State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, PR China.
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, PR China.
J Hazard Mater. 2021 Aug 5;415:125619. doi: 10.1016/j.jhazmat.2021.125619. Epub 2021 Mar 10.
In this paper, two donor (D)-acceptor (A) type of small organic fluorescent molecules (T1 and T2) based on terpyridine group are synthesized, characterized and used as colorimetric/fluorometric dual-channel probes towards diethylchlorophosphate (DCP, the mimic of chemical warfare agent sarin) not only in solution but also in gas phase featuring instantaneous responses, excellent recyclability, high selectivity and sensitivity. Interestingly though the discriminated units of both chemosensors are terpyridine, their fluorescent responded signals are different, which is due to the different electron-donating substituents of T1 and T2 caused the different responded mechanism to DCP. And the possible sensing mechanism was proved by using nuclear magnetic resonance (H NMR, P NMR) spectra and natural transition orbitals calculations. Furthermore, facile testing filter paper-constructed strips with the visualization of colorimetric/fluorometric dual-channel responses based on T1 and T2 have been fabricated for real-time, on-site high selective and sensitive, recyclable monitor of DCP vapor.
在本文中，我们合成了两种基于三吡啶基团的供体（D）-受体（A）型小分子有机荧光分子（T1 和 T2），并将其用作比色/荧光双通道探针，不仅可以在溶液中，而且可以在气相中对二乙基氯膦（DCP，沙林化学战剂的模拟物）进行即时响应、优异的可回收性、高选择性和灵敏度的检测。有趣的是，尽管两种化学传感器的分辨单元都是三吡啶，但它们的荧光响应信号却不同，这是由于 T1 和 T2 的供电子取代基不同，导致对 DCP 的响应机制不同。并且通过使用核磁共振（H NMR、P NMR）谱和自然跃迁轨道计算证明了可能的传感机制。此外，我们还制备了基于 T1 和 T2 的简便测试滤纸构建条带，具有比色/荧光双通道响应的可视化功能，可实时、现场、高选择性和灵敏地、可重复使用地监测 DCP 蒸气。
