水热条件下合成了2,2’-联吡啶(2,2’-bipyridine=2,2'-bipy)与Ag(Ⅰ)及PW12O403-,SiW12O404-形成的配合物{ [Ag3 (2,2'-bipy)4 (PW12O40)] ·2H2O}n (1),{ [Ag4 (2,2'-bipy)6](SiW12O40)}n(2)和{[Ag2 (2,2'-bipy)3]2 (SiW12O40)}n(3).通过元素分析和红外光谱、X-射线单晶衍射对其组成和结构进行了表征.晶体结构分析结果表明:产物的结构是由多酸离子的电荷调控的;并发现这3种配合物中都存在2,2'-bipy的桥式配位模式;本研究详细总结和探讨了2,2'-bipy的桥式配位模式存在的体系及其可能原因.
Three complexes,{ [Ag3 (2,2'-bipy) 4 (PW12 O40)]· 2H2O}n (1),{ [Ag4 (2,2'bipy) 6] (SiW12O40) }n (2) and { [Ag2 (2,2'-biPy) 3]2 (SiW12 O40) }n (3) (2,2'-bipyridine =2,2'-bipy) were synthesized under hydrothermal condition.The complexes were characterized by elemental analysis,IR spectra and X-ray single crystal diffraction.Single-crystal X-ray diffraction analysis reveals that the complexes all containing unusual 2,2'-bipy acting as a bridging ligand and their structures were controlled by the charge of polyoxometalate.The possible causes of 2,2'-bipy acting as a bridging ligand are also discussed in detail.