Sichuan Co-Innovation Center for New Energetic Materials, School of National Defense Science & Technology, Southwest University of Science and Technology, Mianyang, 621010, People's Republic of China.
Xinjiang Key Laboratory of Explosives Safety Science, Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi, 830011, China.
Anal Sci. 2023 Jun;39(6):935-943. doi: 10.1007/s44211-023-00298-5. Epub 2023 Feb 27.
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 I 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.
在三过氧化三丙酮（TATP）爆炸物的比色检测中，长期存在的挑战是灵敏度低。我们在此开发了一种碘介导的光诱导自动感应串联显色系统，以实现指数信号放大。该策略利用 KI-TATP 反应和邻苯二胺（OPD）的光诱导自催化氧化作用串联工作。由 KI-TATP 反应产生的 I 将 OPD 氧化为黄色 2,3-二氨基吩嗪（DAP），然后在蓝光照射下进一步被激发产生活性氧物种（ROS）。所得 ROS 反过来促进 OPD 的氧化以获得更多的 DAP，从而引发自动感应显色反应过程。该串联显色系统用于 TATP 的可视化比色检测，允许选择性和灵敏地检测 TATP，最低检测限低至 42.8 μM。此外，还对实际样品中的 TATP 进行了分析，得到了令人满意的回收结果。此外，还开发了现场检测试剂盒。
