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.
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)
出处
《人工晶体学报》
CAS
北大核心
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)。
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
rare earth complex
lanthanide complex
praseodymium complex
2-carboxylic acid-4-nitropyridine-1-oxide
crystal structure
fluorescence property
