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利用水热合成技术制备了基于半刚性双吡啶双酰胺配体L(N,N′-双(4-吡啶甲酰胺)-1,2-环己烷)和Keggin型多金属氧酸盐的铜功能配合物[Cu_2(L)_2(Si W_(12)O_(40))(H_2O)_8]·H_2O,并通过元素分析、红外光谱和X-射线单晶衍射方法确定了该配合物的晶体结构.结构分析表明该化合物属于三斜晶系,P1-空间群,晶胞参数a=1.153 10(10)nm,b=1.339 10(12)nm,c=1.429 40(12)nm,α=71.514 0(10)°,β=66.926 0(10)°,γ=68.111 0(10)°,V=1.846 0(3)nm~3,Z=1,R_1=0.067 3,w R_2=0.181 1.配合物由离散的[Si W_(12)O_(40)]~(4-)杂多阴离子和[Cu_2(L)2(H_2O)_8]~(4+)阳离子组成,2种结构单元间通过氢键作用形成二维超分子层结构.标题配合物修饰的碳糊电极对NO~(2-)还原有较好的电催化活性,而且该配合物对降解亚甲蓝分子有显著的光催化效率.
The copper based on the semi-rigid bipyridine bisamide ligand L (N, N’-bis (4-picolinamide) -1,2-cyclohexane) and Keggin type polyoxometallates (Cu_2 (L) _2 (Si W_ (12) O_ (40)) (H_2O) _8] · H_2O was synthesized and characterized by elemental analysis, IR and X-ray single crystal diffraction The structure analysis shows that the compound belongs to the triclinic system, P1-space group with unit cell parameters of a = 1.153 10 (10) nm, b = 1.339 10 (12) nm, c = 1.429 40 71.514 0 (10) °, β = 66.926 0 (10) °, γ = 68.111 0 (10) °, V = 1.846 0 (3) nm ~ 3, Z = 1, R_1 = 0.067 3, w R_2 = 0.181 1 The complexes consist of discrete [Si W 12 O 40] 4- (4-) heteropolyanions and [Cu 2 (L) 2 (H 2 O) 8] 4+ cations, The two-dimensional supramolecular layer structure was formed by hydrogen bonding.The title complex-modified carbon paste electrode has good electrocatalytic activity for NO ~ (2-) reduction, and the complex has significant light degradation of methylene blue Catalytic efficiency.