Ultrafast-response, highly-sensitive and recyclable colorimetric/fluorometric dual-channel chemical warfare agent probes.
Ultrafast-response, highly-sensitive and recyclable colorimetric/fluorometric dual-channel chemical warfare agent probes.
复制标题
DOI：
10.1016/j.jhazmat.2021.125619
复制
发表时间：
2021-03
影响因子：
13.6
通讯作者：
Ping Zheng;Zhiyuan Cui;Haichao Liu;Wenjuan Cao;Feng Li;M. Zhang
中科院分区：
文献类型：
--
作者：
Ping Zheng;Zhiyuan Cui;Haichao Liu;Wenjuan Cao;Feng Li;M. Zhang
本文合成了两种基于三吡啶基团的供体(D)-受体(A)型有机荧光小分子（T1和T2），对其进行了表征，并将其作为比色/荧光双通道探针，不仅在溶液中，而且在气相中对二乙基氯磷酸（DCP，化学战剂沙林的模拟物）具有瞬时响应、优异的可回收性、高选择性和高灵敏度。有趣的是，虽然这两种化学传感器的识别单元都是三联吡啶，但它们的荧光响应信号却不同，这是由于T1和T2的给电子取代基不同导致它们对DCP的响应机制不同。并利用核磁共振（1H NMR,31P NMR）谱和自然跃迁轨道计算证明了可能的传感机理。此外，还制备了基于T1和T2的比色/荧光双通道响应可视化的简易测试滤纸条带，用于实时、现场高选择性、高灵敏度、可回收的DCP蒸汽监测。
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 (1H NMR,31P 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.