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<p>Polymer dots (PT-PDs) were obtained through a “synthesis-modification integration” method by using polyethyleneimine (PEI) and tartaric acid (TA) as raw materials. The designed PT-PDs displayed a nanoscale structure with an average size of 1.6&#xa0;nm, and bright blue fluorescence (FL) emission with a fluorescence quantum yield (QY) of 14.3%. Moreover, the PT-PDs were used as a sensing platform for the sensitive and quantitative detection of tetracyclines (TCs) and Al<sup>3+</sup> via fluorescence quenching and recovery. The LODs for tetracycline hydrochloride (TCH), doxycycline (DOX), and Al<sup>3+</sup> were 94.8&#xa0;nM, 76.7&#xa0;nM, and 177.8&#xa0;nM, respectively. In addition, PT-PDs incorporated with polyacrylamide were used for the recognition of TCs and Al<sup>3+</sup> in a portable manner on the basis of the fluorescence “ON–OFF-ON” strategy, which revealed great application in the field of anti-counterfeiting and encryption.</p> Graphical Abstract <p></p>

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Facile preparation of polymer dots for tetracycline and Al3+ detection and exploration of anti-counterfeiting applications via the fluorescence “ON–OFF-ON” strategy

  • 期刊论文

  • 发表日期：

    2025年3月17日

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  • Zhonghao Li,
  • Zherui Wan,
  • Xiaoxu Cui,
  • Qi Chen,
  • Yue Hua,
  • Guang Yang

摘要

Polymer dots (PT-PDs) were obtained through a “synthesis-modification integration” method by using polyethyleneimine (PEI) and tartaric acid (TA) as raw materials. The designed PT-PDs displayed a nanoscale structure with an average size of 1.6 nm, and bright blue fluorescence (FL) emission with a fluorescence quantum yield (QY) of 14.3%. Moreover, the PT-PDs were used as a sensing platform for the sensitive and quantitative detection of tetracyclines (TCs) and Al3+ via fluorescence quenching and recovery. The LODs for tetracycline hydrochloride (TCH), doxycycline (DOX), and Al3+ were 94.8 nM, 76.7 nM, and 177.8 nM, respectively. In addition, PT-PDs incorporated with polyacrylamide were used for the recognition of TCs and Al3+ in a portable manner on the basis of the fluorescence “ON–OFF-ON” strategy, which revealed great application in the field of anti-counterfeiting and encryption.

Graphical Abstract