铜(Ⅱ)、镍(Ⅱ)、镉(Ⅱ)硫酸盐配位聚合物中配体配位行为的研究

Coordination Behavior of Sulphate Groups in Copper(Ⅱ), Nickel(Ⅱ),and Cadmium(Ⅱ) Coordination Polymers

通过水热合成法合成3种具有特殊结构的过渡金属配位聚合物{[Cu2(SO4)2(H2O)8].2H2O}n(1),{[Ni3(SO4)3(H2O)6].2H2O}n(2)和{[Cd3(SO4)3(H2O)6].2H2O}n(3).以元素分析、红外光谱分析、单晶X-射线衍射进行表征发现:配位聚合物中的硫酸盐基团配体各自的配位形式不同.配位聚合物1包含一维Cu—SO4链,并通过氢键相互作用延展成三维超分子结构.配位聚合物2和配位聚合物3是以硫酸盐基团为一维链的基础上建立起来的类似的三维结构.

Three unusual transition metal coordination polymers, {[Cu2（SO4）2（H2O）8]·2H2O}n（1）,{[Ni3（SO4）,（H2O）6]·2H2O}n（2）和{[Cd3（SO4）3（H2O）6]·2H2O}n（3）,were synthesized by hydrothermal methods and structurally characterized by elemental analysis, IR spectroscopy and single-crystal X-ray diffraction. The obtained complexes exhibited different coordination structures constructed of sulphate groups;Complex 1 contained a 1D Cu--SO4 chain and further extend into a 3D supramolecular architecture via hydrogen bond interactions. Complexes 2 and 3 possessed a similar 3D frame- work structure based on 1 D chains by sulphate groups.