Salamo型三核钴(Ⅱ)配合物的合成、晶体结构及荧光性质研究

Synthesis,Crystal Structure and Fluorescent Properties of Salamo-type Trinuclear Co(Ⅱ) Complex

合成了一个新的Salamo型双肟配体2,2′-[乙二氧双(氮次甲基)]二萘酚(H2L)及其三核钴(Ⅱ)配合物[Co3(L)2Cl2],通过元素分析、红外光谱、紫外-可见吸收光谱、荧光光谱和X-射线单晶衍射法等对配合物进行了表征.结果表明:在钴(Ⅱ)配合物中,Co1形成了五配位的扭曲四方锥构型;Co2形成了六配位的八面体几何构型.该配合物通过分子间的氢键作用形成了二维和三维的超分子结构.Hirshfeld表面分析证明了分子内短程作用对配合物稳定性的贡献.钴(Ⅱ)原子配位后,配合物的荧光强度有所减弱.实验数据有助于进一步开展Salamo型配合物的光学性质的研究.

A new trinuclear Co(Ⅱ)complex,[Co3(L)2Cl2]is synthesized by the Salamo-type bisoxime chelating ligand of 2,2′-[ethylenedioxybis(nitromethylene)]dinaphthol(H2L).The Co(Ⅱ)complex is characterized by elemental analyses,FT-IR,UV-Vis spectra,fluorescence spectra and X-ray crystallography.The results show that,in the Co(Ⅱ)complex,the coordination numbers of the Co1 and Co2 atoms are 5 and 6 respectively,and Co1 forms a distorted tetragonal conic configuration while Co2 forms a octahedron geometry.The Co(Ⅱ)complex forms an infinite 2D and 3D supramolecular structure via intermolecular hydrogen bond interactions.Meanwhile,the contribution of intramolecular short-range effects to the stability of the Co(Ⅱ)complex by Hirshfeld surface analysis have been studied.The fluorescence intensity of the complex decreases after the Co(Ⅱ)coordination.The experimental data are helpful to the further study of the optical properties of Salamo complexes.