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Journal of Synthetic Crystals ›› 2025, Vol. 54 ›› Issue (9): 1633-1641.DOI: 10.16553/j.cnki.issn1000-985x.2025.0055

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Pyridazine Carboxyl Ligand to Construct Copper(Ⅱ) Complex and Its Fluorescence Sensing Performance

SHU Hang1(), WANG Haitao1, NIE Jingyuan1, HUANG Ju1, BAI Jing1, WANG Baoqing2   

  1. 1.College of Chemical Engineering,Henan Technical Institute,Zhengzhou 450042,China
    2.Shandong Anran Nanometer Industry Development Co.,Ltd.,Weihai 264205,China
  • Received:2025-03-21 Online:2025-09-20 Published:2025-09-23

Abstract: Under solvothermal conditions, two novel Cu(Ⅱ) coordination polymers (abbreviated as complex) were constructed by 1-(3-carboxyphenyl)-5-methyl-4-oxo-1,4-dihydropyridazine-3-carboxylic acid abbreviated as H2(3-PDCA), 4,4'-bipyridine (BIPY) ligand and Cu(NO32·3H2O: [Cu2(H2O)3(3-PDCA)2]·2H2O (1) and {[Cu2(BIPY)(3-PDCA)2]·H2O} n2). The environmental hazards of Al3+ drive the development of fluorescent probes based on coordination polymers. Single-crystal X-ray diffraction reveals that complex 1 adopts a four-node ring structure, while complex 2 exhibits a six-node rhombic 2D network. Their structural integrity was confirmed by PXRD, FT-IR, and TGA. Solid-state fluorescence studies demonstrate that complex 1 acts as a highly selective sensor for Al3+ with a detection limit of 2.11×10-5 mol·L-1, surpassing most reported materials. This work highlights the potential of complex 1 as an efficient Al3+ fluorescent probe for environmental monitoring.

Key words: complex; Cu(Ⅱ); metal ion detection; Al3+; fluorescence property

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