Chemodosimeter for Selective and Sensitive Chromogenic and Fluorogenic Detection of Mustard Gas for Real Time Analysis
作者:Vinod Kumar、Hemlata Rana、G. Raviraju、Arvind K. Gupta
DOI:10.1021/acs.analchem.7b04882
日期:2018.1.16
Since the first use of chemical warfare agents (CWA) (1915) to the recent attacks in Syria (2017) on mankind, there have been many incidents where CWA have claimed thousands of lives and left many more contaminated. In order to provide the appropriate and immediate medical counter measure to the victims, the exact classification of these chemical agents within few minutes on the field itself using a rapid and simple detection technique is extremely important to save the lives of the effected people. This has motivated all of us to explore the novel strategies/detection systems that can be field deployable with better selectivity and greater sensitivity. In view of this, we present a novel chemosensor, 3,6-bis(dimethylamino)-9(10H)-acridine thione (1), that can detect mustard gas and its simulant by both chromogenic and fluorogenic methods. For the first time, a single probe was able to demonstrate the detection with unprecedented selectivity over most probable interferences (nerve agents and alkylating agents) including solvents, acids, and bases which are routinely present in the environment. The desired level of sensitivity by naked eyes (0.04 mg/mL), UV spectroscopy (0.02 mg/mL), and fluorescence spectroscopy (0.005 mg/mL) makes this method truly field deployable. For the spot detection on the affected areas, a handy and potable chemosensor kit was also fabricated. This paper provides a simple, highly specific, and easy to use method in “actual sense” that not only detects the agents in the solution phase but also in the contaminated samples.
自1915年首次使用化学战剂(CWA)到2017年针对人类的叙利亚最近袭击以来,CWA已经造成了许多事件,夺去了数千人的生命,并使更多的人受到污染。为了向受害者提供适当的即时医疗对策,在现场几分钟内使用快速简便的检测技术对这些化学剂进行精确分类对于拯救受影响的人们生命至关重要。这激励我们所有人探索新颖的策略/检测系统,这些系统可以在现场部署时具有更好的选择性和更高的灵敏度。鉴于此,我们提出了一种新型化学传感器,3,6-双(二甲基氨基)-9(10H)-吖啶硫酮(1),可以利用色原性和荧光性方法检测芥子气及其模拟物。首次,单个探针能够在包括环境中有规律存在的溶剂、酸和碱在内的最可能干扰物(神经剂和烷化剂)中展现前所未有的选择性检测。通过裸眼(0.04 mg/mL)、UV光谱(0.02 mg/mL)和荧光光谱(0.005 mg/mL)能够实现所需水平的灵敏度,从而真正实现现场部署。为了在受影响区域进行点检测,还制备了一种便携式的化学传感器工具箱。本文提供了一种简单、高度特定且易于使用的方法,不仅可以检测溶液相中的化学剂,还可以检测受污染样品中的化学剂。