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

作　　者：黄妙龄 陈亮莹 赵俞秉 谭欣宇 叶梦月 HUANG Miaoling;CHEN Liangying;ZHAO Yubing;TAN Xinyu;YE Mengyue(College of Chemical Engineering and Materials,Quanzhou Normal University,Quanzhou 362000,China)

机构地区：[1]泉州师范学院化工与材料学院,泉州362000

出　　处：《人工晶体学报》2023年第1期125-131,共7页Journal of Synthetic Crystals

基　　金：福建省自然科学基金(2021J01966);福建省大学生创新训练项目(S201910399039)。

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)_(3)H_(2)O]·CH_(3)OH}n,属于单斜晶系,空间群是P2_(1)/c。该晶胞参数分别为a=1.7568 nm,b=0.6636 nm,c=2.0486 nm,α=90°,β=96.96°,γ=90°,V=2.3707 nm^(3),M_(r)=738.28。配合物2的分子式为{[Pr(POA)_(3)H_(2)O]·H_(2)O}n,属于单斜晶系,空间群是P2_(1)/c。该晶胞参数分别为a=1.7578 nm,b=0.6569 nm,c=2.0467 nm,α=90°,β=97.20°,γ=90°,V=2.3448 nm^(3),M_(r)=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。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)_(3)H_(2)O]·CH_(3)OH}n,which belongs to monoclinic system,and the space group is P2_(1)/c;with a=1.7568 nm,b=0.6636 nm,c=2.0486 nm,α=90°,β=96.96°,γ=90°,V=2.3707 nm^(3),M_(r)=738.28.The molecular formula of complex 2 is{[Pr(POA)_(3)H_(2)O]·H_(2)O}n,which belongs to monoclinic system,and the space group is P2_(1)/c.The cell parameters are a=1.7578 nm,b=0.6569 nm,c=2.0467 nm,α=90°,β=97.20°,γ=90°,V=2.3448 nm^(3),M_(r)=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.

关 键 词：稀土配合物 镧系配合物 镨系配合物 4-硝基氮氧化吡啶-2-甲酸 晶体结构 荧光性质 

分 类 号：O641.4[理学—物理化学]