文献类型：期刊文献

英文题名：One-step solvothermal synthesis of high-emissive amphiphilic carbon dots via rigidity derivation

作者：Zhao, Pei[1];Li, Xuping[1];Baryshnikov, Glib[2,4];Wu, Bin[1];Agren, Hans[2,5];Zhang, Junji[3];Zhu, Liangliang[1]

机构：[1]Fudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, Shanghai 200433, Peoples R China;[2]KTH Royal Inst Technol, Biol Sch Biotechnol, Div Theoret Chem, SE-10691 Stockholm, Sweden;[3]East China Univ Sci & Technol, Inst Fine Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[4]Bogdan Khmelnitsky Natl Univ, Dept Chem & Nanomat Sci, UA-18031 Cherkassy, Ukraine;[5]Siberian Fed Univ, Inst Nanotechnol Spect & Quantum Chem, Krasnoyarsk 660041, Russia

年份：2018

卷号：9

期号：5

起止页码：1323

外文期刊名：CHEMICAL SCIENCE

收录：;EI(收录号：20180604761780);WOS:【SCI-EXPANDED(收录号:WOS:000424010600027)】；

基金：This work was supported by the NSFC (21644005 and 21628401) and the National Program for Thousand Young Talents of China. H. A. and G. B. acknowledge the Carl Tryggers foundation (Grant No. CTS 16:536). G. B. also acknowledges the Ministry of Education and Science of Ukraine (project numbers 0115U003637 and 0117U001979).

语种：英文

外文关键词：Carbon - Crystallinity - Bioimaging - Metal ions - Metals - Biocompatibility

摘要：In nanoscience, amphiphilic carbon dots (ACDs) are of great importance due to their excellent transferability for application in biological sensing, imaging and labelling. However, facile synthetic strategies are still limited, especially for obtaining high-emissive ACDs. Since the development of a high-emissive feature is strongly desired for improving the practical resolution in vivo, here we report a chemical strategy that uses rigid molecules to straightforwardly construct amphiphilic carbon dots (ACDs) with high luminescence quantum yields (QYs). By using 1-[bis(dimethylamino)methylene]-1H-1,2,3-triazolo[4,5-b]pyridinium 3-oxide hexafluorophosphate (HATU), a typical coplanar compound, as the only precursor, well-defined ACDs were prepared via a one-step solvothermal process which exhibited a superior QY of up to 29%, largely superior to those prepared from precursors with less rigid structures. The effect can be mainly attributed to a significant suppression of the competition of non-radiative decay through rigidity derivation. Metal ionic doping during the synthesis resulted in a further improvement of the crystallinity and monodispersity of the materials, with retention of the high-emissive ability. This high-emissive photoluminescence behavior of the ACDs is accompanied with an excitation-wavelength dependence, a high biocompatibility and a low toxicity, which together make the ACDs advantageous for application in multi-channel bioimaging.