文献类型：期刊文献

英文题名：Ultra-Sensitive Detection of Dmso Using Carbon Dots with Hydrogen Bond-Controlled Aggregation Behavior

作者：Chang, Shuai[1]; Chen, Bin-Bin[1,2]; Gao, Ya-Ting[1]; Zheng, Yi-Han[1]; Shi, Ji-Fen[1]; Qian, Ruo-Can[1]; Li, Da-Wei[1]

机构：[1] Key Laboratory for Advanced Materials, Shanghai Key Laboratory of Functional Materials Chemistry, Frontiers Science Center for Materiobiology & Dynamic Chemistry, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] School of Science and Engineering, Shenzhen Institute of Aggregate Science and Technology, The Chinese University of Hong Kong, Shenzhen, 2001 Longxiang Boulevard, Longgang District, Guangdong, Shenzhen, 518172, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220336831)

语种：英文

外文关键词：Hydrogen bonds - Molecules - Organic solvents - Probes - Water quality

摘要：Hydrogen bonding effect is vital in regulating the dispersion and fluorescence (FL) properties of carbon dots (CDs), but rarely disclosed. Herein, hydrophilic CDs (H-CDs) are prepared by a facile room temperature method. Due to the formation of strong hydrogen bonds between H-CDs and water molecules, H-CDs can maintain excellent stability in aqueous solution. However, the addition of protic solvents with weak hydrogen bonding (such as ethanol) can induce the continuous aggregation H-CDs, accompanied by FL quenching. Unlike protic solvents, aprotic solvents can cause the aggregation of H-CDs in an extremely sensitive degree by destroying the hydrated layer of H-CDs, while the aggregated H-CDs will be re-dispersed again as the volume increase of aprotic solvent, leading to a "on-off-on" FL phenomenon. Because of the ultrasensitive response to aprotic solvent, H-CDs can serve as the optical probe for detecting trace dimethyl sulfoxide (DMSO) in aqueous solution with a linear range of 0.005% to 0.75% and a detection limit of 0.001%. This research not only achieves the controllable regulation of CDs aggregation behavior by altering the strength of hydrogen bonding, but also develops an ultrasensitive DMSO probe for water quality safety monitoring. ? 2022, The Authors. All rights reserved.