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Correa JDS, Primo JDO, Balaba N, Pratsch C, Werner S, Toma HE, Anaissi FJ, Wattiez R, Zanette CM, Onderwater RCA, Bittencourt C. Copper(II) and Cobalt(II) Complexes Based on Abietate Ligands from Pinus Resin: Synthesis, Characterization and Their Antibacterial and Antiviral Activity against SARS-CoV-2. Nanomaterials (Basel) 2023; 13:1202. [PMID: 37049296 PMCID: PMC10096983 DOI: 10.3390/nano13071202] [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] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/22/2023] [Accepted: 03/24/2023] [Indexed: 06/19/2023]
Abstract
Co-abietate and Cu-abietate complexes were obtained by a low-cost and eco-friendly route. The synthesis process used Pinus elliottii resin and an aqueous solution of CuSO4/CoSO4 at a mild temperature (80 °C) without organic solvents. The obtained complexes are functional pigments for commercial architectural paints with antipathogenic activity. The pigments were characterized by Fourier-transform infrared spectroscopy (FTIR), mass spectrometry (MS), thermogravimetry (TG), near-edge X-ray absorption fine structure (NEXAFS), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and colorimetric analysis. In addition, the antibacterial efficiency was evaluated using the minimum inhibitory concentration (MIC) test, and the antiviral tests followed an adaptation of the ISO 21702:2019 guideline. Finally, virus inactivation was measured using the RT-PCR protocol using 10% (w/w) of abietate complex in commercial white paint. The Co-abietate and Cu-abietate showed inactivation of >4 log against SARS-CoV-2 and a MIC value of 4.50 µg·mL-1 against both bacteria Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli). The results suggest that the obtained Co-abietate and Cu-abietate complexes could be applied as pigments in architectural paints for healthcare centers, homes, and public places.
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Affiliation(s)
- Jamille de S. Correa
- Departament of Chemistry, Universidade Estadual do Centro-Oeste, UNICENTRO, Alameda Elio Antonio Dalla Vecchia, 838, Guarapuava 85040-167, PR, Brazil
| | - Julia de O. Primo
- Departament of Chemistry, Universidade Estadual do Centro-Oeste, UNICENTRO, Alameda Elio Antonio Dalla Vecchia, 838, Guarapuava 85040-167, PR, Brazil
| | - Nayara Balaba
- Departament of Chemistry, Universidade Estadual do Centro-Oeste, UNICENTRO, Alameda Elio Antonio Dalla Vecchia, 838, Guarapuava 85040-167, PR, Brazil
| | - Christoph Pratsch
- Department X-ray Microscopy, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Str. 15, 12489 Berlin, Germany
| | - Stephan Werner
- Department X-ray Microscopy, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Str. 15, 12489 Berlin, Germany
| | - Henrique E. Toma
- Institute of Chemistry, University of São Paulo, São Paulo 05508-000, SP, Brazil
| | - Fauze J. Anaissi
- Departament of Chemistry, Universidade Estadual do Centro-Oeste, UNICENTRO, Alameda Elio Antonio Dalla Vecchia, 838, Guarapuava 85040-167, PR, Brazil
| | - Ruddy Wattiez
- Department of Chemistry, University of Mons, Place du Parc 23, 7000 Mons, Belgium;
| | - Cristina M. Zanette
- Department of Food Engineering, Universidade Estadual do Centro-Oeste, UNICENTRO, Alameda Elio Antonio Dalla Vecchia, 838, Guarapuava 85040-167, PR, Brazil
| | | | - Carla Bittencourt
- Department of Chemistry, University of Mons, Place du Parc 23, 7000 Mons, Belgium;
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Schons AB, Correa JS, Appelt P, Meneguzzi D, Cunha MAA, Bittencourt C, Toma HE, Anaissi FJ. Eco-Friendly Synthesis of an Oxovanadium(IV)- bis(abietate) Complex with Antimicrobial Action. Molecules 2022; 27:molecules27196679. [PMID: 36235216 PMCID: PMC9573124 DOI: 10.3390/molecules27196679] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 10/03/2022] [Accepted: 10/06/2022] [Indexed: 11/07/2022] Open
Abstract
The search for less expensive and viable products is always one of the challenges for research development. Commonly, the synthesis of coordination compounds involves expensive ligands, through expensive and low-yield routes, in addition to generating toxic and unusable residues. In this work, the organic ligand used is derived from the resin of a reforestation tree, Pinus elliottii var. elliottii. The synthesis method used Pinus resin and an aqueous solution of vanadium(III) chloride at a temperature of 80 °C. The procedure does not involve organic solvents and does not generate toxic residues, thus imparting the complex formation reaction a green chemistry character. The synthesis resulted in an unprecedented oxovanadium(IV)-bis(abietate) complex, which was characterized by mass spectrometry (MS), chemical analysis (CHN), vibrational (FTIR) and electronic spectra (VISIBLE), X-ray diffraction (XRD), and thermal analysis (TG/DTA). Colorimetric studies were performed according to the CIELAB color space. The structural formula found, consisted of a complex containing two abietate ligands, [VO(C20H29O2)2]. The VO(IV)-bis(abietate) complex was applied against microorganisms and showed promising results in antibacterial and antifungal activity. The best result of inhibitory action was against the strains of Gram-positive bacteria S. aureus and L. monocytogenes, with minimum inhibitory concentration (MIC) values of 62.5 and 125 μmol L−1, respectively. For Gram-negative strains the results were 500 μmol L−1 for E. coli; and 1000 μmol L−1 for Salmonella enterica Typhimurium. Antifungal activity was performed against Candida albicans, where the MIC was 15.62 μmol L−1, and for C. tropicalis it was 62.5 μmol L−1. According to the MFC analysis, the complex presented, in addition to the fungistatic action, a fungicidal action, as there was no growth of fungi on the plates tested. The results found for the tests demonstrate that the VO(IV)-bis(abietate) complex has great potential as an antimicrobial and mainly antifungal agent. In this way, the pigmented ink with antimicrobial activity could be used in environments with a potential risk of contamination, preventing the spread of microorganisms harmful to health.
