A visible BODIPY-based sensor for 'Naked-Eye' recognition of Ag⁺ and its application on test paper strips.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Pub Date : 2024-01-05 Epub Date: 2023-09-21 DOI:10.1016/j.saa.2023.123446

Shengling Li, Xiliang Chang, Xiangpeng Kong, Qi Wang, Feng Zhao, Jia Han, Yu Liu, Tianyuan Wang

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Abstract

In this study, a novel, highly sensitive fluorescent sensor (E)-2-((2-(benzo[d] thiazol-2-yl) quinolin-8-yl) oxy)-N'-(4-(5, 5-difluoro-1, 3, 7, 9-tetramethyl-5H-4λ⁴, 5λ⁴-dipyrrolo [1, 2-c:2', 1'-f] [1, 3, 2] diazaborinin-10-yl) benzylidene) acetohydrazide (TQB) was developed for dual mode of Ag⁺ detection (colorimetric/fluorescence), and its structural and spectral properties were characterized by ¹H NMR, ESI-MS, X-ray, ultraviolet and fluorescence photometry. It is found that TQB could specifically and efficiently identify Ag⁺ among many other metal ions in CH₃OH/H₂O (7:3 v/v, pH = 7.23) buffer. The maximum absorption wavelength of TQB is red-shifted while its fluorescence is quenched with a quenching rate of 88.7%. The energy difference between TQB and TQB-Ag⁺ complex was calculated by DFT, and the applicability of TQB was verified by paper strip test. In addition, TQB has been successfully applied to the determination of Ag⁺ in real water samples with good reversibility and recoveries.

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一种基于BODIPY的Ag+肉眼识别传感器及其在试纸条上的应用。

在本研究中，开发了一种新型的高灵敏度荧光传感器（E）-2-（（2-（苯并[d]噻唑-2-基）喹啉-8-基）氧基）-N’-（4-（5,5-二氟-1,3,7,9-四甲基-5H-4λ4,5λ4-二吡咯并[1，2-c:2'，1'-f][1,3,2]二氮唑啉-10-基）亚苄基）乙酰酰肼（TQB），用于Ag+双模式检测（比色/荧光），并用1H NMR、ESI-MS、X射线、紫外光谱和荧光光谱对其结构和光谱性质进行了表征。在CH3OH/H2O（7:3v/v，pH=7.23）缓冲液中，TQB可以特异有效地识别多种金属离子中的Ag+。TQB在荧光猝灭过程中，其最大吸收波长发生红移，猝灭率为88.7%。用DFT计算了TQB与TQB-Ag+配合物的能量差，并用纸片法验证了TQB的适用性。此外，TQB还成功地应用于实际水样中Ag+的测定，具有良好的可逆性和回收率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

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