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Xu Y, Ma Y, Chen X, Wu K, Wang K, Shen Y, Liu S, Gao XJ, Zhang Y. Regulating Reactive Oxygen Intermediates of Fe-N-C SAzyme via Second-Shell Coordination for Selective Aerobic Oxidation Reactions. Angew Chem Int Ed Engl 2024; 63:e202408935. [PMID: 38895986 DOI: 10.1002/anie.202408935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2024] [Revised: 06/05/2024] [Accepted: 06/19/2024] [Indexed: 06/21/2024]
Abstract
Reactive oxygen species (ROS) regulation for single-atom nanozymes (SAzymes), e.g., Fe-N-C, is a key scientific issue that determines the activity, selectivity, and stability of aerobic reaction. However, the poor understanding of ROS formation mechanism on SAzymes greatly hampers their wider deployment. Herein, inspired by cytochromes P450 affording bound ROS intermediates in O2 activation, we report Fe-N-C containing the same FeN4 but with tunable second-shell coordination can effectively regulate ROS production pathways. Remarkably, compared to the control Fe-N-C sample, the second-shell sulfur functionalized Fe-N-C delivered a 2.4-fold increase of oxidase-like activity via the bound Fe=O intermediate. Conversely, free ROS (⋅O2 -) release was significantly reduced after functionalization, down to only 17 % of that observed for Fe-N-C. The detailed characterizations and theoretical calculations revealed that the second-shell sulfur functionalization significantly altered the electronic structure of FeN4 sites, leading to an increase of electron density at Fermi level. It enhanced the electron transfer from active sites to the key intermediate *OOH, thereby ultimately determining the type of ROS in aerobic oxidation process. The proposed Fe-N-Cs with different second-shell anion were further applied to three aerobic oxidation reactions with enhanced activity, selectivity, and stability.
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Affiliation(s)
- Yuan Xu
- School of Chemistry and Chemical Engineering, Medical School, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio Medical Research, Southeast University, Nanjing, 211189, China
| | - Yuanjie Ma
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, China
| | - Xinghua Chen
- School of Chemistry and Chemical Engineering, Medical School, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio Medical Research, Southeast University, Nanjing, 211189, China
| | - Kaiqing Wu
- School of Chemistry and Chemical Engineering, Medical School, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio Medical Research, Southeast University, Nanjing, 211189, China
| | - Kaiyuan Wang
- School of Chemistry and Chemical Engineering, Medical School, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio Medical Research, Southeast University, Nanjing, 211189, China
| | - Yanfei Shen
- School of Chemistry and Chemical Engineering, Medical School, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio Medical Research, Southeast University, Nanjing, 211189, China
| | - Songqin Liu
- School of Chemistry and Chemical Engineering, Medical School, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio Medical Research, Southeast University, Nanjing, 211189, China
| | - Xuejiao J Gao
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, China
| | - Yuanjian Zhang
- School of Chemistry and Chemical Engineering, Medical School, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio Medical Research, Southeast University, Nanjing, 211189, China
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Shome A, Ali S, Haydar MS, Sarkar K, Roy S, Adhikary P, Roy MN. Synthesis of Spherical Mn 2O 3 Nanozymes from Different Green Precursors for their Innovative Applications in Catalytic Properties and Bioactivity. ACS Biomater Sci Eng 2024; 10:1734-1742. [PMID: 38330433 DOI: 10.1021/acsbiomaterials.3c00608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
Here, spherical Mn2O3 nanozymes were synthesized via a one-step green method using different green precursors, and their physicochemical properties and biological activities were monitored with various green precursors. Powder X-ray diffraction (PXRD) was performed to determine the crystalline properties and phases involved in the formation of cubic Mn2O3 nanozymes. The synthesized nanozymes were spherical and examined by SEM and FESEM studies. All of the samples synthesized using different green precursors exhibited different sizes but similar spherical shapes. Moreover, all green-synthesized nanozymes catalyzed the oxidation reaction of the chromogenic substrate 3,3'5,5' tetramethylbenzidine (TMB) in the absence of H2O2, and A2 (lemon-mediated Mn2O3 nanozymes), which the followed Michaelis-Menten kinetics, showed the best activity. Therefore, A2 (lemon-mediated nanozyme) showed oxidase-mimicking activity with distinct Km and Vmax values calculated by the Lineweaver-Burk plot. Furthermore, the current nanozymes demonstrated a significant ability to kill both Gram-negative and Gram-positive bacteria as well as effectively destroy biofilms under physiological conditions. Moreover, the green-mediated nanozymes also displayed ROS-scavenging activity. Our nanozymes exhibited scavenging activity toward OH and O2-• radicals and metal chelation activity, which were investigated colorimetrically. Therefore, these nanozymes might be used as effective antibacterial agents and also for the consumption of reactive oxygen species.
