Dual-property blue and red emission carbon dots for Fe(Ⅲ)ions detection and cellular imaging

• 作者: Yin-Long Xu Rui-Xue Mo Cai-Yu Qi Zeng Ren Xiu-Zhi Jia Zi-Gui Kan Cao-Long Li Fei Wang
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（7）
• 所属期刊栏目: ORIGINAL ARTICLES
• 页码范围: 1957-1965
• 页数: 9页
• 语种: 英文

摘要

The excitation wavelength-dependent and-in-dependent emissions are two crucial fluorescent properties of carbon dots(CDs).However,CDs reported till date exhibit only one of these properties,which limits their practical applications.Herein,dual-property carbon dots(DCDs)with both the excitation wavelength-dependent and-independent emissions were synthesized via a facile one-step solvothermal method using 4-(2-pyridylazo)-resorci-nol as the carbon precursor.The multi-functional applica-tions of the resulting DCDs were also evaluated.The as-prepared DCDs exhibited not only excellent monodisper-sity,high photostability,and storage stability,but also low toxicity,good biocompatibility,and cellular bioimaging capability.In addition,the DCDs exhibited excitation-de-pendent emission photoluminescence under low excitation wavelengths.The DCDs exhibited good Fe3+detection by quenching the blue emission fluorescence and showed a relatively low Fe3+detection limit of 0.067 μmol·L-1 based on three times signal-to-noise criteria(R2=0.99).Furthermore,the DCDs showed excitation-independent emission at low excitation wavelengths and exhibited red emission at about 598 nm to avoid damage to the body.These results demonstrate the excellent bioimaging prop-erties of the DCDs.Owing to their dual PL properties,the as-prepared DCDs exhibited multi-functional applications:Fe3+detection and A549 cell bioimaging.These results will be helpful in developing novel CDs for applications in various fields.