基于方酸菁的化学传感器对水溶液中Fe离子的特异性比色检测。
Specific colorimetric detection of Fe ions in aqueous solution by squaraine-based chemosensor.
作者信息
Liu Xiaoqian, Li Na, Xu Min-Min, Wang Jianhao, Jiang Chunhui, Song Guoqiang, Wang Yong
机构信息
School of Pharmaceutical Engineering and Life Science, Changzhou University 213164 Jiangsu China
College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou 215123 PR China
出版信息
RSC Adv. 2018 Oct 11;8(61):34860-34866. doi: 10.1039/c8ra07345g. eCollection 2018 Oct 10.
A new squaraine based chemosensor TSQ was developed for colorimetric detection of Fe ions. A thymine moiety in TSQ was constructed to act as an ion acceptor. The sensor displayed an instant colorimetric response specific to Fe over the other metal ions in 20% AcOH-HO solution. The limit of detection was much lower than that of the environmental protection agency guideline (5.37 μM) in drinking water. A 1 : 1 binding between TSQ and Fe ion was evidenced by Job's plot measurement, ESI-MS and Fourier transform infrared (IR) measurements. Moreover, the proposed sensing mechanism of the receptor towards Fe was strongly supported by DFT calculation. Finally, the sensor has proven to be suitable in real sample applications.
开发了一种基于方酸菁的新型化学传感器TSQ用于比色法检测铁离子。TSQ中的胸腺嘧啶部分被构建为离子受体。该传感器在20%乙酸-水（AcOH-H₂O）溶液中对铁离子表现出即时比色响应，与其他金属离子相比具有特异性。检测限远低于环境保护局饮用水指南（5.37 μM）。通过Job曲线测量、电喷雾电离质谱（ESI-MS）和傅里叶变换红外（IR）测量证明了TSQ与铁离子之间存在1:1的结合。此外，密度泛函理论（DFT）计算有力地支持了所提出的受体对铁离子的传感机制。最后，该传感器已被证明适用于实际样品应用。
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