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Kalinke C, Zanicoski-Moscardi AP, de Oliveira PR, Mangrich AS, Marcolino-Junior LH, Bergamini MF. Simple and low-cost sensor based on activated biochar for the stripping voltammetric detection of caffeic acid. Microchem J 2020. [DOI: 10.1016/j.microc.2020.105380] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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2
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Kalinke C, Wosgrau V, Oliveira PR, Oliveira GA, Martins G, Mangrich AS, Bergamini MF, Marcolino-Junior LH. Green method for glucose determination using microfluidic device with a non-enzymatic sensor based on nickel oxyhydroxide supported at activated biochar. Talanta 2019; 200:518-525. [DOI: 10.1016/j.talanta.2019.03.079] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 03/19/2019] [Accepted: 03/20/2019] [Indexed: 01/22/2023]
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3
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Doumer ME, Vidal M, Mangrich AS, Rigol A. Feasibility of using low-cost, byproduct materials as sorbents to remove heavy metals from aqueous solutions. Environ Technol 2019; 40:2300-2309. [PMID: 29436939 DOI: 10.1080/09593330.2018.1440011] [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] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Accepted: 02/09/2018] [Indexed: 06/08/2023]
Abstract
This work investigates the sorption of heavy metals by low-cost, byproducts such as charcoal fines (CF), waste green sand, and rice husk ash, in order to examine the feasibility of their use as alternative filter materials for metal-contaminated waters. The sorption of Cd, Cu, Pb, and Zn was investigated in batch experiments and sorption isotherms were constructed. The three byproducts showed high metal removal efficiencies (>95%, regardless of the metal concentration tested). The highest metal sorption distribution coefficients were obtained for CF, with maximum values within the 105-106 L kg-1 range for all the target metals. The sorption isotherms were satisfactorily fitted using the Freundlich equation and a linear model, the latter only being valid for initial metal concentrations lower than 0.4 mmol L-1. Sorption reversibility was very low, with desorption yields lower than 2% and desorption distribution coefficients often higher than 106 L kg-1. The values of the sorption and desorption parameters indicated that the use of these materials, especially CF, could constitute a low-cost alternative for the remediation of contaminated waters.
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Affiliation(s)
- Marta E Doumer
- a Department of Chemistry, Federal University of Paraná (UFPR) , Curitiba , PR , Brazil
| | - Miquel Vidal
- b Department of Chemical Engineering and Analytical Chemistry, University of Barcelona , Barcelona , Spain
| | - Antonio S Mangrich
- a Department of Chemistry, Federal University of Paraná (UFPR) , Curitiba , PR , Brazil
| | - Anna Rigol
- b Department of Chemical Engineering and Analytical Chemistry, University of Barcelona , Barcelona , Spain
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Batista EMCC, Shultz J, Matos TTS, Fornari MR, Ferreira TM, Szpoganicz B, de Freitas RA, Mangrich AS. Effect of surface and porosity of biochar on water holding capacity aiming indirectly at preservation of the Amazon biome. Sci Rep 2018; 8:10677. [PMID: 30013110 PMCID: PMC6048162 DOI: 10.1038/s41598-018-28794-z] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 06/29/2018] [Indexed: 11/18/2022] Open
Abstract
As part of efforts to reduce pressure on the Amazon and other biomes, one approach considered by Brazilian authorities and scientists is more intensive use of the soils of the interior of the northeast of the country, which are generally sandy, with low contents of organic matter and low water holding capacity and are frequently affected by severe droughts. In this work, biochars produced from waste biomasses were tested for the improvement of these soils. The highest BET (Brunauer-Emmett-Teller) specific surface areas were observed for all biochars. In the pH range studied, the water hyacinth plants (WH) sample showed the most negative zeta potentials, as well as the highest water holding capacity (WHC) values, while the zeta potentials of two quartzarenic neosol soils were consistent with their WHC values. The results suggested that despite the effect of porosity on water retention, the zeta potential could be associated with the presence of negative charges by which hydrated cationic counterions were absorbed and retained. The surface energy and its polar and dispersive components were associated with water retention, with sugar cane bagasse, orange peel, and water hyacinth biochars presenting higher SE values and larger polar components.
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Affiliation(s)
- Estela M C C Batista
- Federal University of Paraná, Department of Chemistry, Curitiba, PR, 81531-980, Brazil
| | - Juliana Shultz
- Federal University of Paraná, Department of Chemistry, Curitiba, PR, 81531-980, Brazil
| | - Tassya T S Matos
- Federal University of Paraná, Department of Chemistry, Curitiba, PR, 81531-980, Brazil
| | - Mayara R Fornari
- Federal University of Paraná, Department of Chemistry, Curitiba, PR, 81531-980, Brazil
| | - Thuany M Ferreira
- Federal University of Santa Catarina, Department of Chemistry, Florianópolis, SC, 88040-900, Brazil
| | - Bruno Szpoganicz
- Federal University of Santa Catarina, Department of Chemistry, Florianópolis, SC, 88040-900, Brazil
| | - Rilton A de Freitas
- Federal University of Paraná, Department of Chemistry, Curitiba, PR, 81531-980, Brazil
| | - Antonio S Mangrich
- Federal University of Paraná, Department of Chemistry, Curitiba, PR, 81531-980, Brazil.
