A novel fluorescent sensor for Al3+ and Zn2+ based on a new europium complex with a 1,10-phenanthroline ligand
来源期刊：JOURNAL OF RARE EARTHS2021年第4期
论文作者：Huimin Song Gang Liu Congbin Fan Congbin Fan
摘 要：A new europium complex Eu（tta）3 L1（la） based on 1,10-phenanthroline derivative（L1=（2-（3,5-dimethoxyphenyl）-1 H-imidazo[4,5-f][1,10]phenanthroline）,tta=2-thenoyltrifluoroacetone） was designed and synthesized.Its structure was characterized by 1 H and 13C 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 P21/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 D0→7 F2）.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 Al3+and Zn2+ in methanol solution which can be attributed to the Al3+/Zn2+ cation instead of Eu3+in the complex la.The LODs for Al3+ and Zn2+ were calculated to be 5.880×10-7 and 7.678×10-8 mol/L,respectively.Besides,the additions of Al3+ and Zn2+ express remarkable color changes from red to bright blue and ivory that can be clearly observed by the naked eye respectively.
Huimin Song，Gang Liu，Congbin Fan，Shouzhi Pu
Jiangxi Key Laboratory of Organic Chemistry,Jiangxi Science and Technology Normal University
摘 要：A new europium complex Eu（tta）3 L1（la） based on 1,10-phenanthroline derivative（L1=（2-（3,5-dimethoxyphenyl）-1 H-imidazo[4,5-f][1,10]phenanthroline）,tta=2-thenoyltrifluoroacetone） was designed and synthesized.Its structure was characterized by 1 H and 13C 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 P21/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 D0→7 F2）.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 Al3+and Zn2+ in methanol solution which can be attributed to the Al3+/Zn2+ cation instead of Eu3+in the complex la.The LODs for Al3+ and Zn2+ were calculated to be 5.880×10-7 and 7.678×10-8 mol/L,respectively.Besides,the additions of Al3+ and Zn2+ express remarkable color changes from red to bright blue and ivory that can be clearly observed by the naked eye respectively.
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