含ONN席夫碱和2,2'-联吡啶的铜三元配合物的合成、晶体结构及电化学性质

合成了一个新颖的含ONN席夫碱配体N-水杨醛基-2-氨乙基苯并咪唑(HL),并在甲醇体系中合成了它的配合物ICu(L)(bipy)]ClO4(bipy为2,2'-联吡啶).利用X-射线单晶衍射法测定了配合物的晶体结构.配合物Cu(L)(bipy)lClO4的晶体属于单斜晶系,C2/c空间群,a=2.585 5(8)nm,b=1.4355(5)nm,c=1.6242(5)nm,β=124.434(5)°,Z=8.在配合Cu(L)(bipy)lClO4中,每个铜离子的配位数为5,分别和配体L的1个氧原子和2个氮原子及2,2'-联吡啶的2个氮原子配位,形成畸变的三角双锥配位环境.配合物Cu(L)(bipy)]ClO4巾的氧键和π-π相互作用将配合物Cu(L)(bipy)]ClO4连接成二维网络结构.用红外光谱、紫外-可见光谱对配合Cu(L)(bipy)]ClO4进行了表征,并用循环伏安法对配合物进行了电化学性质的研究.

Synthesis, Structure and Electrochemical Properties of Ternary Copper(Ⅱ)Complex of ONN-donor Schiff Base and 2,2'-Bipyridine

The crystal structure of the complex Cu(L)(bipy)]ClO4 (HL=N-salicylidene-2-aminoethylbenzimidazole, bipy =2,2'-bipyridine) has been determined by X-ray diffraction method and refined by full-matrix least-squares methods to R =0.033 9 and wR2=0.0804 using 5079 reflections withI>2σ(I). The compound crystallizes in the monoclinic system, space group C2/c, with a=2.585 5(8) nm, 6=1.435 5(5) nm, c=1.624 2(5) nm, β= 124.434(5) and Z=8. Each Cu(Ⅱ) ion adopts distorted N4O trigonal bipyramidal coordination geometry. The hydrogen-bonding and π-π interactions extend the complex into a quasi two-dimensional networks, and such weak interactions further stabilized the complex. FTIR, UV-Vis and CV were also used to characterize the complex. CCDC: 275659.