2-(2-苯并咪唑基)吡啶双核镉(Ⅱ)配合物的水热合成、晶体结构及荧光性质

Hydrothermal Synthesis,Crystal Structure and Photoluminescence Property of Cadmium(Ⅱ) Complex of 2-(2-Benzimidazolyl)pyridine

通过水热反应,合成了2-(2-苯并咪唑基)吡啶(BMPY)镉(Ⅱ)配合物[Cd2Cl4(BMPY)2]。对它进行了元素分析、热重、红外光谱及电子光谱表征,并用X-射线单晶衍射测定了配合物的晶体结构。配体2-(2-苯并咪唑基)吡啶中的2个氮原子与3个氯原子与镉(Ⅱ)配位,形成五配位的畸变四角锥构型,2个配位镉(Ⅱ)离子通过双氯桥键结合成双核镉的配合物。该配合物通过分子间N-H…Cl,C-H…Cl氢键和π-π作用形成一维链状结构。热重-微分热重(TG-DTG)分析结果表明,[Cd2Cl4(BMPY)2]在320℃以下无分解反应,耐热性好。室温固态荧光测试显示,配合物在408.9 nm(λmax)处具有较强的荧光发射。

A cadmium complex,[Cd2Cl4（BMPY）2]（BMPY：2-（2-benzimidazolyl）pyridine）,was synthesized by hydrothermal synthesis techniques and characterized by elemental analysis,thermogravimetric analysis,IR spectrum analysis and spectrofluorimetry.The single crystal structure was determined by the X-ray single crystal diffraction.The cadmium（Ⅱ） is coordinated with three chlorine atoms and two nitrogen atoms of one 2-（2-benzimidazolyl）pyridine molecule,generating a distorted quadrangular pyramid coordination geometry,and the dinuclear complex is formed with two chlorine bridge bonds.One-dimensional chain structure is constructed by hydrogen bonds of N-H…Cl,C-H…Cl and π-π interactions.TG-DTG and fluorescence analysis indicate that the complex has good thermal stability without decomposition reaction below 320 ℃ and exhibits a strong fluorescence-emission（λmax=408.9 nm） in the solid state at room temperature.