Chen Xiaoli, Zheng Haixia, Li Xinyi, Ruan Zhijun, Lu Qiqi, He Wentao, Lin Junqi, Ran Jingwen, Liu Shanshan
Hubei Key Laboratory of Processing and Application of Catalytic Materials, College of Chemistry and Chemical Engineering, Huanggang Normal University, Huanggang 438000, China.
Hubei Key Laboratory of Processing and Application of Catalytic Materials, College of Chemistry and Chemical Engineering, Huanggang Normal University, Huanggang 438000, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2024 Jan 15;305:123482. doi: 10.1016/j.saa.2023.123482. Epub 2023 Oct 2.
A new AIE-based luminogen TPES, as a ratiometric fluorescence probe for mercury(II) was readily synthesized. The probe combined the advantages of the outstanding specificity of Hg-triggered deprotection reaction of thioketal and the brilliant emission of AIEgens in aggregated state. Once encountered aqueous Hg, fluorescent color of TPES in THF-HO (f = 98%) altered from blue to green rapidly, while other metal cations gave no interference to the probe. And the mechanism of this chemosensor was carefully verified by H NMR analysis, FTIR and MS spectra. As expected, TPES exhibits excellent selectivity and sensitivity towards Hg in the solid state. When using filter paper as the solid medium, the fabricated test strips could signify Hg ions with the LOD as 1 × 10 M (Hg in aqueous solution), accompanied with a distinct emitting altered from blue to green. Furthermore, by changing the medium from filter paper to silica gel plate, a more significant fluorescence alteration from blue to yellow was achieved, and the LOD was further optimized to 1 × 10 M as discerned by naked-eye.
一种新型的基于聚集诱导发光（AIE）的发光分子TPES被成功合成，作为汞（II）的比率荧光探针。该探针结合了硫缩酮的汞触发去保护反应的出色特异性以及AIEgens在聚集状态下的明亮发光的优点。一旦遇到水溶液中的汞，TPES在THF-H₂O（f = 98%）中的荧光颜色会迅速从蓝色变为绿色，而其他金属阳离子对该探针没有干扰。并且通过¹H NMR分析、FTIR和质谱对这种化学传感器的机理进行了仔细验证。正如预期的那样，TPES在固态下对汞表现出优异的选择性和灵敏度。当使用滤纸作为固体介质时，制备的测试条能够以1×10⁻⁶ M（水溶液中的汞）的检测限指示汞离子，同时伴随着从蓝色到绿色的明显发光变化。此外，通过将介质从滤纸改为硅胶板，实现了从蓝色到黄色的更显著的荧光变化，并且通过肉眼观察检测限进一步优化到1×10⁻⁷ M。