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Affiliation(s)
- Aline B. Schons
- Department of Chemistry, Universidade Estadual do Centro-Oeste, UNICENTRO, Alameda Elio Antonio Dalla Vecchia, 838, Guarapuava 85040-167, PR, Brazil
| | - Jamille S. Correa
- Department of Chemistry, Universidade Estadual do Centro-Oeste, UNICENTRO, Alameda Elio Antonio Dalla Vecchia, 838, Guarapuava 85040-167, PR, Brazil
| | - Patricia Appelt
- Department of Chemistry, Universidade Estadual do Centro-Oeste, UNICENTRO, Alameda Elio Antonio Dalla Vecchia, 838, Guarapuava 85040-167, PR, Brazil
| | - Daiane Meneguzzi
- Department of Chemistry, Universidade Tecnológica Federal do Paraná, UTFPR, Via do Conhecimento, KM 01, Fraron, Pato Branco 85503-390, PR, Brazil
| | - Mário A. A. Cunha
- Department of Chemistry, Universidade Tecnológica Federal do Paraná, UTFPR, Via do Conhecimento, KM 01, Fraron, Pato Branco 85503-390, PR, Brazil
| | - Carla Bittencourt
- Department of Chemistry, University of Mons, Place du Parc 23, 7000 Mons, Belgium
| | - Henrique E. Toma
- Institute of Chemistry, University of Sao Paulo, São Paulo 05508-000, SP, Brazil
| | - Fauze J. Anaissi
- Department of Chemistry, Universidade Estadual do Centro-Oeste, UNICENTRO, Alameda Elio Antonio Dalla Vecchia, 838, Guarapuava 85040-167, PR, Brazil
- Correspondence:
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Correa JS, Primo JO, Bittencourt C, Horsth DFL, Radovanovic E, Silveira-Jr AT, Toma HE, Zanette CM, Anaissi FJ. Experimental data for green synthesis of Zn-abietate complex from natural resin. Data Brief 2022; 40:107776. [PMID: 35028348 PMCID: PMC8741433 DOI: 10.1016/j.dib.2021.107776] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Revised: 12/26/2021] [Accepted: 12/28/2021] [Indexed: 11/30/2022] Open
Abstract
This data article is associated with the work “Ecofriendly synthesis of Zn-abietate complex derived from Pinus elliottii resin and its application as an antibacterial pigment against S. aureus and E. coli”. The characterization data of the Zn-abietate complex obtained from Pinus elliottii resin and their reactional intermediary (Na-abietate) are reported. The Na-abietate was prepared with purified Pinus resin and sodium hydroxide (≥ 99%) in a stoichiometric ratio of 1:1. For the Zn-abietate synthesis was used ZnSO4 and Na-abietate solutions were at mild temperature and stirring without using organic solvents to ensuring the green character of the synthesis. Spectroscopic and structural characterization was consistent with an octahedral complex involving three carboxylate ligands per metal ion. X-ray photoelectron spectroscopy (XPS) analysis of the Na-abietate salt confirms the presence of carbonyl groups, carbon-oxygen atoms simple bonds (O-C/O=C), and carboxylate groups oxygen atoms (O-C=O). Analysis of the Zn LMM Auger, for the Zn-abietate complex, indicates the presence of zinc atoms with oxidation state Zn2+, this is supported by the distance between Zn 2p3/2 and 1p1/2 in the XPS spectrum. Together, these data will be useful for the structural representation of the samples.
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Affiliation(s)
- Jamille S Correa
- Departament of Chemistry, Universidade Estadual do Centro-Oeste, UNICENTRO, Alameda Elio Antonio Dalla Vecchia, 838, Guarapuava, PR 85040-167, Brazil
| | - Júlia O Primo
- Departament of Chemistry, Universidade Estadual do Centro-Oeste, UNICENTRO, Alameda Elio Antonio Dalla Vecchia, 838, Guarapuava, PR 85040-167, Brazil
| | - Carla Bittencourt
- Department of Chemistry, University of Mons, Place du Parc 23, Mons 7000, Belgium
| | - Dienifer F L Horsth
- Departament of Chemistry, Universidade Estadual do Centro-Oeste, UNICENTRO, Alameda Elio Antonio Dalla Vecchia, 838, Guarapuava, PR 85040-167, Brazil
| | - Eduardo Radovanovic
- Department of Chemistry, Universidade Estadual de Maringá, UEM, Av. Colombo 5790, Maringá, PR 87020-900, Brazil
| | - Alceu T Silveira-Jr
- Institute of Chemistry, University of Sao Paulo, São Paulo, SP 05508.000, Brazil
| | - Henrique E Toma
- Institute of Chemistry, University of Sao Paulo, São Paulo, SP 05508.000, Brazil
| | - Cristina M Zanette
- Departament of Chemistry, Universidade Estadual do Centro-Oeste, UNICENTRO, Alameda Elio Antonio Dalla Vecchia, 838, Guarapuava, PR 85040-167, Brazil
| | - Fauze J Anaissi
- Departament of Chemistry, Universidade Estadual do Centro-Oeste, UNICENTRO, Alameda Elio Antonio Dalla Vecchia, 838, Guarapuava, PR 85040-167, Brazil
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Brandão BBNS, Sihn LM, de Melo FM, Toma HE. A luminescent boron difluoride derivative of the YELLOW 101 dye. Spectrochim Acta A Mol Biomol Spectrosc 2021; 261:119997. [PMID: 34090097 DOI: 10.1016/j.saa.2021.119997] [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: 03/30/2021] [Revised: 05/19/2021] [Accepted: 05/21/2021] [Indexed: 06/12/2023]
Abstract
Inspired on the outstanding behavior of the BODIPY dye, a new fluorescent boron fluoride derivative of the classical 2,2'-dihydroxy-1,1'-naphtalazine or YELLOW 101 dye has been synthesized and investigated in this work. Analogously to YELLOW 101 (λemission = 510 nm), the new species, here denoted BYELLOW 101, exhibits strong fluorescence around 570 and 535 nm in the solid form and in organic solvents, respectively. The observed red shift of the luminescence emission can be explored in the superparamagnetic fluorescent materials employed in MPI (magnetic particle inspection) technology, decreasing the influence of the FRET mechanism, - a critical limitation in this type of system. BYELLOW 101 is stable in solid form, but in organic solvents, it hydrolyses very slowly regenerating the initial dye, keeping the fluorescence emission but exhibiting a small blue shift along the time.
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Affiliation(s)
- Bruno B N S Brandão
- Instituto de Química, Universidade de São Paulo, CEP 05508-000 São Paulo, Brazil
| | - Luca M Sihn
- Instituto de Química, Universidade de São Paulo, CEP 05508-000 São Paulo, Brazil
| | - Fernando M de Melo
- Instituto de Química, Universidade de São Paulo, CEP 05508-000 São Paulo, Brazil
| | - Henrique E Toma
- Instituto de Química, Universidade de São Paulo, CEP 05508-000 São Paulo, Brazil.
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Quartarolli LF, Silveira AT, Toma HE. Overcoming lithium analysis difficulties with a simple colorimetric/spectrophotometric method. Anal Methods 2021; 13:3627-3631. [PMID: 34378548 DOI: 10.1039/d1ay00937k] [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] [Indexed: 06/13/2023]
Abstract
The analytical determination of lithium ions is usually performed by atomic absorption and X-ray fluorescence methods. Chemical analysis based on polyfluoroporphyrin chromogenic methods is also being employed, especially for biological samples. However, all existing methods are expensive and not suitable for routine work or field assays. The alternative method proposed here is based on the formation of a LiKFe(IO6) compound which is converted into a tris(1,10-phenanthroline)iron(ii) complex and monitored by spectrophotometric or colorimetric methods, the latter using a smartphone app. Under similar conditions, these two methods proved superior to the X-ray fluorescence method. A one pot analysis of lithium ions is also described, using an Eppendorf microtube previously modified for performing reaction, filtration and detection. This method is simple and very convenient for didactic and field assays.
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Menegatti de Melo F, Mattioni JV, Dias F, Fu Y, Toma HE. Solvophobic-controlled synthesis of smart magneto-fluorescent nanostructures for real-time inspection of metallic fractures. Nanoscale Adv 2021; 3:3593-3604. [PMID: 36133726 PMCID: PMC9419086 DOI: 10.1039/d1na00149c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Accepted: 04/27/2021] [Indexed: 06/16/2023]
Abstract
The production of materials that contain more than one functional constituent, the so-called multifunctional materials, is quite relevant in advanced technology. By acting as building blocks, nanoparticles can be suitably explored for generating higher-order multifunctional structures. In this regard, herein, a special clustered magneto-fluorescent superstructure has been developed for non-destructive detection of flaws and shallow subsurface discontinuities in industrial ferromagnetic materials. The strategy consists of the solvophobic-controlled assembly of organic-based maghemite cores and water-based II-VI quantum dots, in the presence of hexadecyltrimethyl-ammonium bromide, CTAB, as a compatibilizer agent. This composite exhibited a high magnetic response (σ max = 66 emu g-1) and uniform size, in addition to tunable optical properties (QY = 78%). The strategy of utilizing nanoparticles as magneto-fluorescent nanoprobes to identify tiny slits represents a great advance, for improving the capability of precisely revealing the fracture boundary locations by visual real-time inspection. The nanoscale probes exhibit a low signal-to-noise ratio and a higher competitive performance in relation to the existing micrometric detection systems.
