文献类型：期刊文献

英文题名：Reversible polymerization of carbon dots based on dynamic covalent imine bond

作者：Chen, Bin-Bin[1,2];Chang, Shuai[1];Jiang, Lei[1];Lv, Jian[1];Gao, Ya-Ting[1];Wang, Yue[1];Qian, Ruo-Can[1];Li, Da-Wei[1];Hafez, Mahmoud Elsayed[1,3]

机构：[1]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Sch Chem & Mol Engn, Key Lab Adv Mat,Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China;[2]Chinese Univ Hong Kong, Shenzhen Inst Aggregate Sci & Technol, Sch Sci & Engn, 2001 Longxiang Blvd, Shenzhen 518172, Guangdong, Peoples R China;[3]Beni Suef Univ, Fac Sci, Dept Chem, Bani Suwayf 62511, Egypt

年份：2022

卷号：621

起止页码：464

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;EI(收录号：20221812066730);WOS:【SCI-EXPANDED(收录号:WOS:000798828500007)】；

基金：The authors appreciate financial support from the National Natural Science Foundation of China (21788102, 21777041, 21974046, 22176058, and 21977031) , the Science and Technology Commission of Shanghai Municipality (19391901700, 19520744000, and 19ZR1472300) , and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Carbon dots; Dynamic covalent imine bond; Reversible polymerization; Reversible photoswitching; Information encryption

摘要：Carbon dots (CDs), as new type of carbon-based nanoparticles, are considered to be an aggregate with irreversible polymerization. Achieving the reversible tunability of CDs luminescence based on their reversible polymerization is a challenging subject. Herein, we, for the first time, design and construct the blueemitting CDs with reversible polymerization by a room-temperature Schiff base reaction between tannic acid and ethylenediamine. The formation of CDs is proven to be due to the crosslinking polymerization of precursors caused by imine bond. As a dynamic covalent bond, imine bond endows CDs with controllable structural transformation properties, and the prepared CDs can be depolymerized and polymerized reversibly by pH-controlled imine bond cleavage and re-formation. These properties of reversible fluorescence photoswitching make the CDs have a good application prospect in reversible information encryption.(c) 2022 Elsevier Inc. All rights reserved.