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<p>A novel Zn-based luminescent coordination polymer [Zn(phen)(H<sub>2</sub>O)]<sub>2</sub>[L]·2H<sub>2</sub>O (<b>1</b>), [H<sub>4</sub>L=(<i>E</i>)-5,5′-(diazene-1,2-diyl) diisophthalic acid] was synthesized <i>via</i> a solvothermal reaction, which has a three-dimensional supramolecular structure. Compound <b>1</b> exhibits good chemical and thermal stability, and can effectively detect nitroaromatic explosives (NACs) <i>via</i> a fluorescence quenching effect. Especially for 2,4,6-trinitrophenol, compound <b>1</b> has demonstrated very high sensitivity (<i>K</i><sub>SV</sub>=1.9×10<sup>4</sup> L/mol), low detection limit (LOD=9.6×10<sup>−6</sup> mol/L) and good anti-interference ability. Additionally, Compound <b>1</b> also exhibits good selective recognition of Fe<sup>3+</sup> with excellent anti-interference performance and reusability. Through UV-visible spectroscopy and density functional theory calculations, the fluorescence quenching mechanisms of compound <b>1</b> for various analytes are discussed in detail. Based on the above excellent properties of compound <b>1</b>, it has great application potential in water quality monitoring.</p>

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A Robust Zn-based Coordination Polymer for Ultra-sensitive and Selective Detection of Trace 2,4,6-Trinitrophenol and Fe3+ in Aqueous Solution

  • 期刊论文

  • 发表日期：

    2026年2月7日

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  • Guang Hu,
  • Nanxi Zhang,
  • Xiangyu Li,
  • Liyan Zhao,
  • Xiao Zhang,
  • Xin Li,
  • Xinyi Zhou,
  • Weidong Liu,
  • Liting Wang,
  • Bing Li,
  • Wang Zixi Zhang,
  • Minghang Lü

摘要

A novel Zn-based luminescent coordination polymer [Zn(phen)(H2O)]2[L]·2H2O (1), [H4L=(E)-5,5′-(diazene-1,2-diyl) diisophthalic acid] was synthesized via a solvothermal reaction, which has a three-dimensional supramolecular structure. Compound 1 exhibits good chemical and thermal stability, and can effectively detect nitroaromatic explosives (NACs) via a fluorescence quenching effect. Especially for 2,4,6-trinitrophenol, compound 1 has demonstrated very high sensitivity (KSV=1.9×104 L/mol), low detection limit (LOD=9.6×10−6 mol/L) and good anti-interference ability. Additionally, Compound 1 also exhibits good selective recognition of Fe3+ with excellent anti-interference performance and reusability. Through UV-visible spectroscopy and density functional theory calculations, the fluorescence quenching mechanisms of compound 1 for various analytes are discussed in detail. Based on the above excellent properties of compound 1, it has great application potential in water quality monitoring.