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Affiliation(s)
- Fernando Menegatti de Melo
- Supramolecular Nanotech Laboratory, Institute of Chemistry, University of São Paulo Avenida Professor Lineu Prestes, 748 05508000 São Paulo Brazil
- Metal-Chek do Brasil Indústria e Comércio, Research & Development Department Rua das Indústrias, 135 12926674 Bragança Paulista Brazil
| | - João V Mattioni
- Supramolecular Nanotech Laboratory, Institute of Chemistry, University of São Paulo Avenida Professor Lineu Prestes, 748 05508000 São Paulo Brazil
| | - Fernando Dias
- Metal-Chek do Brasil Indústria e Comércio, Research & Development Department Rua das Indústrias, 135 12926674 Bragança Paulista Brazil
| | - Ying Fu
- School of Information Technology, Halmstad University SE-30118 Halmstad Sweden
| | - Henrique E Toma
- Supramolecular Nanotech Laboratory, Institute of Chemistry, University of São Paulo Avenida Professor Lineu Prestes, 748 05508000 São Paulo Brazil
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de O Pereira ML, de Souza Paiva R, Vasconcelos TL, Oliveira AG, Oliveira Salles M, Toma HE, Grasseschi D. Photoinduced electron transfer dynamics of AuNPs and Au@PdNPs supported on graphene oxide probed by dark-field hyperspectral microscopy. Dalton Trans 2020; 49:16296-16304. [PMID: 32412563 DOI: 10.1039/d0dt01018a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The time scale for interfacial photoinduced electron transfer (PeT) in plasmonic nanoparticles is not well established and the details are still under debate. This has renewed the interest in studying the electron transfer effect from both experimental and theoretical points of view. We present a quantitative analysis of PeT in single spherical gold (Au) and gold@palladium core@shell (Au@Pd) nanoparticles supported on reduced graphene oxide (RGO) using dark-field hyperspectral microscopy (DFHM) and electrochemical impedance spectroscopy (EIS). By studying the plasmon bandwidth in the scattering spectra of single particles and by correlating it to the plasmon damping processes we showed that PeT occurs from the AuNPs to RGO in a 10 fs time scale with a quantum efficiency of 35%. The introduction of a Pd shell on the AuNPs decreases the PeT time, with transfer occurring in as little as 1.7 fs with quantum yield higher than 74%. Furthermore, EIS showed a smaller resistance for PeT on RGO/Au@PdNPs under green light illumination. Our results can improve the understanding of the chemical interface damping process due to PeT in plasmonic nanomaterials and can enable the design of more efficient plasmon enhanced photocatalysts.
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Affiliation(s)
- Maria Luiza de O Pereira
- Instituto de Química, Universidade Federal do Rio de Janeiro (UFRJ), 21941-909, Rio de Janeiro, Brasil.
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Cesca EC, Hoffmeister DM, Naidek KP, Novo JBM, Serbena JP, Hümmelgen IA, Westphal E, Araki K, Toma HE, Winnischofer H. 1,3,4-Oxadiazole based ruthenium amphiphile for Langmuir-Blodgett films and photo-responsive logic gate construction. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136350] [Citation(s) in RCA: 2] [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: 01/06/2023]
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Aguirre-Araque JS, Guimaraes RR, Toma HE. Chemistry of ternary monocarboxyterpyridine-bipyridine-trimercaptotriazine ruthenium complexes and application in dye sensitized solar cells. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114513] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Rocha JC, Sihn LM, Uchiyama MK, Ribeiro MA, Franco MP, Braga AAC, Silveira AT, Toma HE. On the Amazing Reactivity of the Ranelate Ion: New Applications of an Old Antiosporotic Drug. ChemistrySelect 2019. [DOI: 10.1002/slct.201904149] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Julio C. Rocha
- Department of chemistryInstitute of ChemistryUniv. São Paulo 05508-000 São Paulo Brazil
| | - Luca M. Sihn
- Department of chemistryInstitute of ChemistryUniv. São Paulo 05508-000 São Paulo Brazil
| | - Mayara K. Uchiyama
- Department of chemistryInstitute of ChemistryUniv. São Paulo 05508-000 São Paulo Brazil
| | | | - Maurício P. Franco
- Department of chemistryInstitute of ChemistryUniv. São Paulo 05508-000 São Paulo Brazil
| | - Ataualpa A. C. Braga
- Department of chemistryInstitute of ChemistryUniv. São Paulo 05508-000 São Paulo Brazil
| | - Alceu T. Silveira
- Department of chemistryInstitute of ChemistryUniv. São Paulo 05508-000 São Paulo Brazil
| | - Henrique E. Toma
- Department of chemistryInstitute of ChemistryUniv. São Paulo 05508-000 São Paulo Brazil
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Shinohara JS, Grasseschi D, Almeida SN, Toma HE. Exploring the metallochromic behavior of pentacyanidoferrates in visual, electronic and Raman spot tests. AN ACAD BRAS CIENC 2019; 91:e20180315. [PMID: 31038536 DOI: 10.1590/0001-3765201920180315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 06/20/2018] [Indexed: 11/22/2022] Open
Abstract
Pentacyanidoferrate(II) complexes of aromatic N-heterocycles, such as 4-cyanopyridine, exhibit characteristic colors and strong metallochromism associated with the donor-acceptor interactions of the metal ions with the cyanide ligands. In the presence of transition metal ions insoluble polymeric complexes are formed, displaying bright yellow, red, brown and green colors with zinc(II), nickel(II), copper(II) and iron(III) ions, respectively. Such metallochromic response is better observed on filter paper, allowing applications in analytical spot tests. The effects can be explored visually and probed by means of modern instrumental facilities, including spectrophotometric and resonance Raman techniques. In this way, by using the cyanopyridinepentacyanidoferrates, the Prussian Blue test for ferric ions can be extended to the entire row of transition metal elements, providing a new and modern insight of such classical Feigl's spot tests.
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Affiliation(s)
- Jorge S Shinohara
- Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000 São Paulo, SP, Brazil
| | - Daniel Grasseschi
- Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000 São Paulo, SP, Brazil
| | - Sabrina N Almeida
- Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000 São Paulo, SP, Brazil
| | - Henrique E Toma
- Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000 São Paulo, SP, Brazil
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Aguirre-Araque JS, Gonçalves JM, Nakamura M, Rossini PO, Angnes L, Araki K, Toma HE. GO composite encompassing a tetraruthenated cobalt porphyrin-Ni coordination polymer and its behavior as isoniazid BIA sensor. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.01.097] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Toma HE, Nikolaou S. Self-Assembly of a Supramolecular Cyclic Polymer Containing Pyrazine Bridged Trinuclear μ-Oxo-Ruthenium-Acetate Clusters. Journal of Chemical Research 2019. [DOI: 10.3184/030823400103167714] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The self-assembly of a novel supramolecular cyclic polymer species of general formula [Ru3O(CH3COO)6(CO)(pz)]6 has been achieved, by starting from μ-oxoruthenium cluster units in the presence of bridging pyrazine (pz) ligands.
