A novel colorimetric assay based on the peroxidase-like properties of amino functionalized copper metal-organic framework nanoparticles for ascorbic acid sensing

被引:27
作者
Yao, Zhixia [1 ,2 ]
Li, Zhen [1 ,3 ]
Liu, Hanmeng [1 ,2 ]
Liu, Yaosheng [1 ,2 ]
Sun, Yujing [1 ,2 ,3 ]
Li, Zhuang [1 ,2 ,3 ]
机构
[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Peoples R China
[2] Univ Sci & Technol China, Hefei 230026, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
基金
中国国家自然科学基金;
关键词
GRAPHENE OXIDE; CATALYTIC-ACTIVITY; NANOMATERIALS; NANOCLUSTERS; QUALITY; GROWTH;
D O I
10.1039/c9ay00172g
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A rapid and sensitive calorimetric strategy for the determination of ascorbic acid (AA) is presented, using amino functionalized copper metal-organic framework nanoparticles (Cu-BDC-NH(2)NPs) with effective intrinsic peroxidase-like properties. In our design, Cu-BDC-NH(2)NPs catalyze the H2O2 oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) generating blue-colored oxidized TMB (ox-TMB) with a significant absorbance at 655 nm in the UV-vis spectrum. AA can reduce ox-TMB, inducing a dramatic blue color fading and a decrease in absorbance. Under the optimal experimental conditions, this proposed system presents a good linear relationship (0.5-60 mu M) and the detection limit is 0.15 mu M. Repeatability, high selectivity and practicability are also well-studied, proving that the sensing system based on Cu-BDC-NH(2)NPs can be successfully applied for calorimetric detection of AA in human serum, food and pharmaceutical samples. The designed method can provide a highly selective and sensitive optical sensing system to detect AA and establish a new platform to develop extensive applications of metal- organic framework nanoparticles with enzyme-mimetic activity in calorimetric biosensing.
引用
收藏
页码:1697 / 1706
页数:10
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