- National Institute of Science and Technology, Energy and Environment (INCT E&A), Salvador, BA, 40170-115, Brazil.
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de Jesus JHF, da C Cunha G, Cardoso EMC, Mangrich AS, Romão LPC. Evaluation of waste biomasses and their biochars for removal of polycyclic aromatic hydrocarbons. J Environ Manage 2017; 200:186-195. [PMID: 28577454 DOI: 10.1016/j.jenvman.2017.05.084] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 05/25/2017] [Accepted: 05/26/2017] [Indexed: 06/07/2023]
Abstract
This work evaluates the use of biomasses and their biochars as adsorbents to remove polycyclic aromatic hydrocarbons from water. Coconut waste (CW) and orange waste (OW) were pyrolyzed at 350 °C to produce the corresponding biochars (BCW and BOW). Adsorption tests using a mixed solution of benzo(a)anthracene, benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(a)pyrene, and dibenzo(a,h)anthracene showed removal percentages of 30.33-83.43% (CW), 47.09-83.02% (BCW), 24.20-74.25% (OW), and 23.84-84.02% (BOW). The adsorption mechanisms appeared to involve π-π interactions of similar groups of the adsorbate and adsorbent, together with hydrophobic effects. There was no indication of competition between the PAHs for the adsorption sites, and there was evidence of cooperative adsorption. The PAHs could be desorbed from the adsorbents with efficiencies in the range 34.88-72.32%, and the reuse of the adsorbents in two further cycles demonstrated their potential for use in the removal of PAHs from water.
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Affiliation(s)
- J H F de Jesus
- Department of Chemistry, Federal University of Sergipe (UFS), 49100-000 Aracaju, SE, Brazil
| | - G da C Cunha
- Department of Chemistry, Federal University of Sergipe (UFS), 49100-000 Aracaju, SE, Brazil
| | - E M C Cardoso
- Department of Chemistry, Federal University of Paraná (UFPR), 81531-990 Curitiba, PR, Brazil
| | - A S Mangrich
- Department of Chemistry, Federal University of Paraná (UFPR), 81531-990 Curitiba, PR, Brazil
| | - L P C Romão
- Department of Chemistry, Federal University of Sergipe (UFS), 49100-000 Aracaju, SE, Brazil.
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Machado IFDC, Schultz J, Peralta-Zamora P, Mangrich AS. Contribuição química para o plano de gerenciamento de águas residuais de serviços de saúde. QUIM NOVA 2017. [DOI: 10.21577/0100-4042.20170045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Araújo BR, Romão LPC, Doumer ME, Mangrich AS. Evaluation of the interactions between chitosan and humics in media for the controlled release of nitrogen fertilizer. J Environ Manage 2017; 190:122-131. [PMID: 28040588 DOI: 10.1016/j.jenvman.2016.12.059] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Revised: 12/22/2016] [Accepted: 12/24/2016] [Indexed: 06/06/2023]
Abstract
The aim of this study was to evaluate the interactions of peat, humic acids, and humin with urea dispersed in chitosan, in systems intended for the controlled release of urea. Spheres of chitosan with humic material and urea intentionally added to the media were prepared and characterized by means of elemental analysis (CHN), electron paramagnetic resonance (EPR), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR). The spheres possessed functional groups related to humic substances that interacted with the chitosan, and the presence of urea in the media was also confirmed after it has been added. Release experiments demonstrated that the samples released urea in a controlled manner that was dependent on pH, increasing in the order: pH 2.5 < pH 4.0 < pH 9.0. In soil experiments, the degree of release of urea (α) increased over time, with values of 0.44 for chitosan-humic acids-urea (CHAU), 0.48 for chitosan-peat-urea (CPTU), and 0.67 for chitosan-humin-urea (CHMU) obtained in the first day of the experiment. The release of urea did not exceed 70% after 7 days. The results demonstrated the potential of using peat, humic acids, and humin, in combination with chitosan, in order to manufacture controlled release urea fertilizers and contribute to reducing adverse environmental and economic impacts.
