显色的
化学
串联
化学发光
碘
光化学
色谱法
分析化学(期刊)
有机化学
复合材料
材料科学
作者
Jingyu Wang,Yunyi Cui,Ying Lin,Yi He
出处
期刊:Analytical Sciences
[Japan Society for Analytical Chemistry]
日期:2023-02-27
卷期号:39 (6): 935-943
标识
DOI:10.1007/s44211-023-00298-5
摘要
A long-standing challenge in colorimetric detection of triacetone triperoxide (TATP) explosive is low sensitivity. We herein developed an iodine-mediated photoinduced auto-inductive tandem chromogenic system to achieve exponential signal amplification. The strategy employs the KI-TATP reaction and photo-induced autocatalytical oxidation of o-phenylenediamine (OPD) that work in tandem. The resulting I3- from the KI-TATP reaction oxidizes OPD to yellow 2,3-diaminophenazine (DAP) that is further excited by blue light illumination to produce reactive oxygen species (ROS). The obtained ROS, in turn, promotes the oxidation of OPD to gain more DAP, causing the auto-inductive chromogenic reaction processes. This tandem chromogenic system is applied for visual colorimetric detection of TATP, allowing the selective and sensitive detection of TATP down to 42.8 μM. Moreover, analyses of TATP in real samples are performed, and the satisfactory recovery results are achieved. Furthermore, a field detection kit is also developed.
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