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以N-甲基咪唑(min)为配体,采用离子热方法在离子液体(1-乙基-3-甲基咪唑溴盐)中合成了Co(Ⅱ)配合物{[Co(mim)6]Br2.2H2O,1},其结构经IR和元素分析表征。X-射线单晶衍射分析表明:1属单斜晶系,P21/c空间群,晶胞参数:a=0.8182(2)nm,b=1.3573(2)nm,c=1.6234(19)nm,β=111.12(4)°,V=1.682(5)nm3,Dc=1.476g.cm-3,F(000)=762,Z=2,μ(MoKα)=2.927mm-1,R1=0.0368,R2=0.0989。在1的晶体结构中,钴(Ⅱ)与配位原子形成畸变的八面体结构。采用循环伏安法研究了1在水溶液中的电化学性质,结果表明1中存在一对可逆的氧化还原峰,其峰值分别为0.51V和0.25V,为Co(Ⅱ)/Co(Ⅲ)间的相互转化。
The Co (Ⅱ) complex {[Co (mim) 6] was synthesized by ionic thermal method using ionic liquid (1-ethyl-3-methylimidazolium bromide) ] Br2.2H2O, 1}, its structure was characterized by IR and elemental analysis. X-ray single crystal diffraction analysis shows that: 1 is a monoclinic, P21 / c space group with unit cell parameters of a = 0.8182 (2) nm, b = 1.3573 β = 111.12 (4) °, V = 1.682 (5) nm3, Dc = 1.476g.cm-3, F000 = 762, Z = 2 and μ MoKα = 2.927mm- R2 = 0.0989. In the crystal structure of 1, cobalt (Ⅱ) forms a distorted octahedral structure with the coordination atoms. The electrochemical properties of 1 in aqueous solution were investigated by cyclic voltammetry. The results showed that there was a pair of reversible redox peaks in 1 with peak values of 0.51V and 0.25V, respectively. The results were in the range of Co (Ⅱ) / Co (Ⅲ) Mutual conversion.