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Affiliation(s)
- Bruno R Araújo
- Department of Chemistry, Federal University of Sergipe, 49100-000, São Cristóvão, SE, Brazil
| | - Luciane P C Romão
- Department of Chemistry, Federal University of Sergipe, 49100-000, São Cristóvão, SE, Brazil.
| | - Marta E Doumer
- Department of Chemistry, Federal University of Paraná, 81531-990, Curitiba, PR, Brazil
| | - Antonio S Mangrich
- Department of Chemistry, Federal University of Sergipe, 49100-000, São Cristóvão, SE, Brazil; Department of Chemistry, Federal University of Paraná, 81531-990, Curitiba, PR, Brazil
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Ferre FT, Resende JA, Schultz J, Mangrich AS, Faria RB, Rocha AB, Scarpellini M. Catalytic promiscuity of mononuclear copper(II) complexes in mild conditions: Catechol and cyclohexane oxidations. Polyhedron 2017. [DOI: 10.1016/j.poly.2016.11.045] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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9
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Gevaerd A, de Oliveira PR, Mangrich AS, Bergamini MF, Marcolino-Junior LH. Evaluation of antimony microparticles supported on biochar for application in the voltammetric determination of paraquat. Materials Science and Engineering: C 2016; 62:123-9. [DOI: 10.1016/j.msec.2016.01.020] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 12/14/2015] [Accepted: 01/07/2016] [Indexed: 11/26/2022]
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Doumer ME, Rigol A, Vidal M, Mangrich AS. Removal of Cd, Cu, Pb, and Zn from aqueous solutions by biochars. Environ Sci Pollut Res Int 2016; 23:2684-2692. [PMID: 26438367 DOI: 10.1007/s11356-015-5486-3] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Accepted: 09/21/2015] [Indexed: 06/05/2023]
Abstract
Sorption and desorption of heavy metals (Cd, Cu, Pb, and Zn) was evaluated in biochars derived from sugarcane bagasse (SB), eucalyptus forest residues (CE), castor meal (CM), green coconut pericarp (PC), and water hyacinth (WH) as candidate materials for the treatment of contaminated waters and soils. Solid-liquid distribution coefficients depended strongly on the initial metal concentration, with K d,max values mostly within the range 10(3)-10(4) L kg(-1). For all biochars, up to 95 % removal of all the target metals from water was achieved. The WH biochar showed the highest K d,max values for all the metals, especially Cd and Zn, followed by CE (for Cd and Pb) and PC (for Cd, Pb, and Zn). Sorption data were fitted satisfactorily with Freundlich and linear models (in the latter case, for the low concentration range). The sorption appeared to be controlled by cationic exchange, together with specific surface complexation at low metal concentrations. The low desorption yields, generally less than 5 %, confirmed that the sorption process was largely irreversible and that the biochars could potentially be used in decontamination applications.
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Affiliation(s)
- M E Doumer
- Department of Chemistry, Federal University of Paraná-UFPR, 81531-990, Curitiba, PR, Brazil
| | - A Rigol
- Department of Analytical Chemistry, University of Barcelona, Martí i Franquès 1-11, 08028, Barcelona, Spain.
| | - M Vidal
- Department of Analytical Chemistry, University of Barcelona, Martí i Franquès 1-11, 08028, Barcelona, Spain
| | - A S Mangrich
- Department of Chemistry, Federal University of Paraná-UFPR, 81531-990, Curitiba, PR, Brazil
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Kalinke C, Mangrich AS, Marcolino-Junior LH, Bergamini MF. Carbon Paste Electrode Modified with Biochar for Sensitive Electrochemical Determination of Paraquat. ELECTROANAL 2015. [DOI: 10.1002/elan.201500640] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Nicolini J, Khan MY, Matsui M, Côcco LC, Yamamoto CI, Lopes WA, de Andrade JB, Pillon CN, Arizaga GGC, Mangrich AS. Evaluation of PAH contamination in soil treated with solid by-products from shale pyrolysis. Environ Monit Assess 2015; 187:4123. [PMID: 25399121 DOI: 10.1007/s10661-014-4123-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Accepted: 10/28/2014] [Indexed: 06/04/2023]
Abstract
The aim of this work was to evaluate the concentrations of polycyclic aromatic hydrocarbons (PAHs) in soils to which solid shale materials (SSMs) were added as soil conditioners. The SSMs were derived from the Petrosix pyrolysis process developed by Petrobras (Brazil). An improved ultrasonic agitation method was used to extract the PAHs from the solid samples (soils amended with SSMs), and the concentrations of the compounds were determined by gas chromatography coupled to mass spectrometry (GC-MS). The procedure provided satisfactory recoveries, detection limits, and quantification limits. The two-, three-, and four-ring PAHs were most prevalent, and the highest concentration was obtained for phenanthrene (978 ± 19 μg kg(-1) in a pyrolyzed shale sample). The use of phenanthrene/anthracene and fluoranthene/pyrene ratios revealed that the PAHs were derived from petrogenic rather than pyrogenic sources. The measured PAH concentrations did not exceed national or international limit values, suggesting that the use of SSMs as soil conditioners should not cause environmental damage.
