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Journal of Synthetic Crystals ›› 2025, Vol. 54 ›› Issue (8): 1463-1469.DOI: 10.16553/j.cnki.issn1000-985x.2025.0026

• Research Articles • Previous Articles     Next Articles

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

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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