基于2-氨基-3-羟基-吡啶Schiff碱的双核Ni(Ⅱ)和Zn(Ⅱ)配合物:合成、超分子结构和光谱性质
Binuclear Nickel(Ⅱ) and Zinc(Ⅱ) Complexes Based on 2-Amino-3-hydroxy-pyridine Schiff Base: Syntheses, Supramolecular Structures and Spectral Properties
作者单位E-mail
常健 兰州交通大学化学与生物工程学院, 兰州 730070  
张宏佳 兰州交通大学化学与生物工程学院, 兰州 730070  
贾浩然 兰州交通大学化学与生物工程学院, 兰州 730070  
孙银霞 兰州交通大学化学与生物工程学院, 兰州 730070 sun_yinxia@163.com 
摘要: 合成了2个2-氨基-3-羟基-吡啶Schiff碱双核Ni(Ⅱ)和Zn(Ⅱ)配合物,[Ni(L1)(DMF)]21)(H2L1=4-羟基-3-((3-羟基-吡啶-2-亚氨基))-苯并吡喃-2-酮)和[Zn(L2)(H2O)]2·2DMF(2)(H2L2=2-((3,5-二溴-2-羟基)-氨基)-吡啶-3-醇),并通过元素分析、红外光谱、紫外-可见吸收光谱、荧光光谱及X射线单晶衍射分析等手段进行了表征。X射线单晶衍射分析结果表明:配合物12均具有双核结构,均由2个金属离子和2个配体单元以及2个配位的溶剂分子组成,不同的是配合物2含有2个溶剂分子。配合物12都是单斜晶系、P21/c空间群,且中心金属Ni(Ⅱ)和Zn(Ⅱ)离子的空间构型均为五配位的扭曲的四方锥。此外,配合物12通过分子间氢键、C-H…πππ作用形成3D超分子结构。此外,讨论了H2L1,H2L2及其相应的Ni(Ⅱ)和Zn(Ⅱ)配合物的荧光性质。配体H2L1和H2L2呈现蓝色发射,最大发射波长λem分别为457和473 nm,而配合物12显示绿色发射,λem分别为543和538 nm。
关键词: 2-氨基-3-羟基-吡啶Schiff碱  双核配合物  超分子结构  荧光性质
基金项目: 兰州交通大学优秀科研平台(No.201706)、甘肃省重点研发计划项目(No.18YF1GA054)资助。
Abstract: Two 2-amino-3-hydroxy-pyridine Schiff base binuclear Ni(Ⅱ) and Zn(Ⅱ) complexes,[Ni(L1)(DMF)]2 (1) (H2L1=4-hydroxy-3-((3-hydroxy-pyridin-2-ylimino)-methyl)-chromen-2-one) and[Zn(L2)(H2O)]2·2DMF (2) (H2L2=2-((3,5-dibromo-2-hydroxy-benzylidene)-amino)-pyridin-3-ol) have been synthesized and characterized by elemental analyses, IR, UV-Vis, emission spectra and X-ray crystallography. X-ray crystallography analyses showed that complexes 1 and 2 all possess the binuclear structures, consisting of two metal ions, two ligand units and two coordinated solvent molecules, in which the difference is that complex 2 contains two solvent molecules. Complexes 1 and 2 crystallize in the monoclinic space group P21/c and the center Ni(Ⅱ) and Zn(Ⅱ) are all five-coordinated slightly distorted square pyramid geometry by four O atoms and one imine N atoms. Complex 1 (or 2) links some other molecules into an infinite 3D network supramolecular structure via intermolecular hydrogen bond, C-H…π or ππ stacking interactions. And the fluorescent properties of H2L1, H2L2 and their corresponding Ni(Ⅱ) and Zn(Ⅱ) complexes have been discussed. The ligands H2L1 and H2L2 exhibit blue emission with the maximum emission wavelength λem=457 and 473 nm, and complexes 1 and 2 show green emission with λem=543 and 538 nm.
Keywords: 2-amino-3-hydroxy-pyridine Schiff base  binuclear complex  supramolecular structure  fluorescence property
投稿时间:2018-07-14 修订日期:2018-09-11
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常健,张宏佳,贾浩然,孙银霞.基于2-氨基-3-羟基-吡啶Schiff碱的双核Ni(Ⅱ)和Zn(Ⅱ)配合物:合成、超分子结构和光谱性质[J].无机化学学报,2018,34(11):2097-2107.
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