化学
辣根过氧化物酶
NAD+激酶
辅因子
过氧化物酶
化学发光
醇脱氢酶
石墨烯
光化学
黄素组
葡萄糖氧化酶
氧化酶试验
催化作用
氧化物
纳米颗粒
生物传感器
组合化学
胶体金
氧化还原
过氧化氢
化学工程
电子转移
有机化学
酶
作者
Shan X. Wang,Rémi Cazelles,Wei Liao,Margarita Vázquez-González,Amani Zoabi,Raed Abu-Reziq,Itamar Willner
出处
期刊:Nano Letters
[American Chemical Society]
日期:2017-02-14
卷期号:17 (3): 2043-2048
被引量:168
标识
DOI:10.1021/acs.nanolett.7b00093
摘要
Cu2+-ion-modified graphene oxide nanoparticles, Cu2+-GO NPs, act as a heterogeneous catalyst mimicking functions of horseradish peroxidase, HRP, and of NADH peroxidase. The Cu2+-GO NPs catalyze the oxidation of dopamine to aminochrome by H2O2 and catalyze the generation of chemiluminescence in the presence of luminol and H2O2. The Cu2+-GO NPs provide an active material for the chemiluminescence detection of H2O2 and allow the probing of the activity of H2O2-generating oxidases and the detection of their substrates. This is exemplified with detecting glucose by the aerobic oxidation of glucose by glucose oxidase and the Cu2+-GO NP-stimulated chemiluminescence intensity generated by the H2O2 product. Similarly, the Cu2+-GO NPs catalyze the H2O2 oxidation of NADH to the biologically active NAD+ cofactor. This catalytic system allows its conjugation to biocatalytic transformations involving NAD+-dependent enzyme, as exemplified for the alcohol dehydrogenase-catalyzed oxidation of benzyl alcohol to benzoic acid through the Cu2+-GO NPs-catalyzed regeneration of NAD+.
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