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<p>The utilization of metal-organic frameworks (MOFs) as luminescent sensors towards specific ions or molecular sensing has garnered significant attention, owing to their porous and easy-decorated feature. Herein, a Cu-based MOF (noted as SQ-1) has been synthesized using 5-amino-isophthalic acid as a bridging ligand. The SQ-1 was structurally characterized and demonstrated good thermal and water stability. Additionally, the benign luminescent properties of the ligands suggest its potential application as a luminescent sensor for detecting various anions. Notably, SQ-1 exhibited a remarkable selective and sensitive sensing ability towards Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup> compared to other anions <i>via</i> luminescence quenching response, with the <i>K</i><sub>sv</sub> of 3.98 × 10<sup>4</sup> M<sup>−1</sup> and detection limit of 4.32 µM. The quenching mechanism has been explored. Furthermore, this Cu-based MOF shows promise as a reusable luminescent sensor, maintaining functionality over three consecutive sensing cycles.</p>

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A High Selective and Sensitive Cr2O72−sensing by a Reusable Cu-based metal-organic Framework

  • 期刊论文

  • 发表日期：

    2025年8月30日

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  • Lili Yang,
  • Ruiqin Yang,
  • Huailan Zhou,
  • Ke Su,
  • Lu Yang

摘要

The utilization of metal-organic frameworks (MOFs) as luminescent sensors towards specific ions or molecular sensing has garnered significant attention, owing to their porous and easy-decorated feature. Herein, a Cu-based MOF (noted as SQ-1) has been synthesized using 5-amino-isophthalic acid as a bridging ligand. The SQ-1 was structurally characterized and demonstrated good thermal and water stability. Additionally, the benign luminescent properties of the ligands suggest its potential application as a luminescent sensor for detecting various anions. Notably, SQ-1 exhibited a remarkable selective and sensitive sensing ability towards Cr2O72− compared to other anions via luminescence quenching response, with the Ksv of 3.98 × 104 M−1 and detection limit of 4.32 µM. The quenching mechanism has been explored. Furthermore, this Cu-based MOF shows promise as a reusable luminescent sensor, maintaining functionality over three consecutive sensing cycles.