A Zn(II) Coordination Polymer Assembled from Pyridazine-Tetracarboxylate: Single-Crystal X-ray Structure, Hirshfeld Surface Analysis, and Bifunctional Fluorescence Sensing Toward Cu²⁺ and Tetracycline.

Authors

Youning Hu, Dongfeng Zhao, Miaomiao Zhou, Shiguo Gu, Jingjing Hu

Published in

Journal of fluorescence. Jun 27, 2026. Epub Jun 27, 2026.

Abstract

Under solvothermal reaction conditions, a freshly designed Zn(II)-bearing coordination polymer, {[Zn₂(H₂O)₅(DODDA)]·H₂O·DEA}_n (denoted as CP 1), was successfully prepared from the multifunctional pyridazine‑tetracarboxylic acid ligand H₄DODDA. According to single-crystal X-ray diffraction data, CP 1 adopts a two-dimensional layered architecture, and the overall supramolecular assembly is further reinforced through extensive hydrogen‑bonding interactions revealed by Hirshfeld surface analysis. In aqueous media, CP 1 exhibits stable and intense luminescence behavior. Fluorescence-based sensing investigations reveal that this material can function as a highly selective bifunctional fluorescent probe for Cu²⁺ ions and tetracycline antibiotics through an emission‑quenching process. The calculated detection limits for Cu²⁺ and TC are 0.773 µmol and 0.065 µmol, respectively. These findings suggest that CP 1 possesses promising application potential for simultaneous monitoring of heavy‑metal contaminants and antibiotic residues in environmental systems.

PMID:
42364003
Bibliographic data and abstract were imported from PubMed on 27 Jun 2026.

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