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Affiliation(s)
- Henrique E. Toma
- Instituto de Química, Universidade de São Paulo, Caixa Postal 26077, CEP 05513-970, São Paulo, SP, Brazil
| | - Sofia Nikolaou
- Instituto de Química, Universidade de São Paulo, Caixa Postal 26077, CEP 05513-970, São Paulo, SP, Brazil
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Matias TA, Rein FN, Rocha RC, Formiga ALB, Toma HE, Araki K. Effects of a strong π-accepting ancillary ligand on the water oxidation activity of weakly coupled binuclear ruthenium catalysts. Dalton Trans 2019; 48:3009-3017. [PMID: 30747931 DOI: 10.1039/c8dt04963g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Significant differences were found in the proton-coupled redox chemistry and catalytic behavior of the binuclear [{Ru(H2O)(bpz)}2(tpy2ph)](PF6)4 complex [bpz = 2,2'-bipyrazine; tpy2ph = 1,3-bis(4'-2,2':6',2''-terpyridin-4-yl)benzene] as compared with the structurally analogous derivative with 2,2'-bipyridine (bpy) instead of bpz. The differences were assigned to the stronger π-accepting character of bpz relative to bpy as the ancillary ligand. The expectation of a positive shift for the Ru-centered redox potentials was confirmed for the lower oxidation state species, but that trend was reversed in the formation of the high-valence catalytic active species as shown by a negative shift of 0.14 V for the potential of the [RuIV/V[double bond, length as m-dash]O] process. Moreover, DFT calculations indicated a significant decrease of about 15% on the spin density and oxyl character of the [RuV[double bond, length as m-dash]O]3+ fragment. The significantly lower kcat(O2) for the bpz system was attributed to these combined electronic effects.
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Affiliation(s)
- Tiago A Matias
- Department of Chemistry, Institute of Chemistry, University of São Paulo, Av. Lineu Prestes 748, São Paulo, SP 05508-000, Brazil.
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Franciscato DS, Matias TA, Shinohara J, Gonçalves JM, Coelho NP, Fernandes CS, Basso EA, Nakatani HS, Araki K, Toma HE, de Souza VR. Thiosemicarbazone@Gold nanoparticle hybrid as selective SERS substrate for Hg 2+ ions. Spectrochim Acta A Mol Biomol Spectrosc 2018; 204:174-179. [PMID: 29933152 DOI: 10.1016/j.saa.2018.06.038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 05/25/2018] [Accepted: 06/11/2018] [Indexed: 06/08/2023]
Abstract
The Raman spectral profile of p-methylcarbohydrazonethioamide (MCHT) is completely changed due to strong SERS effects upon bonding onto gold nanoparticles surface, but some vibrational modes are further enhanced in the presence of Hg(II) ions. The lack of SERS response for most common metal ions indicates that the coordinating groups are interacting with the gold nanoparticles surface and not available for binding metal ions in solution, except for mercury ions. The selective enhancement of some vibrational modes is consistent with significant conformational changes upon binding of Hg(II) ion onto the AuNP@MCHT hybrid, as confirmed by TEM/EDS measurements, demonstrating its potentiality as a highly selective and sensitive SERS substrate.
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Affiliation(s)
- Douglas S Franciscato
- Department of Chemistry, State University of Maringá, Av. Colombo 5790, CEP 87020-900 Maringá, PR, Brazil
| | - Tiago A Matias
- Department of Chemistry, Institute of Chemistry, University of Sao Paulo, Av. Lineu Prestes 748, CEP 05508-000 Sao Paulo, SP, Brazil
| | - Jorge Shinohara
- Department of Chemistry, Institute of Chemistry, University of Sao Paulo, Av. Lineu Prestes 748, CEP 05508-000 Sao Paulo, SP, Brazil
| | - Josué M Gonçalves
- Department of Chemistry, Institute of Chemistry, University of Sao Paulo, Av. Lineu Prestes 748, CEP 05508-000 Sao Paulo, SP, Brazil
| | - Narcimário P Coelho
- Instituto Federal de Mato Grosso do Sul, Rodovia MS-473, Km 23, Fazenda Santa Bárbara, CEP 79750-000 Nova Andradina, MS, Brazil
| | - Cleverton S Fernandes
- Department of Chemistry, State University of Maringá, Av. Colombo 5790, CEP 87020-900 Maringá, PR, Brazil
| | - Ernani A Basso
- Department of Chemistry, State University of Maringá, Av. Colombo 5790, CEP 87020-900 Maringá, PR, Brazil
| | - Helena S Nakatani
- Department of Chemistry, State University of Maringá, Av. Colombo 5790, CEP 87020-900 Maringá, PR, Brazil
| | - Koiti Araki
- Department of Chemistry, Institute of Chemistry, University of Sao Paulo, Av. Lineu Prestes 748, CEP 05508-000 Sao Paulo, SP, Brazil
| | - Henrique E Toma
- Department of Chemistry, Institute of Chemistry, University of Sao Paulo, Av. Lineu Prestes 748, CEP 05508-000 Sao Paulo, SP, Brazil
| | - Vagner R de Souza
- Department of Chemistry, State University of Maringá, Av. Colombo 5790, CEP 87020-900 Maringá, PR, Brazil.
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Aguirre-Araque JS, Rocha RC, Toma HE. Electrostatic bending and outer-sphere intervalence transfer in a flexible ligand-bridged ruthenium(III)-iron(II) complex. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1493725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
| | | | - Henrique E. Toma
- Instituto de Química, Universidade de São Paulo, São Paulo, Brazil
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Oliveira D, de Melo FM, Toma HE. One-pot single step to label microtubule with MPA-capped CdTe quantum dots. Micron 2018; 108:19-23. [DOI: 10.1016/j.micron.2018.03.002] [Citation(s) in RCA: 2] [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] [Received: 01/16/2018] [Revised: 03/09/2018] [Accepted: 03/10/2018] [Indexed: 10/17/2022]
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da Silva MRE, Auvray T, Laramée-Milette B, Franco MP, Braga AAC, Toma HE, Hanan GS. Unusual Photooxidation of S-Bonded Mercaptopyridine in a Mixed Ligand Ruthenium(II) Complex with Terpyridine and Bipyridine Ligands. Inorg Chem 2018; 57:4898-4905. [DOI: 10.1021/acs.inorgchem.7b02965] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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)
- Maria Rosana E. da Silva
- Institute of Chemistry, University of Sao Paulo, Av. Prof. Lineu Prestes, 748, Butanta, 05508-000, São Paulo, SP, Brazil
- Département de Chimie, Université de Montréal, Montréal, Québec H3T-1J4, Canada
| | - Thomas Auvray
- Département de Chimie, Université de Montréal, Montréal, Québec H3T-1J4, Canada
| | | | - Maurício P. Franco
- Institute of Chemistry, University of Sao Paulo, Av. Prof. Lineu Prestes, 748, Butanta, 05508-000, São Paulo, SP, Brazil
| | - Ataualpa A. C. Braga
- Institute of Chemistry, University of Sao Paulo, Av. Prof. Lineu Prestes, 748, Butanta, 05508-000, São Paulo, SP, Brazil
| | - Henrique E. Toma
- Institute of Chemistry, University of Sao Paulo, Av. Prof. Lineu Prestes, 748, Butanta, 05508-000, São Paulo, SP, Brazil
| | - Garry S. Hanan
- Département de Chimie, Université de Montréal, Montréal, Québec H3T-1J4, Canada
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20
