhodamine B.