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<p>Two novel Co(II)-based coordination polymers, [Co(HDNA)(bibp)(H₂O)]ₙ (CP1) and {[Co₃(DCPN)₂(4,4′-bibp)₃(H₂O)₄]}ₙ (CP2), were synthesized via hydrothermal reactions using H₃DCPN and different N-donor co-ligands. Structural analysis revealed that CP1 forms a 2D layered network, while CP2 adopts a 1D chain structure extended into a 3D supramolecular framework. Both CP1 and CP2 exhibited excellent fluorescence sensing abilities toward sulfamethoxazole (SMX), with strong enhancement responses. CP1 showed a linear Stern–Volmer relationship (R² = 0.9944) and a binding constant of 1.37 × 10⁴ M⁻¹, while CP2 gave R² = 0.9936 and K = 1.54 × 10⁴ M⁻¹. Both materials displayed high selectivity, anti-interference capacity, and good cycling stability, demonstrating their potential as reusable fluorescent sensors for SMX detection.</p>

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Cobalt(II) Coordination Polymers for Highly Sensitive and Selective Turn-On Fluorescence Detection of Sulfamethoxazole

  • 期刊论文

  • 发表日期：

    2026年1月5日

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  • Liuchang Wang,
  • Hongjiang Ren,
  • Jiangtao Li,
  • Jing Li

摘要

Two novel Co(II)-based coordination polymers, [Co(HDNA)(bibp)(H₂O)]ₙ (CP1) and {[Co₃(DCPN)₂(4,4′-bibp)₃(H₂O)₄]}ₙ (CP2), were synthesized via hydrothermal reactions using H₃DCPN and different N-donor co-ligands. Structural analysis revealed that CP1 forms a 2D layered network, while CP2 adopts a 1D chain structure extended into a 3D supramolecular framework. Both CP1 and CP2 exhibited excellent fluorescence sensing abilities toward sulfamethoxazole (SMX), with strong enhancement responses. CP1 showed a linear Stern–Volmer relationship (R² = 0.9944) and a binding constant of 1.37 × 10⁴ M⁻¹, while CP2 gave R² = 0.9936 and K = 1.54 × 10⁴ M⁻¹. Both materials displayed high selectivity, anti-interference capacity, and good cycling stability, demonstrating their potential as reusable fluorescent sensors for SMX detection.