Sensitive Detection of a Nerve-Agent Simulant through Retightening Internanofiber Binding for Fluorescence Enhancement,Analytical Chemistry

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Sensitive Detection of a Nerve-Agent Simulant through Retightening Internanofiber Binding for Fluorescence Enhancement
Analytical Chemistry ( IF 6.7 ) Pub Date : 2018-01-16 00:00:00 , DOI: 10.1021/acs.analchem.7b04698
Xiaoling Liu _{1,

2} , Yanjun Gong _{1,

2} , Yingxuan Zheng _{1,

2} , Wei Xiong _{1,

2} , Chen Wang ₃ , Tie Wang _{1,

2} , Yanke Che _{1,

2} , Jincai Zhao _{1,

2}

Affiliation

In this work, we develop fluorescent hierarchical nanofiber bundles 1, which involve the internanofiber hydrogen-bonding interactions, for rapid and sensitive detection of diethyl chlorophosphate (DCP) vapor. First, the internanofiber hydrogen-bonding strength can be weakened by photoexcitation, which thereby increases the internanofiber spacing and decreases the fluorescence intensity. Then, when exposed to trace DCP vapor, the strong interactions between DCP and hydroxyl groups on the nanofibers can effectively retighten the nanofibers and enhance the fluorescence as the detection signal. In contrast, the interferences, such as common organic solvents, cannot retighten nanofiber bundles 1 because of the lack of strong interactions with the nanofibers. On the basis of this novel detection mechanism, fluorescence detection of DCP with rapid signal response (ca. 3 s) and high sensitivity (15 ppb) is achieved.

中文翻译：

通过加强神经纤维间结合来增强荧光的神经代理商模拟物的灵敏检测。

在这项工作中，我们开发了荧光分层纳米纤维束1，其中涉及纳米纤维之间的氢键相互作用，用于快速灵敏地检测二乙基氯磷酸（DCP）蒸气。首先，光激发会削弱纤维间的氢键结合强度，从而增加纤维间的间距并降低荧光强度。然后，当暴露于痕量DCP蒸气时，DCP与纳米纤维上的羟基之间的强相互作用可以有效地拉紧纳米纤维并增强荧光作为检测信号。相比之下，诸如普通有机溶剂之类的干扰物不能使纳米纤维束重新拉紧1因为缺乏与纳米纤维的强相互作用。在这种新颖的检测机制的基础上，实现了具有快速信号响应（约3 s）和高灵敏度（15 ppb）的DCP的荧光检测。

更新日期：2018-01-16

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