Syntheses, Crystal Structures and Electrochemical Activities of Co(II) and Cu(II)-Complexes with 5-Aminosalicylate Derivatives
作者:Ya-Yun Zhao、Xiu-Hua Zhao、Yue Bing、Jian-Guo Pan、Xing Li
DOI:10.1007/s10870-013-0462-6
日期:2013.11
Reaction of 5-aminosalicylic acid with 2-pyridinecarboxaldehyde or sodium chloroacetate gave two new ligands 5-((pyridin-2-yl)methyleneamino)-2-hydroxybenzoic acid (HL1) and 5-(bis(carboxymethyl)amino)-2-hydroxybenzoic acid (H2L2), respectively. Two compounds [Co(L1)2(H2O)2]·2H2O (1) and [Cu2(L2)2(phen)2] (2) (phen = 1,10-phenanthroline) were synthesized and characterized by IR, PXRD, TGA and cyclic voltammetry. Single crystal X-ray diffraction analysis reveals that complex 1 is a mononuclear structure and the metal center is coordinated in an octahedral geometry. Complex 2 is a dinuclear structure, in which the Cu atom is in a square pyramidal geometry. The cobalt ion is chelated by two 5-((pyridine-2-yl)methyleneamino)-2-hydroxybenzoinates to form a mononuclear structure. The compound an electrocatalytic activity of the reduction reaction from H2O2 to H2O.
5-氨基水杨酸与2-吡啶甲醛或氯乙酸钠反应,分别得到两种新配体5-((吡啶-2-基)亚甲氨基)-2-羟基苯甲酸(HL1)和5-(双(羧甲基)氨基)-2-羟基苯甲酸(H2L2)。合成了两种化合物[Co(L1)2(H2O)2]·2H2O(1)和[Cu2(L2)2(phen)2](2)(phen = 1,10-菲咯啉),并分别通过红外光谱、粉末X射线衍射、热重分析和循环伏安法进行表征。单晶X射线衍射分析显示,配合物1是单核结构,金属中心具有八面体几何构型。配合物2是双核结构,其中铜原子具有方形锥体几何构型。钴离子与两个5-((吡啶-2-基)亚甲氨基)-2-羟基苯甲酸酯螯合形成单核结构。该化合物对从H2O2到H2O的还原反应具有电催化活性。