4-硝基氮氧化吡啶-2-甲酸构筑的镧、镨配合物的合成、晶体结构及荧光性质

黄妙龄; 陈亮莹; 赵俞秉; 谭欣宇; 叶梦月

人工晶体学报, 2023, 52 (1): 125, 网络出版: 2023-03-18

4-硝基氮氧化吡啶-2-甲酸构筑的镧、镨配合物的合成、晶体结构及荧光性质

Synthesis, Crystal Structure and Fluorescence Properties of Lanthanum and Praseodymium Complexes Constructed by 2-Carboxylic Acid-4-Nitropyridine-1-Oxide

论文大纲

黄妙龄 ^*陈亮莹赵俞秉谭欣宇叶梦月

作者单位

泉州师范学院化工与材料学院，泉州 362000

摘要

选择刚性有机化合物4-硝基氮氧化吡啶-2-甲酸(POA)作为配体，与稀土金属 La(III)、Pr(III)反应，合成了2个一维配位聚合物。X射线单晶衍射结果表明：配合物1的分子式为{［La(POA)3H2O］·CH3OH}n，属于单斜晶系，空间群是P21/c。该晶胞参数分别为a=1.756 8 nm，b=0.663 6 nm，c=2.048 6 nm，α=90°，β=96.96°，γ=90°,V=2.370 7 nm3，Mr=738.28。配合物2的分子式为{［Pr(POA)3H2O］·H2O}n，属于单斜晶系，空间群是P21/c。该晶胞参数分别为a=1.757 8 nm，b=0.656 9 nm，c=2.046 7 nm，α=90°，β=97.20°，γ=90°,V=2.344 8 nm3，Mr=726.25。两个配合物的配位单元组成和结构相似，中心离子都处于稍变形的三帽三棱柱的配位环境中。通过红外光谱、紫外光谱、热重分析仪和荧光光谱仪对两个配合物的性质进行表征。荧光分析表明，配体和配合物均有较强的荧光性能。

Abstract

Two one-dimensional coordination polymers were synthesized using rigid organic compound 2-carboxylic acid-4-nitropyridine-1-oxide(POA) as ligand, reacting with rare earth La(III) and Pr(III). The single crystal X-ray diffraction results show that the molecular formula of complex 1 is {［La(POA)3H2O］·CH3OH}n, which belongs to monoclinic system, and the space group is P21/c; with a=1.756 8 nm, b=0.663 6 nm, c=2.048 6 nm, α=90°, β=96.96°, γ=90°, V=2.370 7 nm3, Mr=738.28. The molecular formula of complex 2 is {［Pr(POA)3H2O］·H2O}n, which belongs to monoclinic system, and the space group is P21/c. The cell parameters are a=1.757 8 nm, b=0.656 9 nm, c=2.046 7 nm, α=90°, β=97.20°, γ=90°, V=2.344 8 nm3, Mr=726.25. The composition and structure of coordination units of two complexes are similar, and the central Ln(III) ion is in the coordination environment of a slightly modified tricapped trigonal prism configuration. The properties of two complexes were characterized by infrared, ultraviolet, thermogravimetric analyzer and fluorescence spectrometer. Fluorescence analysis shows that both ligand and complexes have strong fluorescence properties.

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黄妙龄, 陈亮莹, 赵俞秉, 谭欣宇, 叶梦月. 4-硝基氮氧化吡啶-2-甲酸构筑的镧、镨配合物的合成、晶体结构及荧光性质[J]. 人工晶体学报, 2023, 52(1): 125. HUANG Miaoling, CHEN Liangying, ZHAO Yubing, TAN Xinyu, YE Mengyue. Synthesis, Crystal Structure and Fluorescence Properties of Lanthanum and Praseodymium Complexes Constructed by 2-Carboxylic Acid-4-Nitropyridine-1-Oxide[J]. Journal of Synthetic Crystals, 2023, 52(1): 125.

4-硝基氮氧化吡啶-2-甲酸构筑的镧、镨配合物的合成、晶体结构及荧光性质

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