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Affiliation(s)
- Jaqueline Nicolini
- Federal Institute of Paraná (IFPR), Câmpus Palmas, PRT 280, Palmas, PR, 85555-000, Brazil
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Vieira EFS, Lima PF, dos Santos IMG, Mangrich AS, de França AA, Le Saoût G, Cestari AR. The influence of in situpolymerized epoxidized A/F bisphenol-chitosan on features of oilwell cement slurry-Molecular-level analysis and long-term interaction of API fracturing fluid. J Appl Polym Sci 2014. [DOI: 10.1002/app.41044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Eunice F. S. Vieira
- Department of Chemistry/CCET; Laboratory of Materials and Calorimetry, Federal University of Sergipe; CEP 49100-000 São Cristóvão Sergipe Brazil
| | - Pablo F. Lima
- Department of Chemistry/CCET; Laboratory of Materials and Calorimetry, Federal University of Sergipe; CEP 49100-000 São Cristóvão Sergipe Brazil
| | - Ivory M. G. dos Santos
- Department of Chemistry/CCET; Laboratory of Materials and Calorimetry, Federal University of Sergipe; CEP 49100-000 São Cristóvão Sergipe Brazil
| | - Antonio S. Mangrich
- Department of Chemistry; Federal University of Paraná; CEP 81531-990 Curitiba Brazil
- National Institute of Science and Technology-Energy and Environment E&A; Salvador Bahia Brazil
| | - Amanda A. de França
- Department of Chemistry; Federal University of Paraná; CEP 81531-990 Curitiba Brazil
| | - Gwenn Le Saoût
- École des Mines d'Alès (EMA); Centre des Matériaux des Mines d'Alès (C2MA) 6; avenue de Clavières 30319 Alès Cedex France
| | - Antonio R. Cestari
- Department of Chemistry/CCET; Laboratory of Materials and Calorimetry, Federal University of Sergipe; CEP 49100-000 São Cristóvão Sergipe Brazil
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Nascimento LO, Goulart PP, Correa JL, Abrishamkar A, Da Silva JG, Mangrich AS, de França AA, Denadai ÂM. Molecular and supramolecular characterization of Ni(II)/losartan hydrophobic nanoprecipitate. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2014.05.080] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Mangrich AS, Doumer ME, Mallmannn AS, Wolf CR. Green Chemistry in Water Treatment: Use of Coagulant Derived fromAcacia mearnsiiTannin Extracts. ACTA ACUST UNITED AC 2014. [DOI: 10.5935/1984-6835.20140002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Araújo BR, Reis JOM, Rezende EIP, Mangrich AS, Wisniewski A, Dick DP, Romão LPC. Application of termite nest for adsorption of Cr(VI). J Environ Manage 2013; 129:216-223. [PMID: 23954388 DOI: 10.1016/j.jenvman.2013.07.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Revised: 06/26/2013] [Accepted: 07/06/2013] [Indexed: 06/02/2023]
Abstract
This work proposes the use of tree termite nest as an adsorbent for the reduction/removal of Cr(VI) present in aqueous solution. In laboratory experiments, adsorption of Cr(VI) was sensitive to pH in the range investigated (2-5), with maximum adsorption capacity achieved at pH 2 (3.70 ± 0.04 mg g(-1), representing 93.2% removal of Cr). The termite nest was characterized by off-line pyrolysis GC/MS (py-GC/MS), infrared spectroscopy (FTIR), and electron paramagnetic resonance spectroscopy (EPR). Pyrolysis of the adsorbent produced a complex mixture of aromatic compounds, including the guaiacyl and syringilic derivatives that are characteristic of lignocellulosic materials. Infrared spectroscopy revealed deprotonation of the carboxylic acid group of the biomass with increasing pH, which was associated with a decrease in the capacity for adsorption of Cr(VI). The EPR g-factor for the termite nest samples varied between 2.0037 and 2.0038, indicating the presence of organic free radicals that were responsible for the redox reaction. A second line with g-factor values of 1.9790, only observed for the samples after contact with Cr(VI) solutions at different pH values, was assigned to Cr(III)-Cr(III) exchange coupled pairs, which explained the capacity of the adsorbent to retain a large portion of the Cr(III) ions produced after reduction of Cr(VI) to Cr(III). Fixed-bed column experiments showed that the termite nest had a maximum adsorption capacity of 18.60 mg Cr g(-1), an adsorption efficiency varying between 60.8 and 97.4%, and a desorption efficiency varying between 54.5 and 91.4%, for three successive cycles. The adsorbent presented excellent performance in the removal of chromium under acidic conditions, with the advantage that it could be regenerated and reused.
