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<p>A cubane-type Cu<sub>4</sub>I<sub>4</sub> cluster 3-PhPy<sub>4</sub>Cu<sub>4</sub>I<sub>4</sub> (<b>1</b>) was designed and synthesized (3-PhPy = 3-phenylpyridine). The cluster was characterized by elemental analysis, X-ray diffraction, FTIR and UV-Vis spectroscopic analysis. Single-crystal X-ray diffraction revealed that cluster <b>1</b> presents a supramolecular interlocking chain structure. Similar cluster 4-PhPy<sub>4</sub>Cu<sub>4</sub>I<sub>4</sub> (<b>2</b>) was also prepared and re-determined. The TD-DFT calculations reveal that their UV-Vis absorption and luminescence originate from the hybrid [(X + M)LCT] excited states. Based on the cluster <b>1</b>, a paper-based sensor (<b>1)</b> was prepared through a composite process, it shows a remarkable PL quenching response for pyridine (Py) / cyclohexylamine (CYA) detection with good selectivity. Using this sensor, an amazing sensing speed of T<sub>90</sub> = 5&#xa0;s was achieved for the detection of Py and T<sub>90</sub> = 10&#xa0;s for CYA. In the fluorescence sensing response of these two volatile organic compounds, their maximum fluorescence quenching efficiency reached outstanding 98%. The sensor (<b>2</b>) based on cluster <b>2</b> also demonstrated similar fluorescence sensing performance for selective detection of Py or CYA.</p>

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Pyridine and Cyclohexylamine Fluorescence Paper Sensors Based on Two cubane-type Cu4I4 Clusters

  • 期刊论文

  • 发表日期：

    2025年4月5日

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  • Xin-Yang Du,
  • Li Song,
  • Xin-Yu Wei,
  • Ying-Ying Zhang,
  • Yu-Xin Zhang,
  • Xia-Qun Zeng,
  • Hao-Nan Hu,
  • Zhou-Hang Jiang,
  • Yong Zhang,
  • Wen-Xiang Chai

摘要

A cubane-type Cu4I4 cluster 3-PhPy4Cu4I4 (1) was designed and synthesized (3-PhPy = 3-phenylpyridine). The cluster was characterized by elemental analysis, X-ray diffraction, FTIR and UV-Vis spectroscopic analysis. Single-crystal X-ray diffraction revealed that cluster 1 presents a supramolecular interlocking chain structure. Similar cluster 4-PhPy4Cu4I4 (2) was also prepared and re-determined. The TD-DFT calculations reveal that their UV-Vis absorption and luminescence originate from the hybrid [(X + M)LCT] excited states. Based on the cluster 1, a paper-based sensor (1) was prepared through a composite process, it shows a remarkable PL quenching response for pyridine (Py) / cyclohexylamine (CYA) detection with good selectivity. Using this sensor, an amazing sensing speed of T90 = 5 s was achieved for the detection of Py and T90 = 10 s for CYA. In the fluorescence sensing response of these two volatile organic compounds, their maximum fluorescence quenching efficiency reached outstanding 98%. The sensor (2) based on cluster 2 also demonstrated similar fluorescence sensing performance for selective detection of Py or CYA.