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Affiliation(s)
- Ankita Shome
- Department of Chemistry, University of North Bengal, Darjeeling 734013, West Bengal, India
| | - Salim Ali
- Department of Chemistry, University of North Bengal, Darjeeling 734013, West Bengal, India
| | - Md Salman Haydar
- Department of Botany, University of North Bengal, Siliguri 734013, West Bengal, India
| | - Kushankur Sarkar
- Department of Botany, University of North Bengal, Siliguri 734013, West Bengal, India
| | - Swarnendu Roy
- Department of Botany, University of North Bengal, Siliguri 734013, West Bengal, India
| | - Prakriti Adhikary
- Department of Physics, University of North Bengal, Darjeeling 734013, West Bengal, India
| | - Mahendra Nath Roy
- Department of Chemistry, University of North Bengal, Darjeeling 734013, West Bengal, India
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Chen D, Xia Z, Guo Z, Gou W, Zhao J, Zhou X, Tan X, Li W, Zhao S, Tian Z, Qu Y. Bioinspired porous three-coordinated single-atom Fe nanozyme with oxidase-like activity for tumor visual identification via glutathione. Nat Commun 2023; 14:7127. [PMID: 37949885 PMCID: PMC10638392 DOI: 10.1038/s41467-023-42889-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 10/25/2023] [Indexed: 11/12/2023] Open
Abstract
Inspired by structures of natural metalloenzymes, a biomimetic synthetic strategy is developed for scalable synthesis of porous Fe-N3 single atom nanozymes (pFeSAN) using hemoglobin as Fe-source and template. pFeSAN delivers 3.3- and 8791-fold higher oxidase-like activity than Fe-N4 and Fe3O4 nanozymes. The high catalytic performance is attributed to (1) the suppressed aggregation of atomically dispersed Fe; (2) facilitated mass transfer and maximized exposure of active sites for the created mesopores by thermal removal of hemoglobin (2 ~ 3 nm); and (3) unique electronic configuration of Fe-N3 for the oxygen-to-water oxidation pathway (analogy with natural cytochrome c oxidase). The pFeSAN is successfully demonstrated for the rapid colorimetric detection of glutathione with a low limit of detection (2.4 nM) and wide range (50 nM-1 mM), and further developed as a real-time, facile, rapid (~6 min) and precise visualization analysis methodology of tumors via glutathione level, showing its potentials for diagnostic and clinic applications.
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Affiliation(s)
- Da Chen
- Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, 710072, Xi'an, China
| | - Zhaoming Xia
- Department of Chemistry, Southern University of Science and Technology, 518055, Shenzhen, China
| | - Zhixiong Guo
- Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, 710072, Xi'an, China
| | - Wangyan Gou
- Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, 710072, Xi'an, China
| | - Junlong Zhao
- State Key Laboratory of Cancer Biology, Department of Medical Genetics and Developmental Biology, Fourth Military Medical University, 710032, Xi'an, China
| | - Xuemei Zhou
- Key Laboratory of Carbon Materials of Zhejiang Province, Wenzhou University, 325035, Wenzhou, China
| | - Xiaohe Tan
- Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, 710072, Xi'an, China
| | - Wenbin Li
- Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, 710072, Xi'an, China
| | - Shoujie Zhao
- State Key Laboratory of Cancer Biology, Department of Medical Genetics and Developmental Biology, Fourth Military Medical University, 710032, Xi'an, China
| | - Zhimin Tian
- Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, 710072, Xi'an, China.
| | - Yongquan Qu
- Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, 710072, Xi'an, China.
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Xu Y, Zhou Z, Deng N, Fu K, Zhu C, Hong Q, Shen Y, Liu S, Zhang Y. Molecular insights of nanozymes from design to catalytic mechanism. Sci China Chem 2023; 66:1318-1335. [PMID: 36817323 PMCID: PMC9923663 DOI: 10.1007/s11426-022-1529-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 02/01/2023] [Indexed: 02/15/2023]
Abstract
Emerging as cost-effective potential alternatives to natural enzymes, nanozymes have attracted increasing interest in broad fields. To exploit the in-depth potential of nanozymes, rational structural engineering and explicit catalytic mechanisms at the molecular scale are required. Recently, impressive progress has been made in mimicking the characteristics of natural enzymes by constructing metal active sites, binding pockets, scaffolds, and delicate allosteric regulation. Ingenious in-depth studies have been conducted with advances in structural characterization and theoretical calculations, unveiling the "black box" of nanozyme-catalytic mechanisms. This review introduces the state-of-art synthesis strategies by learning from the natural enzyme counterparts and summarizes the general overview of the nanozyme mechanism with a particular emphasis on the adsorbed intermediates and descriptors that predict the nanozyme activity The emerging activity assessment methodology that illustrates the relationship between electrochemical oxygen reduction and enzymatic oxygen reduction is discussed with up-to-date advances Future opportunities and challenges are presented in the end to spark more profound work and attract more researchers from various backgrounds to the flourishing field of nanozymes.