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Cincotto FH, Carvalho DAS, Canevari TC, Toma HE, Fatibello-Filho O, Moraes FC. A nano-magnetic electrochemical sensor for the determination of mood disorder related substances. RSC Adv 2018; 8:14040-14047. [PMID: 35539351 PMCID: PMC9079856 DOI: 10.1039/c8ra01857j] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 04/03/2018] [Indexed: 11/21/2022] Open
Abstract
The simultaneous electrochemical detection of mood disorder related substances, such as amitriptyline, melatonin and tryptophan, was successfully achieved by using a novel nano-magnetic electrochemical sensor design, encompassing Fe3O4 nanoparticles decorated with carbon quantum dots (MagNPs/Cdots). The magnetic composite was characterized using HR-TEM microscopy, XRD and Raman spectroscopy, and was applied onto a glassy carbon electrode using a miniature neodymium magnet. The determination of amitriptyline, melatonin and tryptophan was performed by monitoring oxidation promoted by MagNPs/Cdots in BR-buffer at pH 3.0, which proceeded according to well-defined differential pulse voltammetry peaks, with detection limits of 5.9, 4.4 and 4.2 nmol L−1, respectively. No significant interference was seen from biological interferents such as uric acid, ascorbic acid, dopamine, estriol and 17β-estradiol. The magnetic hybrid material was highly stable in solution, opening exciting opportunities for the development of low cost and practical electrochemical sensors for the determination of mood disorder related substances in real clinical samples. The simultaneous electrochemical detection of mood disorder related substances, amitriptyline, melatonin and tryptophan, was successfully achieved by using a novel nano-magnetic electrochemical sensor decorated with carbon quantum dots (MagNPs/Cdots).![]()
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21
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Guimaraes RR, Parussulo AL, Matias TA, Toma HE, Araki K. Electrostatic blocking barrier as an effective strategy to inhibit electron recombination in DSSCs. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.09.096] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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22
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Canevari TC, Cincotto FH, Gomes D, Landers R, Toma HE. Magnetite Nanoparticles Bonded Carbon Quantum Dots Magnetically Confined onto Screen Printed Carbon Electrodes and their Performance as Electrochemical Sensor for NADH. ELECTROANAL 2017. [DOI: 10.1002/elan.201700167] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Thiago C. Canevari
- Engineering School; Presbyterian University Mackenzie; 01302-907 São Paulo, SP Brazil
- Institute of Chemistry; University of São Paulo; 05508-000 São Paulo, SP Brazil
| | - Fernando H. Cincotto
- Department Chemistry; Federal University of São Carlos; 13565-905 São Carlos, SP Brazil
| | - Delmarcio Gomes
- Institute of Chemistry; University of São Paulo; 05508-000 São Paulo, SP Brazil
| | - Richard Landers
- Institute of physic; University of Campinas; 13560-970 Campinas, SP Brazil
| | - Henrique E. Toma
- Institute of Chemistry; University of São Paulo; 05508-000 São Paulo, SP Brazil
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23
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Bonacin JA, Toma SH, Nakamura M, Toma HE. Electrocatalytic activity in sensing of nitrite by films produced by electropolymerization of [Fe(Br-ph-tpy)2]2+. J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1295307] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Juliano A. Bonacin
- Institute of Chemistry, University of Campinas, UNICAMP, Campinas, Brazil
| | - Sergio. H. Toma
- Institute of Chemistry, University of São Paulo, São Paulo, Brazil
| | - Marcelo Nakamura
- Institute of Chemistry, University of São Paulo, São Paulo, Brazil
| | - Henrique E. Toma
- Institute of Chemistry, University of São Paulo, São Paulo, Brazil
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25
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Matias TA, Mangoni AP, Toma SH, Rein FN, Rocha RC, Toma HE, Araki K. Front Cover: Catalytic Water‐Oxidation Activity of a Weakly Coupled Binuclear Ruthenium Polypyridyl Complex (Eur. J. Inorg. Chem. 04/2017). Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201601445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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)
- Tiago A. Matias
- Department of ChemistryInstitute of ChemistryUniversity of São PauloAv. Lineu Prestes 748SP 05508‐000ButantãSão PauloBrazil
| | - Ana P. Mangoni
- Department of ChemistryInstitute of ChemistryUniversity of São PauloAv. Lineu Prestes 748SP 05508‐000ButantãSão PauloBrazil
| | - Sergio H. Toma
- Department of ChemistryInstitute of ChemistryUniversity of São PauloAv. Lineu Prestes 748SP 05508‐000ButantãSão PauloBrazil
| | - Francisca N. Rein
- Institute of ChemistryLos Alamos National Laboratory87545Los AlamosNMUSA
| | - Reginaldo C. Rocha
- Institute of ChemistryLos Alamos National Laboratory87545Los AlamosNMUSA
| | - Henrique E. Toma
- Department of ChemistryInstitute of ChemistryUniversity of São PauloAv. Lineu Prestes 748SP 05508‐000ButantãSão PauloBrazil
| | - Koiti Araki
- Department of ChemistryInstitute of ChemistryUniversity of São PauloAv. Lineu Prestes 748SP 05508‐000ButantãSão PauloBrazil
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26
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Matias TA, Mangoni AP, Toma SH, Rein FN, Rocha RC, Toma HE, Araki K. Catalytic Water‐Oxidation Activity of a Weakly Coupled Binuclear Ruthenium Polypyridyl Complex. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201601446] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tiago A. Matias
- Department of ChemistryInstitute of ChemistryUniversity of São PauloAv. Lineu Prestes 748SP 05508‐000ButantãSão PauloBrazil
| | - Ana P. Mangoni
- Department of ChemistryInstitute of ChemistryUniversity of São PauloAv. Lineu Prestes 748SP 05508‐000ButantãSão PauloBrazil
| | - Sergio H. Toma
- Department of ChemistryInstitute of ChemistryUniversity of São PauloAv. Lineu Prestes 748SP 05508‐000ButantãSão PauloBrazil
| | - Francisca N. Rein
- Institute of ChemistryLos Alamos National Laboratory87545Los AlamosNMUSA
| | - Reginaldo C. Rocha
- Institute of ChemistryLos Alamos National Laboratory87545Los AlamosNMUSA
| | - Henrique E. Toma
- Department of ChemistryInstitute of ChemistryUniversity of São PauloAv. Lineu Prestes 748SP 05508‐000ButantãSão PauloBrazil
| | - Koiti Araki
- Department of ChemistryInstitute of ChemistryUniversity of São PauloAv. Lineu Prestes 748SP 05508‐000ButantãSão PauloBrazil
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27
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Morais AF, Silva IGN, Sree SP, de Melo FM, Brabants G, Brito HF, Martens JA, Toma HE, Kirschhock CEA, Breynaert E, Mustafa D. Hierarchical self-supported ZnAlEu LDH nanotubes hosting luminescent CdTe quantum dots. Chem Commun (Camb) 2017; 53:7341-7344. [DOI: 10.1039/c7cc02097j] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Self-assembled, cylindrical LDH nanotubes (∅ 20nm) host large species such as nanodots or bulky substrates in their central cavity, leaving the interlayer space available for anionic sensitizer molecules.
