Carbon dots as light-responsive oxidase-like nanozyme for colorimetric detection of total antioxidant capacity in fruits.

Autor: Li J; Henan Joint International Research Laboratory of Green Construction of Functional Molecules and their Bioanalytical Applications, Zhengzhou Key Laboratory of Functional Nanomaterial and Medical Theranostic, Zhengzhou University, Zhengzhou, China; College of Chemistry, Institute of Analytical Chemistry for Life Science, Zhengzhou University, Zhengzhou, China., Zhou Y; Henan Joint International Research Laboratory of Green Construction of Functional Molecules and their Bioanalytical Applications, Zhengzhou Key Laboratory of Functional Nanomaterial and Medical Theranostic, Zhengzhou University, Zhengzhou, China; College of Chemistry, Institute of Analytical Chemistry for Life Science, Zhengzhou University, Zhengzhou, China., Xiao Y; Henan Joint International Research Laboratory of Green Construction of Functional Molecules and their Bioanalytical Applications, Zhengzhou Key Laboratory of Functional Nanomaterial and Medical Theranostic, Zhengzhou University, Zhengzhou, China; College of Chemistry, Institute of Analytical Chemistry for Life Science, Zhengzhou University, Zhengzhou, China., Cai S; Henan Joint International Research Laboratory of Green Construction of Functional Molecules and their Bioanalytical Applications, Zhengzhou Key Laboratory of Functional Nanomaterial and Medical Theranostic, Zhengzhou University, Zhengzhou, China; College of Chemistry, Institute of Analytical Chemistry for Life Science, Zhengzhou University, Zhengzhou, China., Huang C; Henan Joint International Research Laboratory of Green Construction of Functional Molecules and their Bioanalytical Applications, Zhengzhou Key Laboratory of Functional Nanomaterial and Medical Theranostic, Zhengzhou University, Zhengzhou, China; College of Chemistry, Institute of Analytical Chemistry for Life Science, Zhengzhou University, Zhengzhou, China., Guo S; Henan Joint International Research Laboratory of Green Construction of Functional Molecules and their Bioanalytical Applications, Zhengzhou Key Laboratory of Functional Nanomaterial and Medical Theranostic, Zhengzhou University, Zhengzhou, China; College of Chemistry, Institute of Analytical Chemistry for Life Science, Zhengzhou University, Zhengzhou, China., Sun Y; Henan Joint International Research Laboratory of Green Construction of Functional Molecules and their Bioanalytical Applications, Zhengzhou Key Laboratory of Functional Nanomaterial and Medical Theranostic, Zhengzhou University, Zhengzhou, China; College of Chemistry, Institute of Analytical Chemistry for Life Science, Zhengzhou University, Zhengzhou, China. Electronic address: sunyq@zzu.edu.cn., Song RB; Henan Joint International Research Laboratory of Green Construction of Functional Molecules and their Bioanalytical Applications, Zhengzhou Key Laboratory of Functional Nanomaterial and Medical Theranostic, Zhengzhou University, Zhengzhou, China; School of Ecology and Environment, Zhengzhou University, Zhengzhou, China. Electronic address: rbsong@zzu.edu.cn., Li Z; Henan Joint International Research Laboratory of Green Construction of Functional Molecules and their Bioanalytical Applications, Zhengzhou Key Laboratory of Functional Nanomaterial and Medical Theranostic, Zhengzhou University, Zhengzhou, China; College of Chemistry, Institute of Analytical Chemistry for Life Science, Zhengzhou University, Zhengzhou, China.
Jazyk: angličtina
Zdroj: Food chemistry [Food Chem] 2023 Mar 30; Vol. 405 (Pt A), pp. 134749. Date of Electronic Publication: 2022 Oct 29.
DOI: 10.1016/j.foodchem.2022.134749
Abstrakt: Evaluation of total antioxidant capacity (TAC) in fruits is essential for dietary guidance and health monitoring. Here, we have exploited light-response carbon dots (CDs) as oxidase-like nanozyme to determine the TAC of fruits. The CDs possess excellent oxidase-like activity with light stimulation due to the accelerated intramolecular charge transfer caused by abundant electron donating/drawing groups in precursors. The scavenger experiment reveals that the catalytic intermediate could be hydroxyl radical, which can oxidize the colorimetric substrate. With the introduction of antioxidants, the oxidization of colorimetric substrate will be alleviated due to the scavenging of this intermediate by antioxidants. Based on this, we have successfully detected three antioxidants and obtained TAC of fruits with desirable results. This work affords a rapid, cost-effective and convenient analysis tool for TAC, as well as building a strong bridge between CDs and the development of photo-responsive oxidase-like nanozymes.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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