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<p>A multifunctional fluorescence sensor is an important analytical method for detecting water quality. Herein, PCBH-FS, a fluorescence sensor, is first constructed by dispersing a new compound PCBH in THF-H<sub>2</sub>O (fw 60%, v/v). PCBH-FS exhibits a distinct red-shifted emission from 405 to 475&#xa0;nm and a “turn-on” fluorescence response to Fe<sup>3+</sup> and Al<sup>3+</sup> in the pH range of 5–9, and PCBH-FS exhibits a good fluorescence response to H<sup>+</sup> in the pH range from 1 to 5. The Al<sup>3+</sup>-PCBH system can be used for F<sup>−</sup> detection, while the Al<sup>3+</sup>-PCBH and Fe<sup>3+</sup>-PCBH systems can be used for sequential AcO<sup>−</sup> detection in THF/H<sub>2</sub>O mixed media. The binding ratio and the possible sensing mechanism between cations and PCBH molecules are discussed clearly. The LOD of the PCBH-FS reaches 0.44 µM, 0.36 µM, 2.02 µM, and 1.45 µM for detecting Fe<sup>3+</sup>, Al<sup>3+</sup>, F<sup>−</sup>, and AcO<sup>−</sup> in turn. The sensor provides a simple “on-off” &amp; fluorescent-shift co-detection strategy for sequential detection of multiple ions in aqueous solutions.</p>

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Preparation of a versatile fluorescence sensor for co-detecting ions in aqueous solution

  • 期刊论文

  • 发表日期：

    2026年7月31日

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  • Yuan Chen,
  • Yuzhu Chen,
  • Yiduo Li,
  • Luyue Wang,
  • Jie Ma

摘要

A multifunctional fluorescence sensor is an important analytical method for detecting water quality. Herein, PCBH-FS, a fluorescence sensor, is first constructed by dispersing a new compound PCBH in THF-H2O (fw 60%, v/v). PCBH-FS exhibits a distinct red-shifted emission from 405 to 475 nm and a “turn-on” fluorescence response to Fe3+ and Al3+ in the pH range of 5–9, and PCBH-FS exhibits a good fluorescence response to H+ in the pH range from 1 to 5. The Al3+-PCBH system can be used for F− detection, while the Al3+-PCBH and Fe3+-PCBH systems can be used for sequential AcO− detection in THF/H2O mixed media. The binding ratio and the possible sensing mechanism between cations and PCBH molecules are discussed clearly. The LOD of the PCBH-FS reaches 0.44 µM, 0.36 µM, 2.02 µM, and 1.45 µM for detecting Fe3+, Al3+, F−, and AcO− in turn. The sensor provides a simple “on-off” & fluorescent-shift co-detection strategy for sequential detection of multiple ions in aqueous solutions.