Fluorescence based explosive detection: from mechanisms to sensory materials

Abstract

The detection of explosives is one of the current pressing concerns in global security. In the past few decades, a large number of emissive sensing materials have been developed for the detection of explosives in vapor, solution, and solid states through fluorescence methods. In recent years, great efforts have been devoted to develop new fluorescent materials with various sensing mechanisms for detecting explosives in order to achieve super-sensitivity, ultra-selectivity, as well as fast response time. This review article starts with a brief introduction on various sensing mechanisms for fluorescence based explosive detection, and then summarizes in an exhaustive and systematic way the state-of-the-art of fluorescent materials for explosive detection with a focus on the research in the recent 5 years. A wide range of fluorescent materials, such as conjugated polymers, small fluorophores, supramolecular systems, bio-inspired materials and aggregation induced emission-active materials, and their sensing performance and sensing mechanism are the centerpiece of this review. Finally, conclusions and future outlook are presented and discussed.

Внедрение Сопряженного Полимера MDMO-PPV В Микрорезонаторы Из Пористого Кремния При Избыточном Давлении Из Раствора

“…Одними из перспективных в этой области являются оптические сенсоры на базе полимеров с сопряженными связями, в частности активно применяются различные растворимые производные полимера polyphenylene vinylene (PPV), такие как MEH−PPV, MDMO−PPV, BEHP−PPV и другие [1,2]. Работа подобных сенсоров основана на тушении люминесценции полимера в результате фотоиндуцированного переноса электрона с полимерной цепочки на молекулу взрывчатого вещества [3]. Было показано, что параметры таких сенсоров могут быть улучшены за счет их внедрения в микрорезонатор на основе пористого кремния [4].…”

“…Для внедрения использовался полимер MDMO-PPV, приобретенный в компании Sigma-Aldrich. Данный полимер, так же как и другие PPV-производные полимеры, чувствителен к нитроароматическим соедине-ниям [3].…”

Progress in the Molecular Design and Synthesis of Organic Fluorescent Probe for Picric Acid Detection

“…随着各种 PA 检测荧光探针的不断涌现, 相关综述 报道也很多, 它们分别从不同的侧面, 如检测机理 [3,5] 、 组成类型 [1,2,5～7] 、材料形态 [8,9] , 详细地总结了近年来的 研究进展. 从制备的角度出发, 纯有机分子型的荧光探 针具有原料来源广、设计多样化、便于修饰、形态可塑 性强等优点而备受关注 [2] , 特别是可以根据需要设计出 在不同环境中检测 PA 的荧光探针, 甚至在无外辅助荧 光增强的条件下均能达到较好的检测效果.…”

Reusable and Flexible Heterogeneous Catalyst for Reduction of TNT by Pd Nanocube Decorated ZnO Nanolayers onto Electrospun Polymeric Nanofibers

“…Recent efforts generally focus on the detection methods by sensors, chemical noses or electrochemically rather than its elimination. [1] However, an appropriate and sufficient exploration for the decontamination process is still a challenging pose. [1] Therefore, in this study, we focused on fast and effective catalytic reduction of TNT by palladium nanocube (Pd NC) decorated ZnO nanolayers on electrospun polymeric nanofibers.…”

“…[1] However, an appropriate and sufficient exploration for the decontamination process is still a challenging pose. [1] Therefore, in this study, we focused on fast and effective catalytic reduction of TNT by palladium nanocube (Pd NC) decorated ZnO nanolayers on electrospun polymeric nanofibers. For this purpose, an efficient nanocomposite architecture was designed by choosing a flexible and high surface area polymeric nanofibrous support.…”