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3D Spectral Fluorescence Signature of Cerium(III)-Melamine Coordination Polymer: a Novel Sensing Material for Explosive Detection
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy ( IF 4.3 ) Pub Date : 2020-09-12 , DOI: 10.1016/j.saa.2020.118941
Sherif Elbasuney , Ahmad Baraka , Mohamed Gobara , Yasser H. El-Sharkawy

Hidden or buried explosives are the most common scenario by terrorist attacks; therefore explosive vapour detection is a vital demand. Explosives are electron deficient materials; the vicinity of explosives to fluorescent material can encounter electron migration. This study reports on facile synthesis of cerium (III)-melamine coordination polymer (CeM-CP) with exclusive optical properties. CeM-CP demonstrated novel spectral fluorescence properties over visible and infrared bands when stimulated with UVA LED source at 385 nm of 100 mW power. Stimulated CeM-CP demonstrated unique spectral fluorescence signal at 400, 700, and 785 nm. These fluorescent signals were correlated to cerium coordination with four nitrogen atoms; vacant orbital will be available for electron excitation migration. Spectral fluorescent signals were quenched as CeM-CP was subjected to TNT vapours. Hyperspectral imaging offered 3D plot of fluorescence signature. The main outcome is that complete fluorescence signal attenuation was achieved at 785 nm. CeM-CP could act as as a novel sensing element for explosive vapour detection.



中文翻译:

铈(III)-三聚氰胺配位聚合物的3D光谱荧光特征:一种用于爆炸检测的新型传感材料

恐怖袭击最常见的情况是隐藏或掩埋炸药。因此,爆炸性蒸气检测是至关重要的。炸药是缺乏电子的材料;爆炸物附近的荧光物质会遇到电子迁移。这项研究报告了具有独有光学性质的铈(III)-三聚氰胺配位聚合物(CeM-CP)的简便合成。CeM-CP在385 nm的100 mW功率的UVA LED光源刺激下,在可见光和红外波段显示出新颖的光谱荧光特性。受刺激的CeM-CP在400、700和785 nm处显示出独特的光谱荧光信号。这些荧光信号与铈与四个氮原子的配位相关。空轨道将可用于电子激发迁移。当CeM-CP经受TNT蒸气时,光谱荧光信号被淬灭。高光谱成像提供了3D荧光标记图。主要结果是在785 nm处实现了完全的荧光信号衰减。CeM-CP可用作爆炸性蒸气检测的新型传感元件。

更新日期:2020-09-12
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