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Affiliation(s)
- B R Araújo
- Departamento de Química, Universidade Federal de Sergipe, 49100-000 São Cristóvão, SE, Brazil
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Denadai ÂM, Da Silva JG, Guimarães PP, Gomes LBS, Mangrich AS, de Rezende EI, Daniel IM, Beraldo H, Sinisterra RD. Control of size in losartan/copper(II) coordination complex hydrophobic precipitate. Materials Science and Engineering: C 2013; 33:3916-22. [DOI: 10.1016/j.msec.2013.05.033] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2012] [Revised: 02/11/2013] [Accepted: 05/13/2013] [Indexed: 11/16/2022]
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Oliveira EC, Deflon E, Machado KD, Silva TG, Mangrich AS. Structural, vibrational and optical studies on an amorphous Se90P10 alloy produced by mechanical alloying. J Phys Condens Matter 2012; 24:115802. [PMID: 22353851 DOI: 10.1088/0953-8984/24/11/115802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We investigated some physicochemical properties of an amorphous Se(90)P(10) alloy produced by mechanical alloying through x-ray diffraction, Raman spectroscopy, optical absorption spectroscopy and EXAFS techniques. The total structure factor obtained from x-ray diffraction and the EXAFS χ(k) oscillations on the Se K edge were used in reverse Monte Carlo simulations to obtain structural information such as average coordination numbers and interatomic distances and the distribution of structural units present in the alloy. In addition, we also determined the vibrational modes and the optical band gap energy of the alloy.
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Affiliation(s)
- E C Oliveira
- Departamento de Física, Centro Politécnico, Universidade Federal do Paraná, 81531-990, Curitiba, PR, Brazil
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Osório REHMB, Peralta RA, Bortoluzzi AJ, de Almeida VR, Szpoganicz B, Fischer FL, Terenzi H, Mangrich AS, Mantovani KM, Ferreira DEC, Rocha WR, Haase W, Tomkowicz Z, Anjos AD, Neves A. Synthesis, Magnetostructural Correlation, and Catalytic Promiscuity of Unsymmetric Dinuclear Copper(II) Complexes: Models for Catechol Oxidases and Hydrolases. Inorg Chem 2012; 51:1569-89. [DOI: 10.1021/ic201876k] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | | | | | | | - Antonio S. Mangrich
- Departamento de
Química, Universidade Federal do Paraná, 81531-970 Curitiba, Paraná, Brazil
| | - Karen Mary Mantovani
- Departamento de
Química, Universidade Federal do Paraná, 81531-970 Curitiba, Paraná, Brazil
| | - Dalva E. C. Ferreira
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Campus Universitário
Pampulha, 31270-901 Pampulha, Belo Horizonte, Minas Gerais, Brazil
| | - Willian R. Rocha
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Campus Universitário
Pampulha, 31270-901 Pampulha, Belo Horizonte, Minas Gerais, Brazil
| | - Wolfgang Haase
- Institut für Physikalishe
Chemie, Technische Universität Darmstadt, Petersenstraße 20, D-64287-Darmstadt, Germany
| | - Zbigniew Tomkowicz
- Institut für Physikalishe
Chemie, Technische Universität Darmstadt, Petersenstraße 20, D-64287-Darmstadt, Germany
- Institute of Physics, Reymonta
4, Jagiellonian University, PL-30-059 Krakow,
Poland
| | - Ademir dos Anjos
- Universidade Estadual de Mato Grosso do Sul, 79950-000 Unidade Universitária
de Naviraí, Mato Grosso do Sul, Brazil
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Rezende EIPD, Mangrich AS, Mangoni AP, Scarpellini M, Casellato A, Fernández TL. Estudo espectroscópico de compósito obtido da reação no estado sólido entre um complexo mononuclear de vanádio(IV) e caulinita. QUIM NOVA 2012. [DOI: 10.1590/s0100-40422012000200005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Vieira IS, Zaia DAM, Balena SP, Mangrich AS, de Santana H. Spectroscopic investigation of the interaction of p-benzoquinone with casein in the solid state. Spectrochim Acta A Mol Biomol Spectrosc 2010; 75:769-772. [PMID: 20044305 DOI: 10.1016/j.saa.2009.11.052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2009] [Accepted: 11/20/2009] [Indexed: 05/28/2023]
Abstract
The reaction between p-benzoquinone (PBQ) and casein (protein) in the solid state was studied. After reaction with protein, the FT-IR spectra showed a new band at 1215 cm(-1), with an intense sign attributed for casein/PBQ product. An optimum amount of PBQ for determination of the product when mixed with casein was 100mg and a reaction time of 30 min. The product was stable for a period of 24h after the reacting by heating. The interaction of PBQ with casein was investigated by FT-IR, reflectance, Raman and EPR spectroscopies. The reaction between PBQ and casein in the solid state yields a radical species (p-benzosemiquinone) that it is stabilized by the presence of p-biphenolate and p-benzoquinone species in the solid state.