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Affiliation(s)
- Yuan Xu
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical Engineering, Medical School, Southeast University, Nanjing, 211189 China
| | - Zhixin Zhou
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical Engineering, Medical School, Southeast University, Nanjing, 211189 China
| | - Nankai Deng
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical Engineering, Medical School, Southeast University, Nanjing, 211189 China
| | - Kangchun Fu
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical Engineering, Medical School, Southeast University, Nanjing, 211189 China
| | - Caixia Zhu
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical Engineering, Medical School, Southeast University, Nanjing, 211189 China
| | - Qing Hong
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical Engineering, Medical School, Southeast University, Nanjing, 211189 China
| | - Yanfei Shen
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical Engineering, Medical School, Southeast University, Nanjing, 211189 China
| | - Songqin Liu
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical Engineering, Medical School, Southeast University, Nanjing, 211189 China
| | - Yuanjian Zhang
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical Engineering, Medical School, Southeast University, Nanjing, 211189 China
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Ali S, Sikdar S, Basak S, Roy D, Das D, Haydar MS, Ghosh NN, Roy K, Mandal P, Roy MN. Intrinsic Light-Activated Oxidase Mimicking Activity of Conductive Polyaniline Nanofibers: A Class of Metal-Free Nanozyme. ACS APPLIED BIO MATERIALS 2022; 5:5518-5531. [PMID: 36367462 DOI: 10.1021/acsabm.2c00491] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
In recent decades, studies have focused on inorganic nanozymes to overcome the intrinsic drawbacks of bioenzymes due to the demands of improving the reaction conditions and lack of robustness to harsh environmental factors. Many biochemical reactions catalyzed by enzymes require light activation. Light-activated nanozymes have distinct advantages, including being regulated by light stimuli, activating the molecular oxygen to produce reactive oxygen species (ROS) without interfering supplementary oxidants, and often showing a synergistic effect to catalyze some challenging reactions. Only a few studies have been done on this connection. Therefore, it is still a big challenge to develop a nanozyme regulated by light activation. Herein, we uncovered the light-activated oxidase mimicking activity of a conducting polymer polyaniline nanofibers (PANI-NFs). PANI-NFs exhibit intrinsic light-activated brilliant oxidase-like activity, can catalyze the colorless tetramethyl benzidine (TMB) to produce a blue product TMBox, and have a distinct Km = 0.087 mM and a high Vmax = 2.32 μM min-1 value, measured by using Hanes-Woolf kinetics. We also report the light-activated oxidase activity of some other renowned carbocatalysts graphene oxide and graphitic carbon nitride and compare them with PANI-NFs. This type of property shown by the conductive polymer is amazing. The density functional theory is used to verify the stability and the mode of adsorption of the PANI NFs-TMB composite, which corroborates the experimental results. Furthermore, the current nanozyme demonstrated a significant ability to kill both Gram-negative and Gram-positive bacteria as well as effectively destroy biofilms under physiological conditions. We believe that this work provides the motivation to create a link between optoelectronics and biological activity in the near future.
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Affiliation(s)
- Salim Ali
- Department of Chemistry, University of North Bengal, Darjeeling734013, India
| | - Suranjan Sikdar
- Department of Chemistry, Government General Degree College at Kushmandi, Dakshin Dinajpur733121, India
| | - Shatarupa Basak
- Department of Chemistry, University of North Bengal, Darjeeling734013, India
| | - Debadrita Roy
- Department of Chemistry, University of North Bengal, Darjeeling734013, India
| | - Dipayan Das
- Nanobiology and Phytotherapy Laboratory, Department of Botany, University of North Bengal, Siliguri734013, West Bengal, India
| | - Md Salman Haydar
- Nanobiology and Phytotherapy Laboratory, Department of Botany, University of North Bengal, Siliguri734013, West Bengal, India
| | | | - Kanak Roy
- Department of Chemistry, Alipurduar University, Alipurduar736122, India
| | - Palash Mandal
- Nanobiology and Phytotherapy Laboratory, Department of Botany, University of North Bengal, Siliguri734013, West Bengal, India
| | - Mahendra Nath Roy
- Department of Chemistry, University of North Bengal, Darjeeling734013, India.,Department of Chemistry, Alipurduar University, Alipurduar736122, India
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6
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Liu Q, Wei H, Du Y. Microfluidic bioanalysis based on nanozymes. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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7
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Liu Q, Zhao S, Zhang Y, An X, Wang Q, Li S, Lin A, Du Y, Wei H. Biochar Nanozyme from Silkworm Excrement for Scavenging Vapor-Phase Free Radicals in Cigarette Smoke. ACS APPLIED BIO MATERIALS 2022; 5:1831-1838. [PMID: 35014833 DOI: 10.1021/acsabm.1c01080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Serious lung diseases and other health problems caused by tobacco consumption are becoming more and more prominent all over the world. Scavenging the excessive harmful free radicals in cigarette smoke is proven to be an effective method in reducing the above problems. Carbon-based nanozymes have been widely studied due to their ability of scavenging free radicals. Accordingly, the biochar derived from silkworm excrement was reported as a nanozyme with free radical scavenging ability. The biochar nanozyme calcination at 900 °C with better free radical scavenging abilities was loaded into commercial cigarette filters for the following free radical scavenging verification in tobacco smoke. Mouse model results reveal the lung tissue could be improved by the addition of biochar nanozyme. This work not only provides an effective approach to reduce the harm caused by tobacco but also provides potential applications to rationally realize low-cost, ease of production, and a wide variety of biochar sources.