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Affiliation(s)
- Alysson F. Morais
- Instituto de Física da Universidade de São Paulo
- 05508-090 – São Paulo
- Brazil
| | - Ivan G. N. Silva
- Instituto de Química da Universidade de São Paulo
- 05508-900 – São Paulo
- Brazil
| | | | - Fernando M. de Melo
- Instituto de Química da Universidade de São Paulo
- 05508-900 – São Paulo
- Brazil
| | - Gert Brabants
- KULeuven – Center for Surface Chemistry and Catalysis
- B-3001 Heverlee
- Belgium
| | - Hermi F. Brito
- Instituto de Química da Universidade de São Paulo
- 05508-900 – São Paulo
- Brazil
| | - Johan A. Martens
- KULeuven – Center for Surface Chemistry and Catalysis
- B-3001 Heverlee
- Belgium
| | - Henrique E. Toma
- Instituto de Química da Universidade de São Paulo
- 05508-900 – São Paulo
- Brazil
| | | | - Eric Breynaert
- KULeuven – Center for Surface Chemistry and Catalysis
- B-3001 Heverlee
- Belgium
| | - Danilo Mustafa
- Instituto de Física da Universidade de São Paulo
- 05508-090 – São Paulo
- Brazil
- KULeuven – Center for Surface Chemistry and Catalysis
- B-3001 Heverlee
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28
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Matias TA, Mangoni AP, Toma SH, Rein FN, Rocha RC, Toma HE, Araki K. Catalytic Water-Oxidation Activity of a Weakly Coupled Binuclear Ruthenium Polypyridyl Complex. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600889] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Tiago A. Matias
- Department of Chemistry; Institute of Chemistry; University of São Paulo; Av. Lineu Prestes 748 SP 05508-000 Butantã São Paulo Brazil
| | - Ana P. Mangoni
- Department of Chemistry; Institute of Chemistry; University of São Paulo; Av. Lineu Prestes 748 SP 05508-000 Butantã São Paulo Brazil
| | - Sergio H. Toma
- Department of Chemistry; Institute of Chemistry; University of São Paulo; Av. Lineu Prestes 748 SP 05508-000 Butantã São Paulo Brazil
| | | | | | - Henrique E. Toma
- Department of Chemistry; Institute of Chemistry; University of São Paulo; Av. Lineu Prestes 748 SP 05508-000 Butantã São Paulo Brazil
| | - Koiti Araki
- Department of Chemistry; Institute of Chemistry; University of São Paulo; Av. Lineu Prestes 748 SP 05508-000 Butantã São Paulo Brazil
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Parussulo AL, Matias TA, Guimaraes RR, Toma SH, Araki K, Toma HE. Accessing the charge separation effects in dye-sensitized solar cells based on a vectorial planning of supramolecular ruthenium dyes. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.09.039] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Santos JJ, Ivanov E, dos Santos DP, Toma HE, Corio P. Inside Back Cover: Detection of Plasmon Coupling between Silver Nanowires Based on Hyperspectral Darkfield and SERS Imaging and Supported by DDA Theoretical Calculations (ChemPhysChem 4/2016). Chemphyschem 2016. [DOI: 10.1002/cphc.201600099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jonnatan J. Santos
- Institute of Chemistry; University of Sao Paulo; Av. Prof. Lineu Prestes, 748, Cidade Universitaria Sao Paulo-SP 05508000 Brazil
| | - Evandro Ivanov
- Institute of Chemistry; University of Sao Paulo; Av. Prof. Lineu Prestes, 748, Cidade Universitaria Sao Paulo-SP 05508000 Brazil
| | - Diego P. dos Santos
- Institute of Chemistry; University of Campinas; Barao Geraldo Campinas-SP 13083970 Brazil
| | - Henrique E. Toma
- Institute of Chemistry; University of Sao Paulo; Av. Prof. Lineu Prestes, 748, Cidade Universitaria Sao Paulo-SP 05508000 Brazil
| | - Paola Corio
- Institute of Chemistry; University of Sao Paulo; Av. Prof. Lineu Prestes, 748, Cidade Universitaria Sao Paulo-SP 05508000 Brazil
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Santos JJ, Ivanov E, dos Santos DP, Toma HE, Corio P. Detection of Plasmon Coupling between Silver Nanowires Based on Hyperspectral Darkfield and SERS Imaging and Supported by DDA Theoretical Calculations. Chemphyschem 2016; 17:463-7. [DOI: 10.1002/cphc.201501051] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Indexed: 12/13/2022]
Affiliation(s)
- Jonnatan J. Santos
- Institute of Chemistry; University of Sao Paulo; Av. Prof. Lineu Prestes, 748, Cidade Universitaria Sao Paulo-SP 05508000 Brazil
| | - Evandro Ivanov
- Institute of Chemistry; University of Sao Paulo; Av. Prof. Lineu Prestes, 748, Cidade Universitaria Sao Paulo-SP 05508000 Brazil
| | - Diego P. dos Santos
- Institute of Chemistry; University of Campinas; Barao Geraldo Campinas-SP 13083970 Brazil
| | - Henrique E. Toma
- Institute of Chemistry; University of Sao Paulo; Av. Prof. Lineu Prestes, 748, Cidade Universitaria Sao Paulo-SP 05508000 Brazil
| | - Paola Corio
- Institute of Chemistry; University of Sao Paulo; Av. Prof. Lineu Prestes, 748, Cidade Universitaria Sao Paulo-SP 05508000 Brazil
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Toma HE. HENRY TAUBE CENTENARY - SOME REMARKS OF A GREAT SCIENTIST IN BRAZIL. QUIM NOVA 2016. [DOI: 10.5935/0100-4042.20160055] [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: 11/20/2022] Open
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Marques Netto CGC, da Silva DG, Toma SH, Andrade LH, Nakamura M, Araki K, Toma HE. Bovine glutamate dehydrogenase immobilization on magnetic nanoparticles: conformational changes and catalysis. RSC Adv 2016. [DOI: 10.1039/c5ra24637g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Glutamate dehydrogenase (GDH) was immobilized on different supports and systematically investigated in order to provide a better understanding of the immobilization effects on the catalysis of multimeric enzymes.
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Affiliation(s)
| | - Delmárcio G. da Silva
- Supramolecular NanotechLab
- Instituto de Quimica
- Universidade de São Paulo
- São Paulo-SP
- Brazil
| | - Sergio H. Toma
- Supramolecular NanotechLab
- Instituto de Quimica
- Universidade de São Paulo
- São Paulo-SP
- Brazil
| | - Leandro H. Andrade
- Laboratory of Fine Chemistry and Biocatalysis
- Instituto de Química
- Universidade de São Paulo
- São Paulo-SP
- Brazil
| | - Marcelo Nakamura
- Supramolecular NanotechLab
- Instituto de Quimica
- Universidade de São Paulo
- São Paulo-SP
- Brazil
| | - Koiti Araki
- Supramolecular NanotechLab
- Instituto de Quimica
- Universidade de São Paulo
- São Paulo-SP
- Brazil
| | - Henrique E. Toma
- Supramolecular NanotechLab
- Instituto de Quimica
- Universidade de São Paulo
- São Paulo-SP
- Brazil
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Marques Netto CGC, da Silva DG, Toma SH, Andrade LH, Nakamura M, Araki K, Toma HE. Correction: Bovine glutamate dehydrogenase immobilization on magnetic nanoparticles: conformational changes and catalysis. RSC Adv 2016. [DOI: 10.1039/c6ra90047j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Correction for ‘Bovine glutamate dehydrogenase immobilization on magnetic nanoparticles: conformational changes and catalysis’ by Caterina G. C. Marques Netto et al., RSC Adv., 2016, 6, 12977–12992.
