氮杂环卡宾Cu配合物的制备及荧光猝灭性质

Preparation and Fluorescence Quenching Properties of Nitrogen Heterocarbene Cu Complexes

以苯并咪唑、溴化苄为原料合成苄基官能化氮杂环卡宾配体(Bn-NHC),基于Bn-NHC,采用溶剂热法,合成了苄基官能化氮杂环卡宾Cu配合物[(Bn-NHC)CuBr].通过X射线单晶衍射、热重分析、红外光谱和粉末衍射等手段对目标配合物进行了结构表征及性质研究.结构分析表明:目标配合物属于四方晶系,空间群为Pcnb,晶胞参数a=1.4224(16)nm、b=1.998(2)nm、c=1.998(2)nm、α=90°、β=90°、γ=90°、晶胞体积为5.676(11)nm^(3)、单胞中分子个数为41,Bn-NHC中4个氮原子配位一个Cu^(2+)形成四方体零维结构.对(Bn-NHC)CuBr进行了荧光性能测试,结果表明Cu^(2+)能使Bn-NHC的荧光性显著减弱,可应用于荧光猝灭分析.

Benzyl functionalization nitrogen heterocyclic carbene ligand(Bn-NHC)was synthesized from benzimidazole and benzyl bromide.Based on Bn-NHC lignand,a novel Cu complex[(Bn-NHC)CuBr]was prepared by solvothermal technique.The structure and properties of the target complexes were studied by X-ray single crystal diffraction,thermogravimetric analysis,infrared spectroscopy and PXRD.The structural analysis shows that the target complex belongs to the tetragonal system,the space group is Pcnb,and the cell parameters a=1.4224 nm,b=1.998 nm,c=1.998 nm,α=90°,β=90°,γ=90°,the cell volume is 5.676(11)nm 3 and Z=41.Four nitrogen atoms on Bn-NHC ligand coordinate with a Cu ion to form a tetragonal zero-dimensional structure.The fluorescence performance of(Bn-NHC)CuBr was tested.It showed that Cu^(2+)could significantly weaken the fluorescence of Bn-NHC ligand,which could be applied to fluorescence quenching analysis.