双癸酸
荧光
分子
发光
持续发光
发光测量
能量转移
纳米技术
费斯特共振能量转移
光化学
材料科学
化学
光电子学
有机化学
植物
物理
孢子
量子力学
分子物理学
生物
热释光
作者
Pei‐Pei Zhang,Ai‐Yun Ni,Jianjun Zhang,Bolun Zhang,Huajun Zhou,He Zhao,Shu‐Qin Liu,Jun Ni,Chunying Duan
标识
DOI:10.1016/j.snb.2023.133624
摘要
Rapidly detecting 2, 6-dipicolinic acid (DPA, an anthrax biomarker) in a highly sensitive manner is vital due to DPA being highly lethal to human beings and animals. However, most reported DPA probes are ‘‘turn-on’ type, while luminescent recovery probes (LRPs) are still rare. Herein, a unique Tb-MOF (1) LRP was tailor-made, and its function is achieved via an energy transfer regulation strategy. In 1, the characteristic luminescence from Tb3+ is not sensitized due to the lack of energy transfer from the carefully chosen ligand that also induces steric effects to allow solvent molecules to be coordinated to Tb3+. During detection, DPA replaces the solvent molecules and thus effectively sensitizes the emission from Tb3+, achieving recovery response. 1 exhibits highly selective sensing of DPA down to 1.7 μM, and displays an obvious luminescence color change visible to naked eyes. Furthermore, a regular smartphone platform installed with a Color Recognizer App can achieve sensitive, real-time, and on-site detection of DPA. The probe can also be used for the effective detection of DPA in tap water, rainwater, and human serum. The work not only provides a route to the preparation of recovery probes but also proves the potential of such probes.
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