School of Chemistry and Chemical Engineering, University of Jinan, No. 336, West Road of Nan Xinzhuang, Jinan 250022, Shandong, China.
School of Chemistry and Chemical Engineering, University of Jinan, No. 336, West Road of Nan Xinzhuang, Jinan 250022, Shandong, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2020 Oct 15;240:118539. doi: 10.1016/j.saa.2020.118539. Epub 2020 May 28.
In this study, we present the classical Michael's addition reaction-based sensing scheme for volatile organic amine reagents such as ethylenediamine, N, N-dimethylethylenediamine and diethylenetriamine using a near-infrared fluorescent dye TCF1. Obvious spectral changes in the UV-vis absorption and fluorescence spectra of TCF1 were observed upon addition of these amine reagents with an effective catalyst DBU, resulting in significant and fast color changes detectable by the naked-eye. TCF1 showed an efficient response to these amine reagents with a low detection limit, especially for diethylenetriamine. NMR and MS spectral analysis proved that the mechanism of the detection was based on the classical Michael addition, which was also verified by the theoretical calculations. In addition, a portable test paper incorporated with TCF1 had also successfully realized the detection of a low concentration of these amine reagents.
在这项研究中，我们使用近红外荧光染料 TCF1 呈现了基于经典迈克尔加成反应的对挥发性有机胺试剂（如乙二胺、N,N-二甲基乙二胺和二乙烯三胺）的传感方案。当加入这些胺试剂和有效催化剂 DBU 时，TCF1 的紫外-可见吸收光谱和荧光光谱会发生明显的光谱变化，导致肉眼可检测的显著且快速的颜色变化。TCF1 对这些胺试剂具有高效的响应，检测限低，特别是对二乙烯三胺。NMR 和 MS 光谱分析证明了检测的机制基于经典的迈克尔加成反应，这也通过理论计算得到了验证。此外，一种便携式试纸上加入了 TCF1，也成功地实现了对低浓度这些胺试剂的检测。
