A novel fluorescent sensor for Al^(3+)and Zn^(2+)based on a new europium complex with a 1,10-phenanthroline ligand  

作　　者：Huimin Song Gang Liu Congbin Fan Shouzhi Pu 

机构地区：[1]Jiangxi Key Laboratory of Organic Chemistry.Jiangxi Science and Technology Normal University,Nanchang 330013,China

出　　处：《Journal of Rare Earths》2021年第4期460-468,共9页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China.China(21861017,41867053);the Key Project of Natural Science Foundation of Jiangxi Province,China(20192ACBL20011).

摘　　要：A new europium complex Eu(tta)_(3)Li(la)based on 1,10-phenanthroline derivative(Li=(2-(3,5-dimethoxyphenyl)-1 H-imidazo[4,5-f][1,10]phenanthroline),tta=2-thenoyItrifluoroacetone)was designed and synthesized.Its structure was characterized by^(1)H and^(13)C NMR,elemental analysis,UV-vis,fluorescence spectra and single crystal X-ray diffraction.The crystal of the complex la belongs to monoclinic system with the space group P2_(1/n).The europium complex la in the solid and in the solution displays the typical emission of Eu(III)ion centered at 612 nm as a result of the electric dipole transition(^(5)D_(0)-►^(7)F_(2)).It exhibits high quantum yield(20.42%),long lifetime(0.29 ms)and good CIE color coordinate(0.67,0.33)in solid.In addition,the complex shows high sensitivity and selectivity towards Al^(3+)and Zn^(2+)in methanol solution which can be attributed to the Al^(3+)/Zn^(2+)cation instead of Eu^(3+)in the complex la.The LODs for Al^(3+)and Zn^(2+)were calculated to be 5.880×10^(-7)and 7.678×10^(-8)mol/L,respectively.Besides,the additions of Al^(3+)and Zn^(2+)express remarkable color changes from red to bright blue and ivory that can be clearly observed by the naked eye respectively.

关 键 词：Europium complex FLUORESCENCE Al^(3+) Zn^(2+)detection CIE chromaticity coordinates Sensing mechanism Rare earths 

分 类 号：O641.4[理学—物理化学] O657.3[理学—化学] TP212[自动化与计算机技术—检测技术与自动化装置]