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人工晶体学报 ›› 2025, Vol. 54 ›› Issue (8): 1463-1469.DOI: 10.16553/j.cnki.issn1000-985x.2025.0026

• 研究论文 • 上一篇    下一篇

一例铅基配位聚合物的合成、晶体结构及荧光性能研究

梁毅农1(), 张恺欣1, 徐娅蓉1, 孙赞1,2()   

  1. 1.青海民族大学化学与材料科学学院,西宁 810007
    2.青海省纳米材料与技术重点实验室,西宁 810007
  • 收稿日期:2025-02-14 出版日期:2025-08-20 发布日期:2025-09-01
  • 通信作者: 孙 赞,博士,副教授。E-mail:sunzan_2006@126.com
  • 作者简介:梁毅农(1995—),男,宁夏回族自治区人,硕士研究生。E-mail:952719361@qq.com
  • 基金资助:
    青海省自然科学基金(2020-ZJ-964Q)

Synthesis, Crystal Structure and Fluorescent Properties of a Lead-Based Coordination Polymer

LIANG Yinong1(), ZHANG Kaixin1, XU Yarong1, SUN Zan1,2()   

  1. 1.School of Chemistry and Materials Science,Qinghai Minzu University,Xining 810007,China
    2.Qinghai Provincial Key Laboratory of Nanomaterials and Technology,Xining 810007,China
  • Received:2025-02-14 Online:2025-08-20 Published:2025-09-01

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(H2O)] n1)。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C40H28N8O7Pb。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。

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

Abstract: In this paper, a novel coordination polymer, [Pb(PTPBA)2(H2O)] n1), 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=1.162 15 (2) nm, b=1.197 45 (2) nm, c=1.504 68 (2) nm and α = 109.007 0 (10)°, β = 90.487 0 (10) °, γ = 115.910 0 (10)°. The molecular formula is C40H28N8O7Pb. 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 and π…π stacking 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.

Key words: lead coordination polymer; solvothermal method; supramolecular structure; fluorescence performance; p-nitroaniline

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