文献类型：期刊文献

英文题名：Fast and Ultrasensitive Detection of a Nerve Agent Simulant Using Carbazole-Based Nanofibers with Amplified Ratiometric Fluorescence Responses

作者：Sun, Chunyan[1];Xiong, Wei[2,3];Ye, Weidong[1];Zheng, Yingxuan[2,3];Duan, Ran[2];Che, Yanke[2,3];Zhao, Jincai[2,3]

机构：[1]Shaoxing Univ, Dept Chem, Shaoxing 312000, Zhejiang, Peoples R China;[2]Chinese Acad Sci, CAS Res Educ Ctr Excellence Mol Sci, Inst Chem, Key Lab Photochem, Beijing 100190, Peoples R China;[3]Univ Chinese Acad Sci, Beijing 100049, Peoples R China

年份：2018

卷号：90

期号：12

起止页码：7131

外文期刊名：ANALYTICAL CHEMISTRY

收录：SCI-EXPANDED(收录号：WOS:000436028800007)、、EI(收录号：20182205261588)、Scopus(收录号：2-s2.0-85047629810)、WOS

基金：This work was supported by the NSFC (Grants 21577147, 21590811, 21477080, and 21521062), the "Strategic Priority Research Program" of the CAS (Grant XDA09030200), and the "Key Research Program of Frontier Sciences" (No. QYZDY-SSW-SLH028) of the Chinese Academy of Sciences.

语种：英文

外文关键词：Charge transfer - Excitons - Nanofibers - Polycyclic aromatic hydrocarbons - Quenching

外文摘要：In this work, we report the fast and ultrasensitive detection of a nerve agent simulant in the gas phase, diethyl chlorophosphate (DCP), by using carbazole-based nanofibers from 1. When exposed to trace DCP, the formed pyridine-phosphorylated product in 1 nanofibers can cause amplified ratiometric fluorescence responses, i.e., amplified fluorescence quenching via quenching excitons within the diffusion length of 1 nanofibers and simultaneously amplified turn-on fluorescence responses via harvesting excitons within the diffusion length to give the intramolecular charge transfer (ICT) emission at a longer wavelength. On the basis of these amplified ratiometric fluorescence responses, detection of DCP with fast response (ca. 3 s), ultrasensitivity (4 ppb), and improved selectivity is achieved.