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Affiliation(s)
| | | | - Sergio H. Toma
- Supramolecular NanotechLab
- Instituto de Quimica
- Universidade de São Paulo
- Brazil
| | - Leandro H. Andrade
- Laboratory of Fine Chemistry and Biocatalysis
- Instituto de Química
- Universidade de São Paulo
- Brazil
| | - Marcelo Nakamura
- Supramolecular NanotechLab
- Instituto de Quimica
- Universidade de São Paulo
- Brazil
| | - Koiti Araki
- Supramolecular NanotechLab
- Instituto de Quimica
- Universidade de São Paulo
- Brazil
| | - Henrique E. Toma
- Supramolecular NanotechLab
- Instituto de Quimica
- Universidade de São Paulo
- Brazil
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Netto CGCM, Andrade LH, Freitas RS, Toma HE. Association of Yeast Alcohol Dehydrogenase with Superparamagnetic Nanoparticles: Improving the Enzyme Stability and Performance. J Nanosci Nanotechnol 2015; 15:9482-9487. [PMID: 26682369 DOI: 10.1166/jnn.2015.10317] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Alcohol dehydrogenase (ADH) from Saccharomyces cerevisiae was covalently attached, via glutaraldehyde, to magnetite nanoparticles (MagNP) previously coated with aminopropyltriethoxysilane (MagNP/APTS), or with a silica shell followed by the APTS coating (MagNP@SiO2/APTS). In both cases, a great improvement of enzymatic activity has been observed for the ethanol-acetaldehyde conversion. The MagNP@SiO2/APTS-ADH system exhibited the best stability with respect to pH and temperature. Its residual activity after 10 successive recovery cycles and 24 h storage, was maintained around 80% in comparison with 20% for the MagNP/APTS system, and a null activity for free ADH. Luminescence measurements for the immobilized enzyme indicated the occurrence of conformational changes on ADH, contributing for its improved catalytic performance.
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Santos JJ, Ando RA, Toma SH, Corio P, Araki K, Toma HE. Surface enhanced Raman spectroelectrochemistry of a μ-oxo triruthenium acetate cluster: an experimental and theoretical approach. Inorg Chem 2015; 54:9656-63. [PMID: 26393946 DOI: 10.1021/acs.inorgchem.5b01751] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Surface enhanced Raman spectroelectrochemistry (SERS) spectroelectrochemistry provides a very sensitive technique to investigate the vibrational characteristics of coordination compounds and their particular behavior under the influence of plasmonic surfaces, concomitant with the exploitation of their redox properties and electronic spectra. The results, however, depend upon the mechanisms involved in the intensification of Raman spectra associated with the electromagnetic, resonance Raman and charge-transfer excitation at the Fermi levels. By probing the model complex [(Ru3O)(CH3COO)6(4,4'-bipy)3](n) (n = 1, 0, -1) adsorbed onto rough gold electrode surfaces, contrasting SERS profiles were obtained at several successive redox potentials and oxidation states, which enables a critical discussion on the role of the complex interaction with the gold surface, and the influence of the specific electronic bands in the triruthenium acetate cluster. Density functional theory (DFT) and time-dependent DFT calculations were carried out for the complex bound to an Au20 cluster to show the participation of active lowest unoccupied molecular orbital levels centered on the gold atoms. The corresponding charge-transfer band was predicted around 1200 nm, which supports a charge-transfer interpretation for the SERS response observed at λexc = 1064 nm. The selective enhancement of the vibrational modes was discussed based on the Raman theoretical calculations.
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Affiliation(s)
- Jonnatan J Santos
- Instituto de Química, Universidade de São Paulo , Av. Prof. Lineu Prestes, 748, CEP 05508-000, São Paulo, São Paulo, Brazil
| | - Romulo A Ando
- Instituto de Química, Universidade de São Paulo , Av. Prof. Lineu Prestes, 748, CEP 05508-000, São Paulo, São Paulo, Brazil
| | - Sergio H Toma
- Instituto de Química, Universidade de São Paulo , Av. Prof. Lineu Prestes, 748, CEP 05508-000, São Paulo, São Paulo, Brazil
| | - Paola Corio
- Instituto de Química, Universidade de São Paulo , Av. Prof. Lineu Prestes, 748, CEP 05508-000, São Paulo, São Paulo, Brazil
| | - Koiti Araki
- Instituto de Química, Universidade de São Paulo , Av. Prof. Lineu Prestes, 748, CEP 05508-000, São Paulo, São Paulo, Brazil
| | - Henrique E Toma
- Instituto de Química, Universidade de São Paulo , Av. Prof. Lineu Prestes, 748, CEP 05508-000, São Paulo, São Paulo, Brazil
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38
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Ferreira LMC, Grasseschi D, Santos MSF, Martins PR, Gutz IGR, Ferreira AMC, Araki K, Toma HE, Angnes L. Unveiling the structure of polytetraruthenated nickel porphyrin by Raman spectroelectrochemistry. Langmuir 2015; 31:4351-4360. [PMID: 25812035 DOI: 10.1021/acs.langmuir.5b00250] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The structure of polytetraruthenated nickel porphyrin was unveiled for the first time by electrochemistry, Raman spectroelectrochemistry, and a hydroxyl radical trapping assay. The electrocatalytic active material, precipitated on the electrode surface after successive cycling of [NiTPyP{Ru(bipy)2Cl}4](4+) species in strong aqueous alkaline solution (pH 13), was found to be a peroxo-bridged coordination polymer. The electropolymerization process involves hydroxyl radicals (as confirmed by the characteristic set of DMPO/(•)OH adduct EPR peaks) as reaction intermediates, electrocatalytically generated in the 0.80-1.10 V range, that induce the formation of Ni-O-O-Ni coordination polymers, as evidenced by Raman spectroelectrochemistry and molecular modeling studies. The film growth is halted above 1.10 V due to the formation of oxygen gas bubbles.
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Affiliation(s)
- Luís M C Ferreira
- †Instituto de Química, Universidade de São Paulo, CEP 05508-000 Sao Paulo, SP, Brazil
| | - Daniel Grasseschi
- †Instituto de Química, Universidade de São Paulo, CEP 05508-000 Sao Paulo, SP, Brazil
| | - Mauro S F Santos
- †Instituto de Química, Universidade de São Paulo, CEP 05508-000 Sao Paulo, SP, Brazil
| | - Paulo R Martins
- ‡Instituto de Química, Universidade Federal de Goiás, CEP 74001970 Goiania, GO, Brazil
| | - Ivano G R Gutz
- †Instituto de Química, Universidade de São Paulo, CEP 05508-000 Sao Paulo, SP, Brazil
| | - Ana Maria C Ferreira
- †Instituto de Química, Universidade de São Paulo, CEP 05508-000 Sao Paulo, SP, Brazil
| | - Koiti Araki
- †Instituto de Química, Universidade de São Paulo, CEP 05508-000 Sao Paulo, SP, Brazil
| | - Henrique E Toma
- †Instituto de Química, Universidade de São Paulo, CEP 05508-000 Sao Paulo, SP, Brazil
| | - Lúcio Angnes
- †Instituto de Química, Universidade de São Paulo, CEP 05508-000 Sao Paulo, SP, Brazil
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Grasseschi D, Ando RA, Toma HE, Zamarion VM. Unraveling the nature of Turkevich gold nanoparticles: the unexpected role of the dicarboxyketone species. RSC Adv 2015. [DOI: 10.1039/c4ra12161a] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
In this paper we show how surface coordination chemistry can elucidate one of the reproducibility issues related to the classical synthesis of gold nanoparticles by the Turkevich method.
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Affiliation(s)
| | - Rômulo A. Ando
- Instituto de Química
- Universidade de São Paulo
- São Paulo
- Brazil
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40
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Netto CGCM, Andrade LH, Toma HE. Association of Pseudomonas putida formaldehyde dehydrogenase with superparamagnetic nanoparticles: an effective way of improving the enzyme stability, performance and recycling. NEW J CHEM 2015. [DOI: 10.1039/c4nj01716a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The association of formaldehyde dehydrogenase fromPseudomonas putida(FalDH) with two different magnetic nanoparticles led to distinct enzyme responses depending upon the chemical modification process applied.
