基于单吡咯烷脲的水相焦磷酸比色化学传感器。
A colorimetric chemosensor for pyrophosphate based on mono-pyrenylurea in aqueous media.
机构信息
College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, Heilongjiang 161006, PR China.
College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, Heilongjiang 161006, PR China.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2020 Nov 5;241:118658. doi: 10.1016/j.saa.2020.118658. Epub 2020 Jul 3.
Research on pyrophosphate ions detection remains important because it plays crucial roles in various fields. A simple and new colorimetric sensor for pyrophosphate (PPi) based on mono-pyrenylurea ligand (L) has been designed and synthesized by a simple reaction of 1-pyrenemethylamine hydrochloride with p-nitrophenylisocyanate. In DMSO-15% HO solution and DMSO-15% HEPES (10 mM, pH = 7.2) buffer solution, L displayed a selective colorimetric response for pyrophosphate (PPi) against other anions by changing color from colorless to yellow. This recognition process was confirmed by UV-vis spectroscopy. Also, the colorimetric properties of L are attributed to the anion-induced deprotonation of the urea subunit as demonstrated by H NMR titration method. Moreover, convenient test strips coated with L could be utilized to detect PPi in aqueous solution by naked-eye.
焦磷酸盐离子检测的研究仍然很重要，因为它在各个领域都起着至关重要的作用。本文通过 1- （ 对 - 硝基苯甲酰基 ） 氨基 - 吡咯烷与对 - 硝基异氰酸苯酯的简单反应，设计并合成了一种基于单 - 吡咯基脲配体（ L ）的简单新的焦磷酸盐（ PPi ）比色传感器。在 DMSO-15% HO 溶液和 DMSO-15% HEPES （ 10 mM ， pH = 7.2 ）缓冲溶液中， L 对焦磷酸盐（ PPi ）表现出选择性的比色响应，颜色由无色变为黄色。这一识别过程通过紫外 - 可见光谱得到了证实。此外，通过核磁共振滴定法证明， L 的比色性质归因于脲亚基的阴离子诱导去质子化。此外，涂有 L 的方便试条可用于通过肉眼检测水溶液中的 PPi 。
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