Strategy to Synthesize Tunable Multiemission Carbon Dots and Their Multicolor Visualization Application

作者全名："Zhu, Panpan; Li, Jiayu; Gao, Lixia; Xiong, Jie; Tan, Kejun"

作者地址："[Zhu, Panpan; Gao, Lixia; Xiong, Jie; Tan, Kejun] Southwest Univ, Key Lab Luminescence Anal & Mol Sensing, Coll Chem & Chem Engn, Minist Educ, Chongqing 400715, Peoples R China; [Li, Jiayu] Chongqing Med Univ, Chongqing Key Lab Translat Med Major Metab Dis, Affiliated Hosp 1, Chongqing 400016, Peoples R China"

通信作者："Tan, KJ (corresponding author), Southwest Univ, Key Lab Luminescence Anal & Mol Sensing, Coll Chem & Chem Engn, Minist Educ, Chongqing 400715, Peoples R China."

来源：ACS APPLIED MATERIALS & INTERFACES

ESI学科分类：MATERIALS SCIENCE

WOS号：WOS:000677540900073

JCR分区：Q1

影响因子：9.5

年份：2021

卷号：13

期号：28

开始页：33354

结束页：33362

文献类型：Article

关键词：carbon dots; multiemissions; luminescence origin; multicolor fluorescent sensing; visualization; pH detection

摘要："Studies on multiemission fluorescent carbon dots (CDs) excited at one wavelength are extremely promising because of their label-free property, facile synthesis, multicolor visualization, and prevention of background interference. In this study, a novel template strategy to develop multiemission carbon dots (M-CDs) using fluorescent precursors has emerged. We attempted to elucidate the relationship between precursor substances and luminescence origins. The M-CDs prepared by calcein demonstrate three emissions, ultraviolet (UV), blue, and green, which are attributed to the solvent, surface defect, and precursor aromatic ring luminophores, respectively. Also, through a regular adjustment of the amount of NaOH or the solvothermal synthesis time, the expected optical requirements were successfully met by the M-CDs, which is a better capability than that of previously reported M-CDs. In addition, a multicolor sensor designed with M-CDs and rhodamine B (RhB) has been successfully applied in cell imaging. When exposed to different pH media, the fluorescence (FL) emission shows a linear relationship with the pH value, displaying a profuse color evolution from dark blue to light blue, cyan, green, yellow, and finally, orange."

基金机构：National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC) [21377103]; Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities [XDJK2019TY003]

基金资助正文："The authors gratefully acknowledge the support from the National Natural Science Foundation of China (NSFC, Grant No. 21377103) and the Fundamental Research Funds for the Central Universities (XDJK2019TY003)."