一种新的席夫碱源于 5-(噻吩-2-基)恶唑作为“关-开-关”荧光传感器，用于顺序监测铟和铁离子及其应用。
A new Schiff base derived from 5-(thiophene-2-yl)oxazole as "off-on-off" fluorescence sensor for monitoring indium and ferric ions sequentially and its application.
机构信息
School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.
Henan Sanmenxia Aoke Chemical Industry Co. Ltd., Sanmenxia 472000, China.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2023 May 5;292:122376. doi: 10.1016/j.saa.2023.122376. Epub 2023 Jan 18.
A new Schiff base sensor (E)-N'-((8-hydroxy-2,3,6,7-tetrahydro-1H,5H-pyrido[3,2,1-ij]quinolin-9-yl)methylene)-5-(thiophen-2-yl)oxazole-4-carbohydrazide (TOQ) was synthesized and found to emit yellowish green fluorescence upon introduction of In. Furthermore, the resulting complex TOQ-In was quenched selectively by Fe. The detection limits of TOQ for In and Fe were 1.75 × 10 M and 8.45 × 10 M, respectively. The complex stoichiometry of TOQ with target ions was determined to be 1:2 via Job's plot analysis, which further was verified by ESI-MS titration and theoretical calculations. Moreover, TOQ can be used for the determination of target ions in environmental water samples. A portable paper sensor of TOQ was successfully developed for detecting In to assess its applicability.
一种新的席夫碱传感器（E）-N'-((8-羟基-2,3,6,7-四氢-1H,5H-吡啶并[3,2,1-ij]喹啉-9-基)亚甲基)-5-(噻吩-2-基)恶唑-4-甲酰肼（TOQ）被合成，并发现其在引入 In 后发出淡黄色绿色荧光。此外，所得的 TOQ-In 配合物被 Fe 选择性猝灭。TOQ 对 In 和 Fe 的检测限分别为 1.75×10 M 和 8.45×10 M。通过 Job 图分析确定 TOQ 与目标离子的配合物化学计量比为 1:2，进一步通过 ESI-MS 滴定和理论计算得到验证。此外，TOQ 可用于测定环境水样中的目标离子。成功开发了一种用于检测 In 的 TOQ 便携式纸质传感器，以评估其适用性。
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