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IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2024-09-13 DOI:10.1016/j.jphotochem.2024.116028

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引用次数: 0

摘要

汞（Hg2+）及其相关化合物对人类的剧毒已引起科学界的严重关注。本文介绍了一种含有有效荧光探针--(E)-3-(((4-(苯并[d]恶唑-2-基)苯基)亚氨基)甲基)-2-甲氧基-2H-色烯-4-醇（BPMC）的色酮-苯并恶唑，用于选择性和特异性检测 Hg2+ 离子，其检测和定量限在 µM 范围内。由于 BPMC 中的分子内电荷转移（ICT）和激发态分子内质子转移（ESIPT）过程受到抑制，在 365 纳米紫外灯下，BPMC 溶液（水-DMSO 混合液，50% v/v）的光致发光明显增强，显示出低强度到高强度的蓝紫色光致发光。此外，为了实现对 Hg2+ 离子的现场检测，并考察所开发探针的实用性，我们制作了一种基于 BPMC 染色纸条的检测试剂盒，并证明了其现场检测的实用性。通过 1H NMR、FT-IR 和高分辨率质谱分析，我们揭示了检测机制的细节。本报告为定制基于 ICT 和 ESIPT 的色氟探针提供了一个更广阔的视角，以加速其在现实世界中的应用和环境监测。

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A ‘Turn-on’ fluorogenic probe for selective and specific detection of Hg(II) ions

Mercury (Hg²⁺) and its associated compounds have drawn serious concern from the scientific communities for their extreme toxicity to human beings. The present article introduced a chromone-benzoxazole embracing an effective fluorogenic probe, (E)-3-(((4-(benzo[d]oxazol-2-yl) phenyl) imino) methyl)-2-methoxy-2H-chromen-4-ol (BPMC) for selective and specific detection of Hg²⁺ ions having detection and quantification limit in the µM range. A significant photoluminescence enhancement has been observed from BPMC solution (water-DMSO mixture, 50 % v/v) displaying low to highly intense blue-violet photoluminescence under a 365 nm UV lamp due to the inhibition of intramolecular charge transfer (ICT) and excited state intramolecular proton transfer (ESIPT) processes involved in BPMC. Furthermore, to achieve on-site detection of Hg²⁺ ions and investigate the practical utility of our developed probe, we have fabricated a BPMC-stained paper-strips-based test kit and demonstrated its practical effectiveness for on-spot detection. The details of the detection mechanism have been revealed through ¹H NMR, FT-IR, and high-resolution mass spectrometric analysis. The present report evokes a broader perspective for tailoring ICT and ESIPT-based chromo-fluorogenic probes to accelerate their real-world application and environmental monitoring.

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来源期刊

Journal of Photochemistry and Photobiology A-chemistry 化学-物理化学

CiteScore

7.90

自引率

7.00%

发文量

580

审稿时长

48 days

期刊介绍： JPPA publishes the results of fundamental studies on all aspects of chemical phenomena induced by interactions between light and molecules/matter of all kinds. All systems capable of being described at the molecular or integrated multimolecular level are appropriate for the journal. This includes all molecular chemical species as well as biomolecular, supramolecular, polymer and other macromolecular systems, as well as solid state photochemistry. In addition, the journal publishes studies of semiconductor and other photoactive organic and inorganic materials, photocatalysis (organic, inorganic, supramolecular and superconductor). The scope includes condensed and gas phase photochemistry, as well as synchrotron radiation chemistry. A broad range of processes and techniques in photochemistry are covered such as light induced energy, electron and proton transfer; nonlinear photochemical behavior; mechanistic investigation of photochemical reactions and identification of the products of photochemical reactions; quantum yield determinations and measurements of rate constants for primary and secondary photochemical processes; steady-state and time-resolved emission, ultrafast spectroscopic methods, single molecule spectroscopy, time resolved X-ray diffraction, luminescence microscopy, and scattering spectroscopy applied to photochemistry. Papers in emerging and applied areas such as luminescent sensors, electroluminescence, solar energy conversion, atmospheric photochemistry, environmental remediation, and related photocatalytic chemistry are also welcome.