Push-pull electronic effects on benzothiazole derived probes for the detection of Zn2+: Exploring the sensing strategies and its applications

文献类型： 外文期刊

第一作者： Muthusamy, Selvaraj

作者： Muthusamy, Selvaraj;Rajalakshmi, Kanagaraj;Xie, Meng;Xu, Yuanguo;Kannan, Palanisamy;Seo, Yeonggil;Song, Jong-Won;Lodi, Rathna Silviya

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关键词： Distinctive electronic effect; Colorimetric-fluorimetric probes; ESIPT-ICT; Real sample analysis; Practical applications

期刊名称：DYES AND PIGMENTS （ 影响因子：5.122； 五年影响因子：4.36 ）

ISSN： 0143-7208

年卷期： 2022 年 207 卷

页码：

收录情况： SCI

摘要： The diverse polarity of electron-donating 4-(diethylamino)salicylaldehyde (S-D), and electron-withdrawing 4-nitrosalicylaldehyde (S-W) were conjugated with benzothiazole (BT) to develop BTS-D and BTS-W probes, respectively. The probes exhibited the excited-state intramolecular proton transfer and intramolecular charge transfer sensing mechanisms in detecting Zn2+. BTS-D and BTS-W achieved a quantitative detection of Zn2+ followed by a strong cyan to green in the emission spectra, and from colorless to yellow in the UV-Vis spectra, respectively. The sensing pathways and coordination affinities between the probes and Zn2+ were explored using a series of spectroscopic evaluations, 1H NMR, 1H-1H COSY (2D NMR), HR-MS, XPS and DFT calculations. The probes demonstrated excellent selectivity, good water solubility, and high sensitivity, securing low LOD values: 0.15 mu M for BTS-W in colorimetric analysis and 14 nM for BTS-D in fluorimetric analysis in aqueous media. The advantages of the probes assessed for the detection of Zn2+ in various water samples, Whatman paper-based sensor strips, and PC3 live cells. The findings revealed the encouraging on-site visualization in wastewater systems and bio-contents.

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