用于痕量有机砷检测的超高灵敏度乙烯基-COF 荧光传感器。

IF 1.8 4区 化学 Q3 CHEMISTRY, ANALYTICAL
Wenyang Li, Qiangrong Xie
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引用次数: 0

摘要

近来,有机砷饲料添加剂(如洛克沙砷(ROX))的滥用日益危害人类健康和环境。为此,我们利用 2, 3, 5, 6-四甲基吡嗪(TMP)和对苯二甲醛(TPA)之间的碱催化反应,合成了一种独特的富电子吡嗪涂层荧光共价有机框架(COF)纳米片,命名为 COF-TMP。表征结果表明,COF-TMP 具有高孔隙率、明显的荧光和丰富的 (E)-2-styrylpyrazine (SPA) 基团。这些特性使其成为超高灵敏度检测缺电子 ROX 分子的特殊荧光传感器。通过荧光淬灭滴定实验发现,COF-TMP 检测 ROX 的检测限(LOD)为 0.015 ppb,超过了之前报道的所有荧光传感器。实验结果和理论计算相结合表明,COF-TMP 对 ROX 的超强检测能力源于一种静态淬灭机制。这项研究不仅为一种新型吡嗪基荧光 COF 纳米片铺平了道路,这种纳米片具有高孔隙率、优异的荧光性能和丰富的 SPA 基团,适用于高灵敏度和高选择性的 ROX 检测,而且还暗示了其作为荧光传感器在环境污染管理和相关领域的潜在应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Ultrahigh-sensitivity vinyl-COF fluorescent sensor for trace organic arsenic detection.

Recently, the misuse of organic arsenic feed additives, such as roxarsone (ROX), has increasingly jeopardized both human health and the environment. In response, a unique electron-rich pyrazine-cored fluorescent covalent organic framework (COF) nanosheet, named as COF-TMP, was synthesized using an alkali-catalyzed reaction between 2, 3, 5, 6-tetramethylpyrazine (TMP) and terephthalaldehyde (TPA). Characterization demonstrated that COF-TMP boasted high porosity, pronounced fluorescence, and an abundance of (E)-2-styrylpyrazine (SPA) groups. These attributes render it an exceptional fluorescent sensor for the ultrahigh sensitivity detection of electron-deficient ROX molecules. The limit of detection (LOD) for COF-TMP in detecting ROX was found to be 0.015 ppb through fluorescence-quenching titration experiments-surpassing all previously reported fluorescent sensors. A combination of experimental results and theoretical calculations suggests that the extraordinary detection capability of COF-TMP for ROX arises from a static quenching mechanism. This study paves the way not only for a novel pyrazine-based fluorescent COF nanosheet with high porosity, exceptional fluorescent capabilities, and abundant SPA groups suitable for highly sensitive and selective ROX detection but also hints at its potential application as a fluorescent sensor for environmental pollution management and related domains.

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来源期刊
Analytical Sciences
Analytical Sciences 化学-分析化学
CiteScore
2.90
自引率
18.80%
发文量
232
审稿时长
1 months
期刊介绍: Analytical Sciences is an international journal published monthly by The Japan Society for Analytical Chemistry. The journal publishes papers on all aspects of the theory and practice of analytical sciences, including fundamental and applied, inorganic and organic, wet chemical and instrumental methods. This publication is supported in part by the Grant-in-Aid for Publication of Scientific Research Result of the Japanese Ministry of Education, Culture, Sports, Science and Technology.
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