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Affiliation(s)
- Quanyi Liu
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
- University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Sheng Zhao
- Department of Biomedical Engineering, College of Engineering and Applied Sciences, Nanjing National Laboratory of Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Yihong Zhang
- Department of Biomedical Engineering, College of Engineering and Applied Sciences, Nanjing National Laboratory of Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Xueying An
- State Key Laboratory of Pharmaceutical Biotechnology and Jiangsu Key Laboratory of Molecular Medicine, Nanjing University Medical School, Nanjing, Jiangsu 210023, China
- Department of Sports Medicine and Adult Reconstructive Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu 210093, China
| | - Quan Wang
- Department of Biomedical Engineering, College of Engineering and Applied Sciences, Nanjing National Laboratory of Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Sirong Li
- Department of Biomedical Engineering, College of Engineering and Applied Sciences, Nanjing National Laboratory of Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Anqi Lin
- Department of Biomedical Engineering, College of Engineering and Applied Sciences, Nanjing National Laboratory of Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Yan Du
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
- University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Hui Wei
- Department of Biomedical Engineering, College of Engineering and Applied Sciences, Nanjing National Laboratory of Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, Jiangsu 210023, China
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Chemistry and Biomedicine Innovation Center (ChemBIC), Nanjing University, Nanjing, Jiangsu 210023, China
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Zhang C, Zhang X, Ye Y, Ni P, Chen C, Liu W, Wang B, Jiang Y, Lu Y. Manganese-doped iron coordination polymer nanoparticles with enhanced peroxidase-like activity for colorimetric detection of antioxidants. Analyst 2021; 147:238-246. [PMID: 34913935 DOI: 10.1039/d1an01953h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A convenient and sensitive antioxidant assay with high performance is essential for assessing food quality and monitoring the oxidative stress level of biological matrices. Although coordination polymer nanoparticles (CPNs)-based nanozymes have emerged as candidates in the analytical field, strategies to improve the catalytic activity of CPNs have been scarcely revealed and studied. Herein, we demonstrate a manganese (Mn) doping strategy to enhance the peroxidase-mimetic activity of Fe-based CPNs. By tuning the Mn doping amounts and selecting 2,5-dihydroxyterephthalic acid (H4DHTP) as ligands, the produced nanozymes in amorphous state followed the catalytic activity order of Fe5Mn-DHTP > Fe8Mn-DHTP > Fe2Mn-DHTP > Fe-DHTP > Mn-DHTP. Ulteriorly, benefitting from the best catalytic performance and definite catalytic mechanism of Fe5Mn-DHTP, versatile colorimetric assays for ultrasensitive detection of one exogenous antioxidant (ascorbic acid, AA) and two endogenous antioxidants (glutathione, GSH; cysteine, Cys) have been deftly devised based on the inhibition of the 3,3',5,5'-tetramethylbenzidine chromogenic reaction in presence of H2O2. It was found that mercaptan (GSH and Cys) and AA exhibited different inhibition mechanisms. Practically, such a colorimetric assay was viable to determine the total antioxidant capacity of drugs and foods with desirable results. This work proposes a feasible strategy for embellishing CPN nanozymes used for designing sensitive and convenient assays for various antioxidants based on an explicit detection mechanism.
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Affiliation(s)
- Chenghui Zhang
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, P. R. China.
| | - Xingfeng Zhang
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, P. R. China.
| | - Yu Ye
- State Key Lab of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Pengjuan Ni
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, P. R. China.
| | - Chuanxia Chen
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, P. R. China.
| | - Wendong Liu
- School of Science Tianjin University, Tianjin University, Tianjin 300350, China
| | - Bo Wang
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, P. R. China.
| | - Yuanyuan Jiang
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, P. R. China.
| | - Yizhong Lu
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, P. R. China.
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