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Xu R, Li L, Zheng J, Ji C, Wu H, Chen X, Chen Y, Hu M, Xu EG, Wang Y. Combined toxic effects of nanoplastics and norfloxacin on mussel: Leveraging biochemical parameters and gut microbiota. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 880:163304. [PMID: 37030355 DOI: 10.1016/j.scitotenv.2023.163304] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 03/31/2023] [Accepted: 04/01/2023] [Indexed: 05/27/2023]
Abstract
Antibiotics and nanoplastics (NPs) are among the two most concerned and studied marine emerging contaminants in recent years. Given the large number of different types of antibiotics and NPs, there is a need to apply efficient tools to evaluate their combined toxic effects. Using the thick-shelled mussel (Mytilus coruscus) as a marine ecotoxicological model, we applied a battery of fast enzymatic activity assays and 16S rRNA sequencing to investigate the biochemical and gut microbial response of mussels exposed to antibiotic norfloxacin (NOR) and NPs (80 nm polystyrene beads) alone and in combination at environmentally relevant concentrations. After 15 days of exposure, NPs alone significantly inhibited superoxide dismutase (SOD) and amylase (AMS) activities, while catalase (CAT) was affected by both NOR and NPs. The changes in lysozyme (LZM) and lipase (LPS) were increased over time during the treatments. Co-exposure to NPs and NOR significantly affected glutathione (GSH) and trypsin (Typ), which might be explained by the increased bioavailable NOR carried by NPs. The richness and diversity of the gut microbiota of mussels were both decreased by exposures to NOR and NPs, and the top functions of gut microbiota that were affected by the exposures were predicted. The data fast generated by enzymatic test and 16S sequencing allowed further variance and correlation analysis to understand the plausible driving factors and toxicity mechanisms. Despite the toxic effects of only one type of antibiotics and NPs being evaluated, the validated assays on mussels are readily applicable to other antibiotics, NPs, and their mixture.
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Affiliation(s)
- Ran Xu
- International Research Center for Marine Biosciences, College of Fisheries and Life Science at Shanghai Ocean University, Ministry of Science and Technology, Shanghai 201306, China; Key laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China
| | - Li'ang Li
- International Research Center for Marine Biosciences, College of Fisheries and Life Science at Shanghai Ocean University, Ministry of Science and Technology, Shanghai 201306, China; Key laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China
| | - Jiahui Zheng
- International Research Center for Marine Biosciences, College of Fisheries and Life Science at Shanghai Ocean University, Ministry of Science and Technology, Shanghai 201306, China; Key laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China
| | - Chenglong Ji
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences (CAS), Shandong Key Laboratory of Coastal Environmental Processes, Yantai 264003, China
| | - Huifeng Wu
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences (CAS), Shandong Key Laboratory of Coastal Environmental Processes, Yantai 264003, China
| | - Xiang Chen
- International Research Center for Marine Biosciences, College of Fisheries and Life Science at Shanghai Ocean University, Ministry of Science and Technology, Shanghai 201306, China; Key laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China
| | - Yuchuan Chen
- International Research Center for Marine Biosciences, College of Fisheries and Life Science at Shanghai Ocean University, Ministry of Science and Technology, Shanghai 201306, China; Key laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China
| | - Menghong Hu
- International Research Center for Marine Biosciences, College of Fisheries and Life Science at Shanghai Ocean University, Ministry of Science and Technology, Shanghai 201306, China; Key laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China
| | - Elvis Genbo Xu
- Department of Biology, University of Southern Denmark, Odense M 5230, Denmark.
| | - Youji Wang
- International Research Center for Marine Biosciences, College of Fisheries and Life Science at Shanghai Ocean University, Ministry of Science and Technology, Shanghai 201306, China; Key laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China.
