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Tan W, Yao G, Yu H, He Y, Lu M, Zou T, Li X, Yin P, Na P, Yang W, Yang M, Wang H. Ultra-trace Ag doped carbon quantum dots with peroxidase-like activity for the colorimetric detection of glucose. Food Chem 2024; 447:139020. [PMID: 38513477 DOI: 10.1016/j.foodchem.2024.139020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 02/29/2024] [Accepted: 03/10/2024] [Indexed: 03/23/2024]
Abstract
Carbon quantum dots (CQDs) have significant applications in nanozymes. However, previous studies have not elucidated the structure-activity relationship and enzyme mechanism. In this study, we employed a one-step microwave method to synthesize ultra-trace Ag-doped carbon quantum dots (Ag-CQDs). In the presence of hydrogen peroxide (H2O2), we used the oxidative coupling reaction of 3,3',5,5'-tetramethylbenzidine (TMB) to evaluate the intrinsic peroxidase-like activity, kinetics, and mechanism of Ag-CQDs. The trace amount of doped Ag (1.64 %) facilitated electron transfer from the CQDs interior to the surface. The electron transfer triggered the peroxide activity of CQDs, producing hydroxyl radical (·OH), which oxidized the colorless TMB to blue-colored TMB (oxTMB). By coupling with glucose oxidase (GOx), the Ag-CQDs/H2O2/TMB system has been used for colorimetric glucose determination. The system demonstrated a low detection limit (0.17 µM), wide linear range (0.5-5.5 µM), and satisfactory results when fruit juice was analyzed. This study reports a feasible method for the colorimetric detection of glucose by synthesizing ultra-trace Ag-doped carbon quantum dots with peroxidase-mimicking activity.
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Affiliation(s)
- Wei Tan
- School of Chemistry and Environment, Yunnan Minzu University, Key Laboratory of Resource Clean Conversion in Ethnic Regions, Education Department of Yunnan, Key Laboratory of Environmental Functional Materials of Yunnan Province Education Department, Kunming 650500, PR China
| | - Guixiang Yao
- School of Chemistry and Environment, Yunnan Minzu University, Key Laboratory of Resource Clean Conversion in Ethnic Regions, Education Department of Yunnan, Key Laboratory of Environmental Functional Materials of Yunnan Province Education Department, Kunming 650500, PR China
| | - Hang Yu
- School of Chemistry and Environment, Yunnan Minzu University, Key Laboratory of Resource Clean Conversion in Ethnic Regions, Education Department of Yunnan, Key Laboratory of Environmental Functional Materials of Yunnan Province Education Department, Kunming 650500, PR China
| | - Yanzhi He
- School of Chemistry and Environment, Yunnan Minzu University, Key Laboratory of Resource Clean Conversion in Ethnic Regions, Education Department of Yunnan, Key Laboratory of Environmental Functional Materials of Yunnan Province Education Department, Kunming 650500, PR China
| | - Mingrong Lu
- School of Chemistry and Environment, Yunnan Minzu University, Key Laboratory of Resource Clean Conversion in Ethnic Regions, Education Department of Yunnan, Key Laboratory of Environmental Functional Materials of Yunnan Province Education Department, Kunming 650500, PR China
| | - Tianru Zou
- School of Chemistry and Environment, Yunnan Minzu University, Key Laboratory of Resource Clean Conversion in Ethnic Regions, Education Department of Yunnan, Key Laboratory of Environmental Functional Materials of Yunnan Province Education Department, Kunming 650500, PR China
| | - Xiaopei Li
- School of Chemistry and Environment, Yunnan Minzu University, Key Laboratory of Resource Clean Conversion in Ethnic Regions, Education Department of Yunnan, Key Laboratory of Environmental Functional Materials of Yunnan Province Education Department, Kunming 650500, PR China
| | - Pengyuan Yin
- School of Chemistry and Environment, Yunnan Minzu University, Key Laboratory of Resource Clean Conversion in Ethnic Regions, Education Department of Yunnan, Key Laboratory of Environmental Functional Materials of Yunnan Province Education Department, Kunming 650500, PR China
| | - Pei Na
- School of Chemistry and Environment, Yunnan Minzu University, Key Laboratory of Resource Clean Conversion in Ethnic Regions, Education Department of Yunnan, Key Laboratory of Environmental Functional Materials of Yunnan Province Education Department, Kunming 650500, PR China
| | - Wenrong Yang
- School of Life and Environmental Sciences, Deakin University, Waurn Ponds, Victoria 3216, Australia
| | - Min Yang
- School of Chemistry and Environment, Yunnan Minzu University, Key Laboratory of Resource Clean Conversion in Ethnic Regions, Education Department of Yunnan, Key Laboratory of Environmental Functional Materials of Yunnan Province Education Department, Kunming 650500, PR China.
| | - Hongbin Wang
- School of Chemistry and Environment, Yunnan Minzu University, Key Laboratory of Resource Clean Conversion in Ethnic Regions, Education Department of Yunnan, Key Laboratory of Environmental Functional Materials of Yunnan Province Education Department, Kunming 650500, PR China.
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Ouassou M, Mukhaimar M, El Amrani A, Kroymann J, Chauveau O. [Biosynthesis of indole glucosinolates and ecological role of secondary modification pathways]. C R Biol 2019; 342:58-80. [PMID: 31088733 DOI: 10.1016/j.crvi.2019.03.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 03/22/2019] [Accepted: 03/23/2019] [Indexed: 11/26/2022]
Abstract
Indole glucosinolates are plant secondary metabolites derived from the amino acid tryptophan. They are part of a large group of sulfur-containing molecules almost exclusively found among Brassicales, which include the mustard family (Brassicaceae) with many edible plant species of major nutritional importance. These compounds mediate numerous interactions between these plants and their natural enemies and are therefore of major biological and economical interest. This literature review aims at taking stock of recent advances of our knowledge about the biosynthetic pathways of indole glucosinolates, but also about the defense strategies and ecological processes involving these metabolites.
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Affiliation(s)
- Malika Ouassou
- Unité « Écologie, systématique et évolution », UMR 8079, université Paris-Sud, CNRS, AgroParisTech, université Paris-Saclay, 91405 Orsay, France; Laboratory of Biochemistry and Molecular Genetics, Department of Biology, Faculty of Science and Technics, Abdelmalek Essaadi University, Tangier, Maroc
| | - Maisara Mukhaimar
- National Agricultural Research Center (NARC)-Jenin/Gaza, Ministry of Agriculture, Jenin, Palestine
| | - Amal El Amrani
- Laboratory of Biochemistry and Molecular Genetics, Department of Biology, Faculty of Science and Technics, Abdelmalek Essaadi University, Tangier, Maroc
| | - Juergen Kroymann
- Unité « Écologie, systématique et évolution », UMR 8079, université Paris-Sud, CNRS, AgroParisTech, université Paris-Saclay, 91405 Orsay, France
| | - Olivier Chauveau
- Unité « Écologie, systématique et évolution », UMR 8079, université Paris-Sud, CNRS, AgroParisTech, université Paris-Saclay, 91405 Orsay, France.
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