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<p>In this work, two Cu(II)-based coordination polymers, [Cu(oba)(bpta)]·(DMF)₂ (CP1) and [Cu(oba)(bpfb)]·(DMF)₂ (CP2), were synthesized via a mixed-ligand solvothermal method using 4,4′-oxybisbenzoic acid (H₂oba) and bis-pyridyl co-ligands. Both CPs exhibit strong solid-state fluorescence and excellent water stability. CP1 shows high selectivity for Fe<sup>3</sup>⁺ with a K<sub>SV</sub> of 2.63 × 10<sup>5</sup>&#xa0;M⁻<sup>1</sup> and LOD of 0.37&#xa0;μmol·L⁻<sup>1</sup>, while CP2 is highly sensitive to CrO₄<sup>2</sup>⁻ with a K<sub>SV</sub> of 1.47 × 10<sup>5</sup>&#xa0;M⁻<sup>1</sup> and LOD of 0.65&#xa0;μmol·L⁻<sup>1</sup>. Both materials demonstrate reversible fluorescence quenching over multiple cycles. These results indicate that CP1 and CP2 are promising luminescent probes for the sensitive and recyclable detection of environmentally hazardous ions, offering potential for real-time water quality monitoring.</p>

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Dual Cu(II)-Based Functional MOFs with Fluorescent Sensing Capability toward Fe3⁺ and CrO₄2⁻ Ions

  • 期刊论文

  • 发表日期：

    2025年5月22日

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  • Yanjun Chen,
  • Haiwen Zhang,
  • Yongshan Wang

摘要

In this work, two Cu(II)-based coordination polymers, [Cu(oba)(bpta)]·(DMF)₂ (CP1) and [Cu(oba)(bpfb)]·(DMF)₂ (CP2), were synthesized via a mixed-ligand solvothermal method using 4,4′-oxybisbenzoic acid (H₂oba) and bis-pyridyl co-ligands. Both CPs exhibit strong solid-state fluorescence and excellent water stability. CP1 shows high selectivity for Fe3⁺ with a KSV of 2.63 × 105 M⁻1 and LOD of 0.37 μmol·L⁻1, while CP2 is highly sensitive to CrO₄2⁻ with a KSV of 1.47 × 105 M⁻1 and LOD of 0.65 μmol·L⁻1. Both materials demonstrate reversible fluorescence quenching over multiple cycles. These results indicate that CP1 and CP2 are promising luminescent probes for the sensitive and recyclable detection of environmentally hazardous ions, offering potential for real-time water quality monitoring.