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Corrêa GA, de Castro B, Rebelo SL. Binuclear Mn(III) and Fe(III) porphyrin nanostructured materials in catalytic reduction of 4-nitrophenol. Catal Today 2023. [DOI: 10.1016/j.cattod.2023.114149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/09/2023]
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Mu WY, Chen CH, Chen QY. Bacterium-Sculpted Porphyrin-Protein-Iron Sulfide Clusters for Distinction and Inhibition of Staphylococcus aureus. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:10385-10391. [PMID: 35980392 DOI: 10.1021/acs.langmuir.2c00964] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Microbe-catalyzed surface modification is a promising method for the production of special targeting nanomaterials. A bacterium-selective material can be obtained by investigating the microbe-catalyzed mineralization of proteins. Herein, a novel method was fabricated for the biosynthesis of FeS-decorated porphyrin-protein clusters (P-CA@BE) via E. coli (Escherichia coli)-catalyzed bio-Fe(III) reduction and bio-sulfidation of porphyrin (P), caffeic acid (CA), and protein [bovine serum albumin (BSA)] assemblies. The assembly (P-CA@BSA) was identified by spectroscopic methods. Next, the P-CA@BSA assembly was transferred into FeS-decorated porphyrin-protein clusters (P-CA@BE) catalyzed by E. coli. There are partial β-folding proteins in P-CA@BE, which selectively recognize S. aureus (Staphylococcus aureus) and show different antibacterial properties against E. coli and S. aureus. Results demonstrate that the E. coli-catalyzed mineralization of the porphyrin-protein assembly is an effective method for the biosynthesis of S. aureus-sensitive metal-protein clusters.
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Affiliation(s)
- Wei-Yu Mu
- School of Chemistry and Chemical Engineering, Jiangsu University, Xuefu Road, Jingkou District, Zhenjiang 212013, People's Republic of China
| | - Cai-Hua Chen
- School of Chemistry and Chemical Engineering, Jiangsu University, Xuefu Road, Jingkou District, Zhenjiang 212013, People's Republic of China
| | - Qiu-Yun Chen
- School of Chemistry and Chemical Engineering, Jiangsu University, Xuefu Road, Jingkou District, Zhenjiang 212013, People's Republic of China
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de Souza Santos LV, Lebron YAR, Moreira VR, Jacob RS, Martins DCDS, Lange LC. Norfloxacin and gentamicin degradation catalyzed by manganese porphyrins under mild conditions: the importance of toxicity assessment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:16203-16212. [PMID: 34647211 DOI: 10.1007/s11356-021-16850-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 09/28/2021] [Indexed: 06/13/2023]
Abstract
The current work assessed the degradation degree and the degradation products derived from norfloxacin (NOR) and gentamicin (GEN) using iodosylbenzene and iodobenzene diacetate, in the presence of manganese porphyrin as catalysts. Better results for NOR degradation (> 80%) were obtained when more hydrophobic porphyrins were employed. β-brominated manganese porphyrins showed a lower GEN degradation (~ 25%) than the non-brominated ones (~ 35%), probably due to their steric hindrance. In any case, complete mineralization was achieved neither for NOR nor for GEN, and the assignment of the generated products, complemented by the study of their toxicity, was an important step performed. From the obtained results, no correlation was found between the number of identified products and the reported toxicity value (rSpearman,NOR = 0.006; p value = 0.986 and rSpearman,GEN = - 0,198; p value = 0.583), which reinforces the idea of synergism and antagonistic phenomena. The higher degradation degree could have led to products of lower steric hindrance and easier penetration into the A. fischeri cells, which subsequently led to an increase in toxicity for these experiments. In most cases, the products presented higher toxicity than the original compound, which raises a concern about their occurrence in environmental matrices.
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Affiliation(s)
- Lucilaine Valéria de Souza Santos
- Department of Sanitary and Environmental Engineering, Universidade Federal de Minas Gerais, P.O. Box 1294, Belo Horizonte, MG, 30270-901, Brazil.
- Department of Chemical Engineering, Pontifícia Universidade Católica de Minas Gerais, P.O. Box 1686, Belo Horizonte, MG, 30535-901, Brazil.
