School of Chemistry and Chemical Engineering, Hunan Key Laboratory for the Design and Application of Actinide Complexes, University of South China, 28 Changsheng West Road, Hengyang, Hunan 421001, PR China.
School of Chemistry and Chemical Engineering, Hunan Key Laboratory for the Design and Application of Actinide Complexes, University of South China, 28 Changsheng West Road, Hengyang, Hunan 421001, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2021 May 15;253:119589. doi: 10.1016/j.saa.2021.119589. Epub 2021 Feb 16.
In this paper, we specifically designed and synthesized an excellent colorimetric and ratiometric fluorescent sensor DPA-CI for rapid and convenient detection of the highly toxic phosgene. DPA-CI was developed by incorporated a diphenylamine (DPA) and a 2-imine-3-benzo[d]imidazole as the enhanced push-pull electronic structure into the coumarin fluorophore matrix. The sensor DPA-CI towards phosgene sensing exhibited both visible colorimetric and ratiometric fluorescent color change in solution and in gaseous conditions with TICT and AIE mechanism respectively, which can be easily distinguished by using the naked eye. Also, the sensor DPA-CI showed splendid sensing performance such as excellent selectivity, rapid response (less than 8 s in THF and 2 min in gaseous condition), and fair sensitivity (limit of detection less than 0.11 ppm in gaseous condition and 0.27 μM in solution). The design strategy based on enhanced push-pull electronic structure with AIE and TICT properties will be helpful to construct a solid optical sensor with excellent potential application prospects for portable and visual sensing of gaseous phosgene through distinct color and ratiometric fluorescence change by the naked eyes.
在本文中，我们专门设计并合成了一种出色的比色和比率荧光传感器 DPA-CI，用于快速便捷地检测高毒性光气。DPA-CI 是通过将二苯胺（DPA）和 2-亚胺-3-苯并[d]咪唑作为增强的推拉电子结构引入香豆素荧光团基质而开发的。该传感器 DPA-CI 对光气的传感在溶液中和气体状态下分别表现出可见的比色和比率荧光颜色变化，分别通过 TICT 和 AIE 机制，可通过肉眼轻松识别。此外，该传感器 DPA-CI 表现出出色的传感性能，如优异的选择性、快速响应（THF 中小于 8 s，气体条件下小于 2 min）和良好的灵敏度（气体条件下的检测限小于 0.11 ppm，溶液中小于 0.27 μM）。基于具有 AIE 和 TICT 性质的增强推拉电子结构的设计策略将有助于构建一种固态光学传感器，通过肉眼观察到明显的颜色和比率荧光变化，具有出色的潜在应用前景，可用于便携式和可视化气体光气的传感。
