一种用于饮用水和草药茶样品中 Al 感测的新型酚酞基荧光传感器。
A novel phenolphthalein-based fluorescent sensor for Al sensing in drinking water and herbal tea samples.
机构信息
Department of Chemistry, Kamil Ozdag Science Faculty, Karamanoglu Mehmetbey University, 70100 Karaman, Turkey.
Department of Chemistry, Kamil Ozdag Science Faculty, Karamanoglu Mehmetbey University, 70100 Karaman, Turkey.
出版信息
Food Chem. 2021 Feb 1;337:127659. doi: 10.1016/j.foodchem.2020.127659. Epub 2020 Jul 25.
In this study, 3,3-bis(4-hydroxy-3-((E)-((4-hydroxyphenyl)imino)methyl) phenyl)isobenzofuran-1(3H)-one (HMBP) was designed as a ''turn-on″ fluorogenic chemosensor to detect Al. Studies were performed in CHOH-HEPES (v/v, 9/1, pH 7.0) media at λ = 475 nm. The LOD value was found to be 0.113 µM. The stoichiometric ratio of HMBP-Al was determined as 1:2 by Job's plot and ESI-MS as well as H NMR titration. The binding constant of chemosensor HMBP with Al from the Benesi-Hildebrand equation was determined to be 1.21 × 10 M. The quantum (Φ) yields were obtained as 0.040 and 0.775 for the chemosensor HMBP and HMBP-Al, respectively. The response of the chemosensor HMBP towards Al was attributed to the strategies of blocking the photo-induced electron transfer (PET) and CN isomerisation mechanisms. Finally, the sensing of the chemosensor HMBP for the determination of Al in real food samples, drinking waters and herbal teas, were employed.
在这项研究中，3,3-双（4-羟基-3-（（E）-（（4-羟基苯基）亚氨基）甲基）苯基）异苯并呋喃-1（3H）-酮（HMBP）被设计为一种“开启”荧光化学传感器来检测 Al。在 CHOH-HEPES（v/v，9/1，pH 7.0）介质中于 λ = 475 nm 下进行研究。发现 LOD 值为 0.113 µM。通过 Job 图、ESI-MS 以及 H NMR 滴定确定 HMBP-Al 的化学计量比为 1:2。从 Benesi-Hildebrand 方程确定化学传感器 HMBP 与 Al 的结合常数为 1.21×10 M。量子（Φ）产率分别为 0.040 和 0.775，对于化学传感器 HMBP 和 HMBP-Al。化学传感器 HMBP 对 Al 的响应归因于阻断光诱导电子转移（PET）和 CN 异构化机制的策略。最后，采用化学传感器 HMBP 对实际食品样品、饮用水和草药茶中 Al 的测定。
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