| | - Yuri Abner Rocha Lebron
- Department of Sanitary and Environmental Engineering, Universidade Federal de Minas Gerais, P.O. Box 1294, Belo Horizonte, MG, 30270-901, Brazil
| | - Victor Rezende Moreira
- Department of Sanitary and Environmental Engineering, Universidade Federal de Minas Gerais, P.O. Box 1294, Belo Horizonte, MG, 30270-901, Brazil
| | - Raquel Sampaio Jacob
- Department of Civil Engineering, Pontifícia Universidade Católica de Minas Gerais, P.O. Box 1686, Belo Horizonte, MG, 30535-901, Brazil
| | | | - Lisete Celina Lange
- Department of Sanitary and Environmental Engineering, Universidade Federal de Minas Gerais, P.O. Box 1294, Belo Horizonte, MG, 30270-901, Brazil
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Wang W, Wang J, Chen QY, Liu QS, Liang X. A Photo-Responsive Porphyrin-Mn@Choles Complex for Bacteria Treatment. J Inorg Organomet Polym Mater 2021. [DOI: 10.1007/s10904-021-02148-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Abstract
Nowadays, society’s widespread consumption of pharmaceutical drugs and the consequent accumulation of such compounds or their metabolites in effluents requires the development of efficient strategies and systems that lead to their effective degradation. This can be done through oxidative processes, in which tetrapyrrolic macrocycles (porphyrins, phthalocyanines) deserve special attention since they are among the most promising degradation catalysts. This paper presents a review of the literature over the past ten years on the major advances made in the development of oxidation processes of pharmaceuticals in aqueous solutions using tetrapyrrole-based catalysts. The review presents a brief discussion of the mechanisms involved in these oxidative processes and is organized by the degradation of families of pharmaceutical compounds, namely antibiotics, analgesics and neurological drugs, among others. For each family, a critical analysis and discussion of the fundamental roles of tetrapyrrolic macrocycles are presented, regarding both photochemical degradative processes and direct oxidative chemical degradation.
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Meireles AM, Guimarães AS, Querino GR, Castro KADDF, Nakagaki S, DeFreitas‐Silva G. Exploring manganese pyridylporphyrin isomers for cyclohexane oxidation: First‐generation catalysts are better than third‐generation ones. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Alexandre Moreira Meireles
- Departamento de Química, Instituto de Ciências Exatas Universidade Federal de Minas Gerais Belo Horizonte Minas Gerais Brazil
| | - Adriano Silva Guimarães
- Departamento de Química, Instituto de Ciências Exatas Universidade Federal de Minas Gerais Belo Horizonte Minas Gerais Brazil
| | - Guilherme Rabelo Querino
- Departamento de Química, Instituto de Ciências Exatas Universidade Federal de Minas Gerais Belo Horizonte Minas Gerais Brazil
| | | | - Shirley Nakagaki
- Laboratório de Bioinorgânica e Catálise, Departamento de Química, Centro Politécnico Universidade Federal do Paraná Curitiba Paraná Brazil
| | - Gilson DeFreitas‐Silva
- Departamento de Química, Instituto de Ciências Exatas Universidade Federal de Minas Gerais Belo Horizonte Minas Gerais Brazil
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Lage ALA, Marciano AC, Venâncio MF, da Silva MAN, Martins DCDS. Water-soluble manganese porphyrins as good catalysts for cipro- and levofloxacin degradation: Solvent effect, degradation products and DFT insights. CHEMOSPHERE 2021; 268:129334. [PMID: 33360938 DOI: 10.1016/j.chemosphere.2020.129334] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 12/05/2020] [Accepted: 12/13/2020] [Indexed: 06/12/2023]
Abstract
Synthetic manganese porphyrins (MnPs), in the presence of oxidants, were employed for the degradation of fluoroquinolone antibiotics. Ciprofloxacin (CIP) and levofloxacin (LEV) degradation by iodosylbenzene, iodobenzene diacetate, H2O2 and meta-chloroperbenzoic acid using water-soluble MnP catalysts yielded thirteen and nine products, respectively, seven of which have been proposed for the first time. The MnP catalysts have demonstrated the ability to degrade these antibiotics to a high degree (up to 100% degradation). The structures of the degradation products were proposed based on mass spectrometry analysis, and density functional theory calculations could confirm how the substituent moieties attached to the basic chemical structure of the fluoroquinolones influence the degradation reactions. CIP has been shown to be a more reactive substrate towards the porphyrinic catalysts tested because of its three-membered ring. However, the catalysts could almost completely degrade LEV, highlighting the ability of these porphyrins to act as catalysts to degrade environmental pollutants.