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Affiliation(s)
- Isadora S Vieira
- Departamento de Química, Universidade Estadual de Londrina, Cx P 6001, 86051-990 Londrina, PR, Brazil
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Martins LR, Souza ET, Fernandez TL, Souza BD, Rachinski S, Pinheiro CB, Faria RB, Casellato A, Machado SP, Mangrich AS, Scarpellini M. Binuclear CuII complexes as catalysts for hydrocarbon and catechol oxidation reactions with hydrogen peroxide and molecular oxygen. J BRAZIL CHEM SOC 2010. [DOI: 10.1590/s0103-50532010000700009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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25
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Romanowski SMDM, Machado SP, Friedermann GR, Mangrich AS, Hermann MDF, Lima HO, Nakagaki S. Synthesis, characterization, EPR spectroelectrochemistry studies and theoretical calculations of manganese(II) complexes with the ligands H3bpeten and H3bnbpeten. J BRAZIL CHEM SOC 2010. [DOI: 10.1590/s0103-50532010000500011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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26
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Rachinski S, Carubelli A, Mangoni AP, Mangrich AS. Pilhas de combustíveis microbianas utilizadas na produção de eletricidade a partir de rejeitos orgânicos: uma perspectiva de futuro. QUIM NOVA 2010. [DOI: 10.1590/s0100-40422010000800026] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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27
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Francisco AI, Vargas MD, Fragoso TP, Carneiro JWDM, Casellato A, Silva FDCD, Ferreira VF, Barbosa JP, Pessoa C, Costa-Lotufo LV, Marinho Filho JDB, Moraes MOD, Mangrich AS. Theoretical studies of the tautomerism in 3-(2-R-Phenylhydrazono)-naphthalene- 1,2,4-triones: synthesis of copper(II) complexes and studies of antibacterial and antitumor activities. J BRAZIL CHEM SOC 2010. [DOI: 10.1590/s0103-50532010000700017] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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28
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Machado KD, Sanchez DF, Maciel GA, Brunatto SF, Mangrich AS, Stolf SF. Vibrational, optical and structural studies of an amorphous Se(0.90)S(0.10) alloy produced by mechanical alloying. J Phys Condens Matter 2009; 21:195406. [PMID: 21825484 DOI: 10.1088/0953-8984/21/19/195406] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The local atomic order of an amorphous Se(0.90)S(0.10) alloy produced by mechanical alloying was studied by x-ray diffraction and extended x-ray absorption fine structure (EXAFS) data obtained at three temperatures, T = 300, 200 and 30 K. From the cumulant analysis of the EXAFS data, structural properties such as average interatomic distances, average coordination numbers, Debye-Waller factors and anharmonicity, given by the third cumulant, were obtained. The results found indicate that there is alloying at an atomic level, and Se-S pairs are more disordered and distorted than Se-Se ones due to the milling process.
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Affiliation(s)
- K D Machado
- Departamento de Física, Centro Politécnico, Universidade Federal do Paraná, 81531-990, Curitiba, PR, Brazil
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29
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Fernández TL, Souza ET, Visentin LC, Santos JV, Mangrich AS, Faria RB, Antunes O, Scarpellini M. A new oxo-vanadium complex employing an imidazole-rich tripodal ligand: A bioinspired bromide and hydrocarbon oxidation catalyst. J Inorg Biochem 2009; 103:474-9. [DOI: 10.1016/j.jinorgbio.2009.02.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2008] [Revised: 02/03/2009] [Accepted: 02/03/2009] [Indexed: 11/28/2022]
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Novotny EH, Hayes MHB, Madari BE, Bonagamba TJ, Azevedo ERD, Souza AAD, Song G, Nogueira CM, Mangrich AS. Lessons from the Terra Preta de Índios of the Amazon region for the utilisation of charcoal for soil amendment. J BRAZIL CHEM SOC 2009. [DOI: 10.1590/s0103-50532009000600002] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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31
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Mangrich AS, Silva LD, Pereira BF, Messerschmidt I. Proposal of an EPR based method for pollution level monitoring in mangrove sediments. J BRAZIL CHEM SOC 2009. [DOI: 10.1590/s0103-50532009000200014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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32
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Maia CMBF, Piccolo A, Mangrich AS. Molecular size distribution of compost-derived humates as a function of concentration and different counterions. Chemosphere 2008; 73:1162-1166. [PMID: 18778847 DOI: 10.1016/j.chemosphere.2008.07.069] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2008] [Revised: 07/14/2008] [Accepted: 07/29/2008] [Indexed: 05/26/2023]
Abstract
Conformational changes in the structures of humic acids (HA) extracted from compost with varying degrees of maturity were monitored by high performance size exclusion chromatography (HPSEC). The molecular size distribution of HA was compared in solutions containing sodium or ammonium counterions at pH 7 and pH 4.5. These findings indicate that the humates' molecular size depended not only on the nature of the counterions but also on their concentration in the solution. The physicochemical nature of sodium counterions determined smaller molecular sizes than those of the more hydrated ammonium counterions, at low concentrations of humates. Conversely, at higher humate concentrations, the more compact conformation of sodium humates produced larger molecular sizes than those of ammonium humates due to the aggregation of more hydrophobic surfaces in the sodium humates. Composting led to the degradation of labile microbial components with accumulation of hydrophobic constituents. This caused self-association of hydrophobic compounds into humic superstructures of larger molecular size over composting time. At lower pH, changes in conformational stability by the addition of acetic acid to humate solutions were explained by the supramolecular model of humified organic matter.
