Ultrasensitive and On‐Site Detection of Nitroaromatic Explosives Through a Dual‐Mode Hydrogel Sensor Utilizing Portable Devices

Author:

Zhang Jiawei12ORCID,Xiong Jingyi12,Gao Bowen2,Zheng Xufan3,Hu Tianyu1,Li Dexin3,Li Yuda2,Wu Jingnan1,Wang Xunchang13,Yang Renqiang3ORCID

Affiliation:

1. State Key Laboratory of Fine Blasting Jianghan University Wuhan 430056 China

2. Key Laboratory of Novel Biomass‐based Environmental and Energy Materials in Petroleum and Chemical Industry Key Laboratory for Green Process of Ministry of Education School of Chemical Engineering and Pharmacy Wuhan Institute of Technology Wuhan 430205 China

3. Key Laboratory of Optoelectronic Chemical Materials and Devices (Ministry of Education) School of Optoelectronic Materials & Technology Jianghan University Wuhan 430056 China

Abstract

AbstractThe development of straightforward and dependable explosive sensors for on‐site identification is essential to preserving public safety concerns and lowering the safety risks related to explosions. However, one of the main barriers to the advancement of on‐site explosives detection in the future is the complexity of detection process. Here, a flexible hydrogel‐based sensing platform based on 3,4‐bis (4‐(1,2,2‐triphenylvinyl) phenyl) thiophene (TPE‐Z) and a methyl red design concept is shown that simultaneously achieves all targeted properties, including being quick, portable, reliable, and resistant to external interference. This composite fluorescent probe demonstrates outstanding detection capabilities, including low detection limits (0.48 mg L−1) and rapid response times (<5 s), which can be combined with smartphones for on‐site 2,4,6‐trinitrophenol (picric acid, PA) detection. Two independent fluorescence and colorimetric channels on the sensor showed selective response to PA under fluorescence and visible light irradiation, respectively. Meanwhile, the hydrogel sensor's distinct “turn on” and “turn off” response modes to PA can be utilized to construct “YES” and “NO” logic gates, which subsequently proves that they can be employed to differentiate PA on‐site. This sensing platform based on hydrogel is envisaged to offer in‐depth insights in advancing the on‐site detection of nitroaromatic explosives.

Funder

National Natural Science Foundation of China

Jianghan University

State Key Laboratory of Precision Spectroscopy

Natural Science Foundation of Hubei Province

Publisher

Wiley

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