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Affiliation(s)
- Ana Luísa Almeida Lage
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, 31270-901, Belo Horizonte, MG, Brazil
| | - Aline Capelão Marciano
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, 31270-901, Belo Horizonte, MG, Brazil
| | - Mateus Fernandes Venâncio
- Departamento de Físico-Química, Instituto de Química, Universidade Federal da Bahia, Campus Universitário de Ondina, 40170-110, Salvador, BA, Brazil
| | - Mirra Angelina Neres da Silva
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, 31270-901, Belo Horizonte, MG, Brazil
| | - Dayse Carvalho da Silva Martins
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, 31270-901, Belo Horizonte, MG, Brazil.
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Bolzon LB, Bindeiro AKDS, de Oliveira Souza ALM, Zanatta LD, de Paula R, Cerqueira BC, dos Santos JS. Rhodamine B oxidation promoted by P450-bioinspired Jacobsen catalysts/cellulose systems. RSC Adv 2021; 11:33823-33834. [PMID: 35497525 PMCID: PMC9042282 DOI: 10.1039/d1ra04915a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 08/19/2021] [Indexed: 11/21/2022] Open
Abstract
P450-bioinspired Jacobsen/Cell(NEt2) catalysts have been applied in RhB dye oxidation, which is used illegally in food industries of some countries.
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Affiliation(s)
- Lucas Bomfim Bolzon
- Grupo de Pesquisa em Bioinorgânica e Catálise (GPBioCat), Departamento de Química Geral e Inorgânica, IQ-UFBA, R. Barão de Jeremoabo 147, Campus de Ondina, 40170-115 Salvador, BA, Brazil
| | - Anna Karolina dos Santos Bindeiro
- Grupo de Pesquisa em Bioinorgânica e Catálise (GPBioCat), Departamento de Química Geral e Inorgânica, IQ-UFBA, R. Barão de Jeremoabo 147, Campus de Ondina, 40170-115 Salvador, BA, Brazil
| | - Ana Luiza Marques de Oliveira Souza
- Grupo de Pesquisa em Bioinorgânica e Catálise (GPBioCat), Departamento de Química Geral e Inorgânica, IQ-UFBA, R. Barão de Jeremoabo 147, Campus de Ondina, 40170-115 Salvador, BA, Brazil
| | - Lucas Dimarô Zanatta
- Laboratório de Bioinorgânica, Departamento de Química, FFCLRP-USP, Av. Bandeirantes 3900, 14040-901, Ribeirão Preto, SP, Brazil
| | - Rodrigo de Paula
- Centro de Formação de Professores, UFRB, Av. Nestor de Melo Pita 535, Campus de Amargosa, 45300-000, Amargosa, BA, Brazil
- Programa de Pós-Graduação em Química Pura e Aplicada-POSQUIPA, Universidade Federal do Oeste da Bahia, Rua Bertioga, 892, Morada Real, 47810-059, Barreiras, BA, Brazil
| | - Bruna Costa Cerqueira
- Centro de Formação de Professores, UFRB, Av. Nestor de Melo Pita 535, Campus de Amargosa, 45300-000, Amargosa, BA, Brazil
| | - Joicy Santamalvina dos Santos
- Grupo de Pesquisa em Bioinorgânica e Catálise (GPBioCat), Departamento de Química Geral e Inorgânica, IQ-UFBA, R. Barão de Jeremoabo 147, Campus de Ondina, 40170-115 Salvador, BA, Brazil
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Magnetic Nanoparticles with Dual Surface Functions-Efficient Carriers for Metalloporphyrin-Catalyzed Drug Metabolite Synthesis in Batch and Continuous-Flow Reactors. NANOMATERIALS 2020; 10:nano10122329. [PMID: 33255480 PMCID: PMC7759782 DOI: 10.3390/nano10122329] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 11/14/2020] [Accepted: 11/18/2020] [Indexed: 01/02/2023]
Abstract
The dual functionalization of magnetic nanoparticles with inert (methyl) and reactive (aminopropyl) groups enables efficient immobilization of synthetic metalloporphyrins (such as 5,10,15,20-tetrakis(2,3,4,5,6-pentafluorophenyl)iron(II) porphyrin and 5,10,15,20-tetrakis-(4-sulfonatophenyl)iron(II) porphyrin) via covalent or ionic interactions. The proportion of reactive function on the surface has significant effect on the biomimetic activity of metalloporphyrins. The optimized magnetic nanocatalyst containing porphyrin was successfully applied for biomimetic oxidation of antihypertensive drug Amlodipine in batch and continuous-flow reactors as well.
