Eu(III)与两种吡啶二甲酸配合物的合成、晶体结构与发光性能

摘要/Abstract

摘要： 利用水热合成方法,在170 ℃下用3,5-吡啶二甲酸(3,5-H₂pdc)和3,4-吡啶二甲酸(3,4-H₂pdc)与高氯酸铕(Eu(ClO₄)₃)水溶液反应合成了一种新的Eu(III)配合物{[Eu₂(3,5-pdc)(3,4-pdc)₂(H₂O)₄]·3H₂O}_n。X射线单晶衍射测试表明该配合物为二维结构,属单斜晶系, P2₁/m空间群,其晶胞参数为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)°。对该配合物进行了元素分析、红外光谱等表征,并进行了荧光激发光谱、发射光谱、荧光寿命、绝对发光量子产率等测试,结果表明,该配合物能够发射稀土Eu(III)的特征发射光谱,其⁵D₀→⁷F₂跃迁的荧光寿命为338 μs,在313 nm的紫外光激发下,发光量子产率为24%。

关键词: 3,5-吡啶二甲酸, 3,4-吡啶二甲酸, 铕配合物, 水热法, 晶体结构, 光致发光, 量子产率

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 ⁵D₀→⁷F₂ 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

中图分类号:

O641.4

王宏胜, 李会, 刘瞻, 梁彩莲. Eu(III)与两种吡啶二甲酸配合物的合成、晶体结构与发光性能[J]. 人工晶体学报, 2023, 52(10): 1829-1835.

WANG Hongsheng, LI Hui, LIU Zhan, LIANG Cailian. Synthesis, Crystal Structure, and Luminescence Properties of Eu (III) Complex with Two Pyridinedicarboxylic Acids[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2023, 52(10): 1829-1835.

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