摘要
本文通过溶剂热法,以3-[2-(5-吡啶-4-基-4H-[1,2,4]三唑-3-基)-苯氧基]苯甲酸(HPTPBA)为配体,硝酸铅为金属源,成功合成了一例新型的配位聚合物[Pb(PTPBA)_(2)(H_(2)O)]_(n)(1)。通过元素分析、X射线单晶衍射、X射线粉末衍射和红外光谱对配合物1进行了结构表征,研究其热稳定性和固态发光行为。X射线单晶衍射结果表明,1属于三斜晶系P1空间群,晶胞参数为a=1.162 15(2) nm、b=1.197 45(2) nm、c=1.504 68(2) nm和α=109.007 0(10)°、β=90.487 0(10)°、γ=115.910 0(10)°,分子式为C_(40)H_(28)N_(8)O_(7)Pb。结构解析结果显示,PTPBA-配体连接铅离子形成一维链结构,一维链可通过N—H…O氢键和π…π堆积相互作用扩展为三维超分子结构。1在322 nm的激发波长下最大发射波长为550 nm,对1进行荧光传感实验,发现1对p-NA(对硝基苯胺)有高选择性。p-NA可以淬灭1的荧光,对淬灭机理进行了探究,发现荧光淬灭现象主要是由竞争性吸收导致。
In this paper,a novel coordination polymer,[Pb(PTPBA)_(2)(H_(2)O)]_(n)(1),was successfully synthesized using solvothermal method with 3-[2-(5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-phenoxy]benzoic acid(HPTPBA)and lead nitrate.The structure of 1 was characterized by elemental analysis,X-ray single crystal diffraction,X-ray powder diffraction,and infrared spectroscopy.The thermal stability and solid-state luminescence behavior of 1 were also studied.X-ray single crystal diffraction shows that 1 belongs to the triclinic crystal system P1 space group with lattice parameters of a=1.16215(2)nm,b=1.19745(2)nm,c=1.50468(2)nm and α=109.0070(10)°,β=90.4870(10)°,γ=115.9100(10)°.The molecular formula is C_(40)H_(28)N_(8)O_(7)Pb.In the structure of 1,PTPBA-ligands connect Pb ions to form one-dimensional chain structures,which can be extended into three-dimensional supramolecular structures through N-H…O hydrogen bonds andπ…πstacking interactions.The maximum emission wavelength of 1 at an excitation wavelength of 322 nm is 550 nm.Fluorescence sensing experiments were conducted on 1,and it was found that 1 has high selectivity for p-NA(p-nitroaniline).The quenching mechanism of 1 was explored,illustrating that the fluorescence quenching phenomena is mainly caused by competitive absorption.
作者
梁毅农
张恺欣
徐娅蓉
孙赞
LIANG Yinong;ZHANG Kaixin;XU Yarong;SUN Zan(School of Chemistry and Materials Science,Qinghai Minzu University,Xining 810007,China;Qinghai Provincial Key Laboratory of Nanomaterials and Technology,Xining 810007,China)
出处
《人工晶体学报》
北大核心
2025年第8期1463-1469,共7页
Journal of Synthetic Crystals
基金
青海省自然科学基金(2020-ZJ-964Q)。
关键词
铅配位聚合物
溶剂热法
超分子结构
荧光性能
对硝基苯胺
lead coordination polymer
solvothermal method
supramolecular structure
fluorescence performance
p-nitroaniline