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Chen M, Liu J, Bi Y, Rehman S, Dang Z, Wu P. Multifunctional magnetic MgMn-oxide composite for efficient purification of Cd 2+ and paracetamol pollution: Synergetic effect and stability. JOURNAL OF HAZARDOUS MATERIALS 2020; 388:122078. [PMID: 31962212 DOI: 10.1016/j.jhazmat.2020.122078] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 01/10/2020] [Accepted: 01/11/2020] [Indexed: 06/10/2023]
Abstract
A multifunctional magnetic composite (0.3Ma-MgMnLDO-a) with the function of Cd2+ adsorption and paracetamol (PAM) degradation was successfully fabricated. Surface morphology showed that Fe3O4 agglomeration was overcome on composite. The composite had high specific surface area of 105.32 m2 g-1 and saturation magnetization of 40 emu∙g-1. 0.3Ma-MgMnLDO-a could reach Cd2+ adsorption equilibrium within 5 min with 99 % removal rate. The maximum adsorption capacity was 3.76 mmol·g-1 (422.62 mg g-1), which apparently higher than that of Fe3O4-a and MgMnLDO-a, indicating that the Fe/Mn synergism results in excellent ability for Cd2+ adsorption. Moreover, the composite could efficiently activate peroxymonosulfate (PMS) to rapid degrade PAM with the highest first-order rate constants (kobs = 0.116 min-1) and total organic carbon (TOC) removal rate (67.7 %), which also due to the contribution of Fe/Mn synergism in PMS activation. The cycling of MnIII/MnIV and FeII/FeIII played an important role in activating PMS to generateO2-•, 1O2 and OH for degradation. The composite exhibited both stable adsorption and catalytic performance on wide pH (3-9) and five reuse cycles. Notably, there was mutual promotion between Cd2+ and PAM adsorption, while the coexistence of Cd2+ had slight inhibition on PAM degradation. Overall, the magnetic composite had promising application for purifying heavy metals and pharmaceuticals.
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Affiliation(s)
- Meiqing Chen
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, PR China
| | - Juan Liu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, PR China
| | - Yingzhi Bi
- School of Geoscience, The University of Edinburgh, Edinburgh, England, United Kingdom
| | - Saeed Rehman
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, PR China
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, PR China; Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| | - Pingxiao Wu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, PR China; Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China.
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Ávila-Torres Y, Acosta J, Huerta L, Toscano A, González FJ, Behrens NB. Experimental data on synthesis and characterization of chiral dinuclear manganese (II-II) compounds as biomimetic models of the active center of catalase. Data Brief 2020; 28:104883. [PMID: 31886345 PMCID: PMC6920486 DOI: 10.1016/j.dib.2019.104883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 11/18/2019] [Accepted: 11/19/2019] [Indexed: 11/25/2022] Open
Abstract
Dinuclear manganese (II– III) compounds, which are potential models of the active center of catalase, were synthetized. This type of metalloenzymes presents biological importance due to three factors: they are redox catalyst centres, they are able to carry out hydrolytic reactions and they participate in activated processes via Lewis acids. Structurally, their active centre is composed by dinuclear manganese compounds, linked to nitrogen and oxygen donor atoms. An octahedral geometry around the metal ions were found, with acetate, hydroxy and aquo ligands; which can work as molecule bridges between them. The acid medium favours the electronic transfer between Mn3+ - Mn2+ as redox centre at 1.559 V and the consequent oxidation of hydrogen peroxide or organic molecules. The work also reports the data of two chiral novel compounds, [Mn2(S,S(+)Hcpse)4(NaClO4)2(NaOH)(CH4O)]n·[(C2H6O)2]n·[(CH4O)2]n and its respective enantioisomer, in which μ-oxo being as bridge metal centre. The X-ray structural was obtained as well as the optical and magnetic properties using Circular Dichroism, Electronic Paramagnetic Resonance, Magnetic Susceptibility and X-ray photoelectron spectroscopy.
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