文献类型：期刊文献

英文题名：Facile and cost-effective preparation of carbon quantum dots for Fe3+ ion and ascorbic acid detection in living cells based on the "on-off-on" fluorescence principle

作者：Gao, Xuexia[1] Zhou, Xi[1,2] Ma, Yufeng[3] Qian, Tao[4] Wang, Chunpeng[1,2] Chu, Fuxiang[1,2]

第一作者：Gao, Xuexia

通信作者：Zhou, X[1];Chu, FX[1]|[a0005adfced0a4ac3a671]周希;

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forestry Prod, Key Lab Biomass Energy & Mat Jiangsu Prov,Natl En, Key & Open Lab Forest Chem Engn,State Forestry Ad, Nanjing 210042, Jiangsu, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry New Technol, Beijing 100091, Peoples R China;[3]Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing 210037, Jiangsu, Peoples R China;[4]Soochow Univ, Coll Energy, Soochow Inst Energy & Mat Innovat, Suzhou 215006, Peoples R China

年份：2019

卷号：469

起止页码：911-916

外文期刊名：APPLIED SURFACE SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000454617200105)】；

基金：This work was supported by Fundamental Research Funds of Research Institute of Forest New Technology, CAF (CAFYBB2017SY033).

语种：英文

外文关键词：Lignin; Fluorescence turn off/on; Real samples; Cellular imaging

摘要：A facile and cost-effective route of fabricating carbon quantum dots (CQDs) was proposed via simply hydrothermal treatment of lignin. Because of abundant aromatic structure and functional groups derived from lignin, the prepared CQDs (LCQDs) showed unique chemical and optical property. A remarkable fluorescence quenching effect of Fe3+ on LCQDs was found, resulting from the formation of non-fluorescence complex between LCQDs and Fe3+. This "on-off" fluorescence CQDs nanoprobe for Fe3+ allowed a wide linear range of 50-650 mu M with the limit of detection (LOD) as low as 196 nM. Besides, ascorbic acid (AA) was found to reduce Fe3+ to Fe2+, leading to the recovery of the LCQDs fluorescence and a good linearity in range of 0-350 mu M with a LOD of 5.34 mu M. Furthermore, this sensing platform was successfully used for Fe3+ and AA monitoring in biological samples and intracellular imaging without surface modification.