Citation: WANG Yu, ZHANG Lijing, WANG Ying, BAI Fengying, XING Yongheng. Synthesis, Structure and Fluorescence Effects of Pyrazole-Pyridine Europium Complex[J]. Chinese Journal of Applied Chemistry, ;2018, 35(10): 1256-1263. doi: 10.11944/j.issn.1000-0518.2018.10.170360 shu

Synthesis, Structure and Fluorescence Effects of Pyrazole-Pyridine Europium Complex

College of Chemical Engineering, Liaoning Normal University, Dalian, Liaoning 116029, China

Corresponding author: BAI Fengying, baifengying2003@163.com
Received Date: 11 October 2017
Revised Date: 20 November 2017
Accepted Date: 8 January 2018

Fund Project: Supported by National Natural Science Foundation of China(No.21571091)National Natural Science Foundation of China 21571091

Figures(11)

A new complex Eu(L)(MeOH)(NO₃)₃ was designed and synthesized under the hydrothermal reaction condition using Eu(NO₃)₃·6H₂O as the metal source and 2, 6-bis(5-phenyl-1H-pyrazol-3-yl) pyridine (L) as the ligand, and characterized by elemental analysis, infrared spectra, thermogravimetric analysis, X-ray powder diffraction and X-ray single crystal diffraction. The structural analysis shows that the central metal of complex is nine-coordinated and each of the central metal europium atoms is coordinated with three nitrogen atoms from L, six oxygen atoms from NO₃^- ions and MeOH to form a slightly distorted three-cap triangular prismatic spatial configuration. It is found that the complex has a strong fluorescence quenching effect on copper and nickel ions. The presence of other competing metal ions does not interfere with selective detection of Cu²⁺ by the complex, but has certain effect on the selective detection of Ni²⁺.
- europium complexes,
- nitrogen heterocyclic ligands,
- crystal structure,
- fluorescence properties,
- fluorescence quenching
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