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Near-infrared emissive carbon dots with 33.96% emission in aqueous solution for cellular sensing and light-emitting diodes

查看全文 作　　者：Boyang [1]Wang;Jian [1]Li;Zhiyong [2,3]Tang;Bai [4]Yang;Siyu [1,2]Lu 高影响力作者 机构地区：[1]College of Chemistry, Zhengzhou University, Zhengzhou 450001, China;[2]Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou 450001, China;[3]CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China;[4]State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China高影响力机构 出　　处：《Science Bulletin》索引2019年第64卷第17期,共8页高影响力期刊 基　　金：financially supported by the China Postdoctoral Science Foundation (2018M640681, 2019T120632);the National Natural Science Foundation of China (21774041, 51433003);the National Key Research and Development Program of China (2016YFB0401701) 摘　　要：Near-infrared emissive carbon dots(CDs) were synthesized by hydrothermal method. The as-prepared CDs exhibited a relatively high quantum yield(QY) of 33.96% in an aqueous solution, and the peak toward the near-infrared fluorescence reached 685 nm. The CDs exhibited pH-sensitive characteristics under strong acidic conditions. Even at pH = 0, the as-prepared CDs retained a high fluorescence intensity,which proved that they possessed good acid resistance. More importantly, the CDs were sensitive to the Fe3+changes in living cells. In addition, they could also be used for white and red emissive LEDs.This discovery will expand the use of aqueous-phase high QY CDs in the field of living cell sensing and imaging. 关 键 词：Carbon DOTS Fluorescence Red EMISSION Aqueous CELLULAR SENSING
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