Synthesis and Photoluminescence Properties of Doped Europium Complexes with 2-Pyrazinecarboxylate

Abstract:

Seven europium complexes of 2-pyrazinecarboxylate (pyca) doped with inert fluorescent lanthanide ions (La³⁺, Y³⁺) have been synthesized. Elemental analysis, IR spectroscopy, absorption spectroscopy and TG-DSC analysis showed that the complexes have the formulas of Eu(pyca)₃•3H₂O and Eu_xRE_1-x(pyca)₃•3H₂O (RE=La, Y; x = 0.7,0.5,0.3), respectively. The lanthanide ions coordinated with carboxylic oxygen atoms and nitrogen atoms of pyca. Luminescence spectra and luminescence life-times of the complexes have been measured and their quantum yields were calculated. The results showed that the existence of La³⁺ and Y³⁺ ions could enhance the luminescence intensity and quantum yield of the europium complexes, which may arise from the intramolecular energy transfer between the inert fluorescent lanthanide ions and Eu³⁺ ion. Those doped complexes have the advantages of strong luminescence, low cost and practical application value.

• Periodical: Advanced Materials Research (Volumes 399-401)
• Pages: 963-966
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.399-401.963
• Online since: November 2011
• Authors: Hai Xia Zhang, Rui Jun Ma, Hai Bin Chu, Ming Yan Zhao, Ying Nan Chen, Kai Kong, Yong Liang Zhao
• Keywords: 2-Pyrazinecarboxylic Acid, Doped, Europium Complex, Luminescence

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