荧光
材料科学
黄嘌呤
X射线光电子能谱
核化学
荧光光谱法
二乙烯三胺
检出限
光化学
柠檬酸
量子产额
碳纤维
分析化学(期刊)
化学
色谱法
有机化学
核磁共振
物理
复合数
复合材料
酶
量子力学
作者
Yunsu Ma,Chuang Yao,Muhammad Sohail,Guanhong Xu,Fangdi Wei,Menglan Shi,Xiaoman Xu,Yueyue Song,Yujie Ma,Qin Hu
标识
DOI:10.1021/acsami.7b10548
摘要
In this work, a new kind of N, Cu codoped carbon dots (N/Cu-CDs) was prepared via a facile one-pot hydrothermal method by using citric acid monohydrate, copper acetate monohydrate and diethylenetriamine. The prepared N/Cu-CDs with a high quantum yield (50.1%) showed excitation-independent emission at 460 nm. The structure and fluorescence properties of N/Cu-CDs were characterized by high-resolution transmission electron microscopy, fluorescence spectrofluorometer, FT-IR spectrometer, UV-visible spectrophotometer and X-ray photoelectron spectroscopy. N/Cu-CDs were applied to establishing a ratiometric fluorescence probe toward H2O2 based on the inner filter effect (IFE) between N/Cu-CDs and DAP (2,3-diaminophenazine, the oxidative product of o-phenylenediamine (OPD)), and provided a ratiometric fluorescence universal platform for detection of the metabolites participating in H2O2-generation reactions (cholesterol and xanthine). The proposed method was demonstrated to be ultrasensitive and highly selective for cholesterol and xanthine assay with detection limits of 0.03 and 0.10 μM, respectively. The fluorescence probe built was applied to the determination of cholesterol and xanthine in human serum with satisfactory results.
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