Ethyl 3-aminobenzo[b]thiophene-2-carboxylate Derived Ratiometric Schiff Base Fluorescent Sensor for the Recognition of In3+ and Pb2+

被引：3
|
作者：
Zhu, Shifeng [1 ]
Yang, Liangru [1 ]
Zhao, Yingying [1 ]
机构：
[1] Henan Univ Technol, Coll Chem & Chem Engn, Zhengzhou 450001, Peoples R China
来源：
JOURNAL OF FLUORESCENCE | 2024年 / 35卷 / 2期
基金：
中国国家自然科学基金;
关键词：
Benzo[b]thiophene; Ratiometric sensor; Schiff base; Indium; TURN-ON SENSOR; INDIUM DETERMINATION; CHEMOSENSOR; WATER; SPECTROMETRY; SAMPLES; PROBE; ZN2+;
D O I：
10.1007/s10895-023-03576-7
中图分类号：
Q5 [生物化学];
学科分类号：
071010 ; 081704 ;
摘要：
An ethyl 3-aminobenzo[b]thiophene-2-carboxylate derived ratiometric Schiff base fluorescent sensor R was devised and synthesized. R exhibited a highly sensitive and selective ratiometric response to In3+ in DMF/H2O tris buffer solution. R exhibited a colorimetric/fluorescent dual-channel response to In3+. More importantly, R can distinguish In3+ from Ga3+ and Al3+ in less than 5 min. R exhibited a good linear correlation with the concentration of In3+ in the 5-25 mu M range and the limit of detection for In3+ was found to be 8.36 x 10(-9) M. According to the job`s plot and MS spectra, R formed a complex with In3+ at 1:2 with a complexation constant of 8.24 x 10(9) M-2. Based on Gaussian theory calculations, the response mechanism of R to In3+ can be explained by photo-induced electron transfer (PET) and intramolecular charge transfer (ICT) mechanisms. In addition, R can be used for the detection of indium in tap water with satisfactory recoveries. Meanwhile, R displayed a linear relationship to micromolar concentrations (0-50 mu M) of Pb2+ and recognized Pb2+ in a ratiometric response with a detection limit of 8.3 x 10(-9) M.
引用
收藏
页码：943 / 953
页数：11
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