Nitrogen doped graphene quantum dots based long-persistent chemiluminescence system for ascorbic acid imaging.
High photo-intensity and sluggish flight attenuation are important to highly sensitive chemluminescence imaging. Herein, we present a copper ion catalyzed long-persistent chemiluminescent imaging system of nitrogen-doped graphene quantum dots (NGQDs) for ascorbic acid detection in fruit. NGQDs as luminescent probe are fabricated, emitting out chemluminescence with the direct oxidation by H2O2. In addition, Cu2+ion enlarges over two order magnitudes of NGQDs CL intensity (214 times) due to its catalyzed Fenton-like reaction for H2O2decomposition, and displaying unique specificity against other metal ions. As a result, the twinkling luminescence of NGQDs is boosted and changes to hold persistent with small decay in the presence of copper ion exhibiting potential for CL imaging. As an imaging model, a visual sensor based on Cu2+/NGQDs/H2O2is developed for AA quantitative monitoring with a limit of detection (LOD) of 0.5μM (S/N=3) and applied in real AA detection in fruit. The CL imaging method demonstrated with high stability and proper sensitivity would provide a convenient and visual tool for AA determination, displaying promising candidates for imaging sensing.
State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China.
Hongjun
H
Chen
State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China.
Qin
Q
Wang
Key Laboratory of Tobacco Chemistry of Yunnan Province, China Tobacco Yunnan Industrial Co., Ltd, Kunming 650231, PR China.
Qinpeng
Q
Shen
Key Laboratory of Tobacco Chemistry of Yunnan Province, China Tobacco Yunnan Industrial Co., Ltd, Kunming 650231, PR China.
Xin
X
Liu
State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China. Electronic address: wli@hnu.edu.cn.
Wang
W
Li
State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China.
Zhou
Z
Nie
State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China.
Shouzhuo
S
Yao
D001205:Ascorbic Acid / Q000032:analysis*; D015374:Biosensing Techniques / Q000379:methods; D002413:Cations, Divalent / Q000737:chemistry; D003300:Copper / Q000737:chemistry; D005638:Fruit / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D057230:Limit of Detection; D049449:Luminescence; D049408:Luminescent Agents / Q000737:chemistry*; D027845:Malus / Q000737:chemistry; D009584:Nitrogen / Q000737:chemistry*; D061848:Optical Imaging / Q000379:methods*; D000068219:Prunus armeniaca / Q000737:chemistry; D031989:Pyrus / Q000737:chemistry; D045663:Quantum Dots / Q000737:chemistry* / Q000648:ultrastructure
D002413:Cations, Divalent; D049408:Luminescent Agents; D006108:Graphite; D003300:Copper; D006861:Hydrogen Peroxide; D009584:Nitrogen; D001205:Ascorbic Acid
Ascorbic acid imaging; Chemiluminescence; Copper ion; Nitrogen doped graphene quantum dots