基于希夫碱的超灵敏比色和荧光“开启”化学传感器用于水相介质中 Cu 的检测。
An ultrasensitive colorimetric and fluorescent "turn-on" chemosensor based on Schiff base for the detection of Cu in the aqueous medium.
机构信息
Department of Chemistry, University of Malakand, Khyber Pakhtunkhwa, Pakistan.
Department of Chemistry, University College in Al-Jamoum, Umm Al-Qura University, Makkah, 21955, Saudi Arabia.
出版信息
Environ Monit Assess. 2023 May 3;195(6):633. doi: 10.1007/s10661-023-11260-3.
We designed and synthesized a fluorescent "turn-on" and colorimetric chemosensor ((E)-1-((p-tolylimino)methyl)naphthalen-2-ol) SB. The structure of the synthesized chemosensor was investigated by H NMR, FT-IR, and fluorescence spectroscopy, and its sensing properties were studied toward Mn, Cu, Pb, Cd, Na, Ni, Al, K, Ag, Zn, Co, Cr, Hg, Ca, and Mg. SB showed an excellent colorimetric (yellow to yellowish brown) in MeOH and fluorescence "turn-on" sensing response to Cu in MeOH/Water (10/90, v/v) media. The sensing mechanism of SB toward Cu was investigated by FT-IR, H NMR titration, DFT studies, and Job's plot analysis. The detection limit was calculated to be very low 0.0025 µg mL (0.0025 ppm). Furthermore, the test strip containing SB also showed excellent selectivity and sensitivity toward Cu in a solution medium and when supported on a solid medium.
我们设计并合成了一种荧光“开启”和比色化学传感器 ((E)-1-((对甲苯亚氨基)甲基)萘-2-醇) SB。通过 H NMR、FT-IR 和荧光光谱研究了合成化学传感器的结构，并研究了其对 Mn、Cu、Pb、Cd、Na、Ni、Al、K、Ag、Zn、Co、Cr、Hg、Ca 和 Mg 的传感性能。SB 在 MeOH 中显示出极好的比色（黄色至黄棕色）和荧光“开启”对 MeOH/Water（10/90，v/v）介质中 Cu 的传感响应。通过 FT-IR、H NMR 滴定、DFT 研究和 Job 图分析研究了 SB 对 Cu 的传感机制。检测限计算非常低，为 0.0025µg mL（0.0025 ppm）。此外，含有 SB 的试条在溶液介质中和在固体介质上也表现出对 Cu 优异的选择性和灵敏度。
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