一种铽配合物用于水溶液中二甲硝咪唑和四环素的检测  

A terbium complex for the detection of dimetridazole and tetracycline in an aqueous solution

作　　者：刘洋[1] 范广[1] 高丰琴[1] 侯磊 朱冬雨 王尧宇[2] LIU Yang;FAN Guang;GAO Feng-Qin;HOU Lei;ZHU Dong-Yu;WANG Yao-Yu(School of Chemistry and Chemical Engineering,Xianyang Normal University,Xianyang,Shannxi 712000,China;College of Chemistry&Materials Science,Northwest University,Xi′an 710069,China)

机构地区：[1]咸阳师范学院化学与化工学院,咸阳712000 [2]西北大学化学与材料科学学院,西安710069

出　　处：《无机化学学报》2023年第7期1235-1243,共9页Chinese Journal of Inorganic Chemistry

基　　金：陕西省自然科学基础研究计划基金(No.2023-JC-QN-0173);陕西省教育厅科研计划基金(No.22JK0605);国家级大学生创新创业训练计划(No.202210722013)资助。

摘　　要：选用(1,1’:3’,1"-三联苯)-3,3",4’,5,5",6’-六羧酸(H6L)为配体,在溶剂热条件下,与Tb3+离子反应得到配合物[Tb(L)0.5(H2O)2]·7H2O(1)。通过单晶X射线衍射、粉末X射线衍射、红外光谱、元素分析、热重分析对该配合物的结构和组成进行了表征,同时,对其荧光性质进行了研究。结果表明:该配合物属于正交晶系,Cmca空间群,a=2.66161(7)nm,b=1.42103(4)nm,c=2.10988(6)nm。拓扑计算表明配合物1是一个新颖的(6,6)-连接的三维网络结构,符号为(48.66.8)(49.66)。该配合物具有强的荧光发射,可以快速检测水溶液中的二甲硝咪唑和四环素且灵敏度高、检出限低、可回收性好。通过实验和密度泛函理论相结合,揭示了荧光猝灭机理。One complex with formula[Tb(L)0.5(H2O)2]·7H2O(1)was prepared under the solvothermal condition by employing(1,1'∶3',1″-triphenyl)-3,3″,4',5,5″,6'-hexacarboxylic acid(H6L)and Tb3+ion.The structure and composition of complex 1 were characterized by single-crystal X-ray diffraction,powder X-ray diffraction,infrared spectroscopy,elemental analysis,and thermogravimetric analysis.The fluorescence property of complex 1 was also studied.The results show that complex 1 belongs to the orthorhombic system,Cmca space group with cell parameters:a=2.66161(7)nm,b=1.42103(4)nm,c=2.10988(6)nm.Topological calculation shows that complex 1 is a novel(6,6)-connected 3D network with the symbol(48.66.8)(49.66).Further study shows that complex 1 has strong fluorescence emission.It was sensitive in the detection of dimetridazole(MDZ)and tetracycline(TET)in an aqueous solution with high sensitivity,low detection limit,and good recyclability.The mechanism of fluorescence quenching was disclosed through the combination of experiments and density functional theory calculations.

关 键 词：配合物 晶体结构 抗生素 荧光传感 

分 类 号：O614.341[理学—无机化学]