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JOURNAL OF SYNTHETIC CRYSTALS ›› 2023, Vol. 52 ›› Issue (10): 1829-1835.

• Research Articles • Previous Articles     Next Articles

Synthesis, Crystal Structure, and Luminescence Properties of Eu (III) Complex with Two Pyridinedicarboxylic Acids

WANG Hongsheng1,2,3, LI Hui1,2,3, LIU Zhan1,2,3, LIANG Cailian1,2,3   

  1. 1. Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Xuchang 461000, China;
    2. Institute of Surface Micro and Nano Materials, Xuchang University, Xuchang 461000, China;
    3. College of Chemical and Materials Engineering, Xuchang University, Xuchang 461000, China
  • Received:2023-05-08 Published:2023-10-18

Abstract: A new Eu(III) complex {[Eu2(3,5-pdc)(3,4-pdc)2(H2O)4]·3H2O}n was synthesized by reacting 3,5-pyridinedioic acid (3,5-H2pdc) and 3,4-pyridinedioic acid (3,4-H2pdc) with Eu(ClO4)3 water solution at 170 ℃ by hydrothermal method. X-ray single crystal diffraction shows that the complex is a two-dimensional structure. The complex crystallized in monoclinic crystal system and P21/m space group. Its crystal cell parameters are a=0.598 20(4) nm,b=2.639 21(19) nm, c=1.147 58(9) nm, α=γ=90°,β=102.628 0(10)°. The complex was characterized by elemental analysis, infrared spectroscopy. The excitation and emission spectrum, fluorescence lifetime and luminescence quantum yield of the complex were tested. The results indicate that the complex can emit characteristic spectra of Eu (III). The fluorescence lifetime of 5D07F2 transition is 338 μs, and the absolute luminescence quantum yield is 24% under the excitation of 313 nm ultraviolet light.

Key words: 3,5-pyridyldicarboxylic acid, 3,4-pyridinedicarboxylic acid, europium complex, hydrothermal method, crystal structure, photoluminescence, quantum yield

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