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Pérez-Rebolledo A, Teixeira LR, Batista AA, Mangrich AS, Aguirre G, Cerecetto H, González M, Hernández P, Ferreira AM, Speziali NL, Beraldo H. 4-Nitroacetophenone-derived thiosemicarbazones and their copper(II) complexes with significant in vitro anti-trypanosomal activity. Eur J Med Chem 2008; 43:939-48. [PMID: 17709156 DOI: 10.1016/j.ejmech.2007.06.020] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2007] [Revised: 06/20/2007] [Accepted: 06/22/2007] [Indexed: 10/23/2022]
Abstract
N(4)-methyl-4-nitroacetophenone thiosemicarbazone (H4NO(2)Ac4M, 1), N(4),N(4)-dimethyl-4-nitroacetophenone thiosemicarbazone (H4NO(2)Ac4DM, 2) and N(4)-piperidyl-4-nitroacetophenone thiosemicarbazone (H4NO(2)Ac4Pip, 3) and their copper(II) complexes [Cu(4NO(2)Ac4M)(2)] (4), [Cu(4NO(2)Ac4DM)(2)] (5) and [Cu(4NO(2)Ac4Pip)(2)] (6) were tested for their in vitro ability to inhibit the growth of Trypanosoma cruzi epimastigote forms. H4NO(2)Ac4DM (2), [Cu(4NO(2)Ac4M)(2)] (4) and [Cu(4NO(2)Ac4DM)(2)] (5) proved to be as active as the clinical reference drugs nifurtimox and benznidazol. Taking into consideration the serious side effects and the poor efficacy of the reference drugs, as well as the appearance of resistance during treatment, the studied compounds could constitute a new class of anti-trypanosomal drug candidates.
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Affiliation(s)
- Anayive Pérez-Rebolledo
- Departamento de Química, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil
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Mangrich AS, Viertler H, Vieira PC. A inserção internacional da Sociedade Brasileira de Química. QUIM NOVA 2007. [DOI: 10.1590/s0100-40422007000600013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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35
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Pinto AC, Mangrich AS, Andrade JBD, Pardini VL. Editorial. QUIM NOVA 2007. [DOI: 10.1590/s0100-40422007000600001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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36
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Coelho TC, Laus R, Mangrich AS, de Fávere VT, Laranjeira MC. Effect of heparin coating on epichlorohydrin cross-linked chitosan microspheres on the adsorption of copper (II) ions. REACT FUNCT POLYM 2007. [DOI: 10.1016/j.reactfunctpolym.2007.02.009] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Silva LA, Andrade JBD, Mangrich AS. Use of Cu2+ as a metal ion probe for the EPR study of metal complexation sites in the double sulfite CuI 2SO3.CdII SO3 .2H2O. J BRAZIL CHEM SOC 2007. [DOI: 10.1590/s0103-50532007000300018] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Scarpellini M, Casellato A, Bortoluzzi AJ, Vencato I, Mangrich AS, Neves A, Machado SP. EPR and semi-empirical studies as tools to assign the geometric structures of FeIII isomer models for transferrins. J BRAZIL CHEM SOC 2006. [DOI: 10.1590/s0103-50532006000800020] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Anjos AD, Bortoluzzi AJ, Caro MSB, Peralta RA, Friedermann GR, Mangrich AS, Neves A. New phenoxyl radical complexes of manganese, gallium, indium and iron based on an H2bbpen ligand derivative. J BRAZIL CHEM SOC 2006. [DOI: 10.1590/s0103-50532006000800009] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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40
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Mendes IC, Moreira JP, Speziali NL, Mangrich AS, Takahashi JA, Beraldo H. N(4)-tolyl-2-benzoylpyridine thiosemicarbazones and their copper(II) complexes with significant antifungal activity: crystal structure of N(4)-para-tolyl-2-benzoylpyridine thiosemicarbazone. J BRAZIL CHEM SOC 2006. [DOI: 10.1590/s0103-50532006000800013] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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41
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Mercê ALR, Lopes PP, Mangrich AS, Levy NM. Molybdenum (VI) binded to humic and nitrohumic acid models in aqueous solutions. Salicylic, 3-nitrosalicylic, 5-nitrosalicylic and 3,5 dinitrosalicylic acids: part 2. J BRAZIL CHEM SOC 2006. [DOI: 10.1590/s0103-50532006000300008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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43
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Rey NA, Santos KCD, Menezes MÂBC, Mangrich AS, Pereira-Maia EC. Two different modes for copper(II) ion coordination to quinine-type ligands. J BRAZIL CHEM SOC 2006. [DOI: 10.1590/s0103-50532006000300010] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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44
