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Synthesis and Fluorescence Properties of Eu3+, Tb3+ Complexes with Schiff Base Derivatives

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Abstract

Novel Schiff base ligands derived from N′-benzylidene-benzohydrazide (substituted by –H, −CH3, −OCH3, −Cl) and 2-chloro-N-phenylacetamide were synthesized. The solid complexes of rare earth (Eu, Tb) nitrate with these Schiff base ligands were synthesized and characterized by elemental analysis, EDTA titrimetric analysis, thermal analysis, infrared spectra and UV–Vis spectra analysis. The fluorescence properties of rare earth (Eu, Tb) complexes in solid were studied. Under the excitation of ultraviolet light, these complexes exhibited characteristic emission of europium and terbium ions. The results showed that the ligand favored energy transfer to the emitting energy of Eu and Tb ions. Effects of different ligands on the fluorescence intensity of rare earth (Eu, Tb) complexes had been discussed. The electrochemical properties of rare earth (Eu, Tb) complexes were also investigated.

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Abbreviations

UV–Vis:

Ultraviolet visible

EDTA:

Ethylenediaminetetraacetic acid

HOMO:

Highest occupied molecular orbital

LUMO:

Lowest unoccupied molecular orbital

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Acknowledgments

We are grateful to the financial support of the National Natural Science Foundation of China (No.J1103312; No.J1210040; No.21341010), the Innovative Research Team in University (No.IRT1238) and chemical excellent engineer training program of Hunan university. We also thank Dr. William Hickey, the U.S. professor of HRM, for the English editing on this paper.

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China

    Yanhong Liu, Weihua Kong, Ming Dai, Ling Shi & Dongcai Guo

  2. Hunan Provincial Key Laboratory for Cost-effective Utilization of Fossil Fuel Aimed at Reducing Carbon-dioxide Emissions, Changsha, 410082, China

    Yanhong Liu & Dongcai Guo

  3. School of Chemical Engineering, Ningbo University of Technology, Ningbo, 315016, China

    Zehui Yang

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  1. Yanhong Liu
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  2. Weihua Kong
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  3. Zehui Yang
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  4. Ming Dai
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  5. Ling Shi
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  6. Dongcai Guo
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Correspondence to Dongcai Guo.

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Liu, Y., Kong, W., Yang, Z. et al. Synthesis and Fluorescence Properties of Eu3+, Tb3+ Complexes with Schiff Base Derivatives. J Fluoresc 26, 567–576 (2016). https://doi.org/10.1007/s10895-015-1741-8

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  • DOI: https://doi.org/10.1007/s10895-015-1741-8

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