两个Co/Ni含氮配体配合物的合成、结构及荧光性质  

Syntheses,Structures and Fluorescent Properties of Two Co/Ni Complexes with Nitrogen⁃Donor Ligands

作　　者：陈贤 柳畅 王莹 关磊 尹鹏鹏 熊学佳 金红哲 Chen Xian;Liu Chang;Wang Ying;Guan Lei;Yin Pengpeng;Xiong Xuejia;Jin Hongzhe(School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun Liaoning 113001,China)

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001

出　　处：《辽宁石油化工大学学报》2021年第6期15-19,共5页Journal of Liaoning Petrochemical University

基　　金：辽宁省教育厅科学研究项目(L2019010)。

摘　　要：以1,4⁃二羟基苯⁃2⁃磺酸钠(NaH2L)、4,4'⁃联吡啶(bipy)、Co(NO_(3))_(2)·6H_(2)O和NiSO_(4)·6H_(2)O为原料,采用加热回流的方法,得到两个结构相似的单核含氮配体配合物M(bipy)(H2O)4·(2H2L)·4H2O(M=Co(1),Ni(2)),其结构和组成采用单晶X⁃射线衍射、元素分析以及热重分析进行表征。结果表明,Co^(2+)和Ni^(2+)是六配位的,呈八面体配位构型,均与一个bipy分子和四个水分子配位;H2L-没有与金属离子配位,起到平衡电荷作用;配合物中,H2L-、自由的水分子以及[M(bipy)(H2O)4]^(2+)形成氢键,这些氢键将其连接构成了网状结构,增加了配合物的稳定性。荧光研究结果表明,配合物1和配合物2的最大荧光发射峰分别在380 nm和390 nm,均是NaH2L的特征荧光发射峰。金属和配体间的电荷转移促使其荧光发射峰红移。Using sodium 1,4⁃dihydroxybenzene⁃2⁃sulfonate sodium(NaH2L),4,4'⁃bipyridine(bipy),Co(NO_(3))_(2)·6H_(2)O and NiSO_(4)·6H_(2)O as raw materials,two mononuclear complexes containing nitrogen⁃donor ligands with similar structures,M(bipy)(H2O)4·(2H2L)·4H2O(M=Co(1),Ni(2)),were synthesized by heating reflux method.The molecular structurse and composition were determined by single crystal X⁃ray diffraction,elemental analyses and thermogravimetric analyses.Co^(2+)and Ni^(2+)are six⁃coordinated,showing octahedral configuration,which are binded with one bipy molecule and four water molecules.H2L-anion does not coordinate with metal ions,balancing charges.In the complexes,H2L-anions,free water molecules and[M(bipy)(H2O)4]^(2+)cations can generate hydrogen bonds,which can form a network structure and increase the stability of the complexes.The fluorescence studies indicate that the maximum emission peaks of complexes 1 and 2 were 380 nm and 390 nm,respectively,which are characteristic fluorescence emission peaks of NaH2L.The red shifts of the fluorescence emission peaks were due to the charge transfers between metal and ligand.

关 键 词：荧光性质 结构 合成 含氮配体 

分 类 号：TE08[石油与天然气工程]