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Peralta RA, Neves A, Bortoluzzi AJ, Dos Anjos A, Xavier FR, Szpoganicz B, Terenzi H, de Oliveira MCB, Castellano E, Friedermann GR, Mangrich AS, Novak MA. New unsymmetric dinuclear CuIICuII complexes and their relevance to copper(II) containing metalloenzymes and DNA cleavage. J Inorg Biochem 2006; 100:992-1004. [PMID: 16563512 DOI: 10.1016/j.jinorgbio.2006.01.041] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2005] [Revised: 01/18/2006] [Accepted: 01/24/2006] [Indexed: 11/17/2022]
Abstract
The new homodinuclear complexes, [Cu(2)(II)(HLdtb)(mu-OCH(3))](ClO(4))(2) (1) and [Cu(2)(II)(Ldtb)(mu-OCH(3))](BPh(4)) (2), with the unsymmetrical N(5)O(2) donor ligand (H(2)Ldtb) - {2-[N,N-Bis(2-pyridylmethyl)aminomethyl]-6-[N',N'-(3,5-di-tert-butylbenzyl-2-hydroxy)(2-pyridylmethyl)]aminomethyl}-4-methylphenol have been synthesized and characterized in the solid state by X-ray crystallography. In both cases the structure reveals that the complexes have a common {Cu(II)(mu-phenoxo)(mu-OCH(3))Cu(II)} structural unit. Magnetic susceptibility studies of 1 and 2 reveal J values of -38.3 cm(-1) and -2.02 cm(-1), respectively, and that the degree of antiferromagnetic coupling is strongly dependent on the coordination geometries of the copper centers within the dinuclear {Cu(II)(mu-OCH(3))(mu-phenolate)Cu(II)} structural unit. Solution studies in dichloromethane, using UV-Visible spectroscopy and electrochemistry, indicate that under these experimental conditions the first coordination spheres of the Cu(II) centers are maintained as observed in the solid state structures, and that both forms can be brought into equilibrium ([Cu(2)(HLdtb)(mu-OCH(3))](2+)=[Cu(2)(Ldtb)(mu-OCH(3))](+)+H(+)) by adjusting the pH with Et(3)N (Ldtb(2-) is the deprotonated form of the ligand). On the other hand, potentiometric titration studies of 1 in an ethanol/water mixture (70:30 V/V; I=0.1M KCl) show three titrable protons, indicating the dissociation of the bridging CH(3)O(-) group.The catecholase activity of 1 and 2 in methanol/water buffer (30:1 V/V) demonstrates that the deprotonated form is the active species in the oxidation of 3,5-di-tert-butylcatechol and that the reaction follows Michaelis-Menten behavior with k(cat)=5.33 x 10(-3)s(-1) and K(M)=3.96 x 10(-3)M. Interestingly, 2 can be electrochemically oxidized with E(1/2)=0.27 V vs.Fc(+)/Fc (Fc(+)/Fc is the redox pair ferrocinium/ferrocene), a redox potential which is believed to be related to the formation of a phenoxyl radical. Since these complexes are redox active species, we analyzed their activity toward the nucleic acid DNA, a macromolecule prone to oxidative damage. Interestingly these complexes promoted DNA cleavage following an oxygen dependent pathway.
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Affiliation(s)
- Rosely A Peralta
- Departamento de Química - LABINC - Universidade Federal de Santa Catarina, Campus Universitário - Trindade, 88040-900 Florianópolis, SC, Brazil
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45
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Mercê ALR, Greboge C, Mendes G, Mangrich AS. Molybdenum (VI) binded to humic and nitrohumic acid models in aqueous solutions: phthalic, 3- and 4-nitrophthalic acids, catechol and 4-nitrocathecol, part 1. J BRAZIL CHEM SOC 2005. [DOI: 10.1590/s0103-50532005000100006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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47
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Romanowski SMDM, Tormena F, Santos VAD, Hermann MDF, Mangrich AS. Solution studies of copper(II) complexes as a contribution to the study of the active site of galactose oxidase. J BRAZIL CHEM SOC 2004. [DOI: 10.1590/s0103-50532004000600017] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Budziak CR, Maia CMBF, Mangrich AS. Transformações químicas da matéria orgânica durante a compostagem de resíduos da indústria madeireira. QUIM NOVA 2004. [DOI: 10.1590/s0100-40422004000300007] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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49
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Luiz JB, Andrade FMD, Sá ELD, Friedermann GR, Mangrich AS, Barclay JE, Evans DJ, Hasegawa T, Nunes FS. 2-Mercaptobenzoxazole pentacyanoferrate(II/III) complexes: UV-Visible, Mössbauer, electron paramagnetic resonance, electrochemistry and molecular modeling. J BRAZIL CHEM SOC 2004. [DOI: 10.1590/s0103-50532004000100003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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50
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Reis DM, Nunes GG, Sá EL, Friedermann GR, Mangrich AS, Evans DJ, Hitchcock PB, Leigh GJ, Soares JF. Iron(iii) and titanium(iv) oxoalkoxide chemistry: synthetic, structural, magnetochemical and spectroscopic studies of [Ti3(μ3-OPri)2(μ-OPri)3(OPri)6][FeCl4] and [Fe5(μ5-O)(μ-OPri)8Cl5]. NEW J CHEM 2004. [DOI: 10.1039/b403899a] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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