Near-Infrared-Light Mediated Ratiometric Luminescent Sensor for Multimode Visualized Assays of Explosives

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• 作者：Xiaoxia Hu ; Ting Wei ; Jie Wang ; Zi-En Liu ; Xinyang Li ; Binhao Zhang ; Zhihao Li ; Lele Li ; Quan Yuan
• 刊名：Analytical Chemistry
• 出版年：2014
• 出版时间：October 21, 2014
• 年：2014
• 卷：86
• 期：20
• 页码：10484-10491
• 全文大小：498K
• ISSN：1520-6882

文摘

The development of a portable and easy-to-use device for the detection of explosives with high sensitivity and selectivity is in high demand for homeland security and public safety. In this study, we demonstrate miniaturized devices depending on the upconversion ratiometric luminescent probe for point-of-care (POC) assay of explosives with the naked-eye. When the PEI-coated upconversion nanoparticles (UCNPs) selectively bonded to 2,4,6-trinitrotoluene (TNT) explosives by the formation of Meisenheimer complex, the formed of UCNP鈥揗eisenheimer complexes show turned visible multicolor upconversion luminescence (UCL) on account of TNT-modulating F枚rster resonance energy transfer process under near-infrared excitation. With UCL emission at 808 nm as internal standard and ratiometric UCL at 477 nm to that at 808 nm (I₄₇₇/I₈₀₈) as output signal, the probe can simultaneously meet the accuracy for TNT explosives quantitative analysis. In addition, this easy-to-use visual technique provides a powerful tool for convenient POC assay of rapid explosives identification.