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41
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Toma SH, Santos JJ, Araki K, Toma HE. Pushing the surface-enhanced Raman scattering analyses sensitivity by magnetic concentration: a simple non core-shell approach. Anal Chim Acta 2014; 855:70-5. [PMID: 25542091 DOI: 10.1016/j.aca.2014.12.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Revised: 11/27/2014] [Accepted: 12/02/2014] [Indexed: 11/18/2022]
Abstract
A simple and accessible method for molecular analyses down to the picomolar range was realized using self-assembled hybrid superparamagnetic nanostructured materials, instead of complicated SERS substrates such as core-shell, surface nanostructured, or matrix embedded gold nanoparticles. Good signal-to-noise ratio has been achieved in a reproducible way even at concentrations down to 5×10(-11) M using methylene blue (MB) and phenanthroline (phen) as model species, exploiting the plasmonic properties of conventional citrate protected gold nanoparticles and alkylamine functionalized magnetite nanoparticles. The hot spots were generated by salt induced aggregation of gold nanoparticles (AuNP) in the presence of those analytes. Then, the aggregates of AuNP/analyte were decorated with small magnetite nanoparticles by electrostatic self-assembly forming MagSERS hybrid nanostructured materials. SERS peaks were enhanced up to 100 times after magnetic concentration in a circular spot using a magnet in comparison with the respective dispersion of the nanostructured material.
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Affiliation(s)
- Sergio H Toma
- Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, SP, 05508-000, Brazil.
| | - Jonnatan J Santos
- Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, SP, 05508-000, Brazil
| | - Koiti Araki
- Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, SP, 05508-000, Brazil.
| | - Henrique E Toma
- Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, SP, 05508-000, Brazil
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Grasseschi D, Lima FS, Nakamura M, Toma HE. Hyperspectral dark-field microscopy of gold nanodisks. Micron 2014; 69:15-20. [PMID: 25437851 DOI: 10.1016/j.micron.2014.10.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 10/31/2014] [Accepted: 10/31/2014] [Indexed: 10/24/2022]
Abstract
The light scattering properties of hexagonal and triangular gold nanodisks were investigated by means of Cytoviva hyperspectral dark-field microscopy, exploring the huge enhancement of the scattered waves associated with the surface plasmon resonance (SPR) effect. Thanks to the high resolution capability of the dark-field microscope, the SPR effect turned it possible to probe the individual nanoparticles directly from their hyperspectral images, extrapolating the classical optical resolution limit, and providing their corresponding extinction spectra. Blue spectral shifts involving the in-plane dipolar modes were observed for the hexagonal gold nanodisks in relation to the triangular ones, allowing their spectroscopic differentiation in the dark-field images.
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Affiliation(s)
- Daniel Grasseschi
- Instituto de Química, Universidade de São Paulo, Zip Code 26077, CEP 05513-970, São Paulo, Brazil
| | - Filipe S Lima
- Instituto de Química, Universidade de São Paulo, Zip Code 26077, CEP 05513-970, São Paulo, Brazil
| | - Marcelo Nakamura
- Instituto de Química, Universidade de São Paulo, Zip Code 26077, CEP 05513-970, São Paulo, Brazil
| | - Henrique E Toma
- Instituto de Química, Universidade de São Paulo, Zip Code 26077, CEP 05513-970, São Paulo, Brazil.
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Toledo KC, Matias TA, Jorge HB, Toma HE, Bonacin JA, de Souza VR. Non-innocent behavior of 1-(2′-pyridylazo)-2-naphtholate coordinated to polypyridine ruthenium(II) complexes. J COORD CHEM 2014. [DOI: 10.1080/00958972.2014.963064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Kalil C.F. Toledo
- Department of Chemistry, State University of Maringá, Maringá, Brazil
- Institute of Chemistry, University of Campinas – UNICAMP, Campinas-SP, Brazil
| | - Tiago A. Matias
- Institute of Chemistry, University of Sao Paulo, Sao Paulo, Brazil
| | - Herculys B. Jorge
- Department of Chemistry, State University of Maringá, Maringá, Brazil
| | - Henrique E. Toma
- Institute of Chemistry, University of Sao Paulo, Sao Paulo, Brazil
| | - Juliano A. Bonacin
- Institute of Chemistry, University of Campinas – UNICAMP, Campinas-SP, Brazil
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Assumpção AM, Bonacin JA, Toma SH, Zamarion VM, Toma HE. Probing surface−complex interactions with the bis(4-thienylterpyridine)iron(II) complex anchored on TiO2 and gold nanoparticles. CAN J CHEM 2014. [DOI: 10.1139/cjc-2014-0025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The bis(4-thienylterpyridine)iron(II) complex was employed, in comparison with the 4-phenylterpyridine analogue, as a molecular probe for monitoring the surface plasmon interactions with gold nanoparticles. The two complexes exhibited distinct SERS responses, confirming the binding of the thienyl group to the gold nanoparticles. Their inclusion into β-cyclodextrin anchored on TiO2 surfaces provided a useful system for applications in UV dosimetry, based on the gradual bleaching of the violet-blue color under sunlight and air.
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Affiliation(s)
| | | | - Sergio H. Toma
- Instituto de Química, Universidade de São Paulo, São Paulo, Brasil
| | | | - Henrique E. Toma
- Instituto de Química, Universidade de São Paulo, São Paulo, Brasil
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Naidek KP, Hoffmeister DM, Pazinato J, Westphal E, Gallardo H, Nakamura M, Araki K, Toma HE, Winnischofer H. Ruthenium Acetate Cluster Amphiphiles and Their Langmuir–Blodgett Films for Electrochromic Switching Devices. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201301442] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Karine P. Naidek
- Department of Chemistry, Universidade Federal do Paraná, Curitiba, Paraná 81531‐980, Brazil, http://www.quimica.ufpr.br/site/
| | - Denize M. Hoffmeister
- Department of Chemistry, Universidade Federal do Paraná, Curitiba, Paraná 81531‐980, Brazil, http://www.quimica.ufpr.br/site/
| | - Jaqueline Pazinato
- Department of Chemistry, Universidade Federal do Paraná, Curitiba, Paraná 81531‐980, Brazil, http://www.quimica.ufpr.br/site/
| | - Eduard Westphal
- Department of Chemistry, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina 88040‐900, Brazil
| | - Hugo Gallardo
- Department of Chemistry, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina 88040‐900, Brazil
| | - Marcelo Nakamura
- Department of Inorganic Chemistry, Chemistry Institute Universidade de São Paulo, São Paulo, São Paulo 05508‐000, Brazil
| | - Koiti Araki
- Department of Inorganic Chemistry, Chemistry Institute Universidade de São Paulo, São Paulo, São Paulo 05508‐000, Brazil
| | - Henrique E. Toma
- Department of Inorganic Chemistry, Chemistry Institute Universidade de São Paulo, São Paulo, São Paulo 05508‐000, Brazil
| | - Herbert Winnischofer
- Department of Chemistry, Universidade Federal do Paraná, Curitiba, Paraná 81531‐980, Brazil, http://www.quimica.ufpr.br/site/
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Toma HE. Alfred werner and heinrich rheinboldt: genealogy and scientific legacy. QUIM NOVA 2014. [DOI: 10.5935/0100-4042.20140093] [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: 11/20/2022] Open
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Affiliation(s)
- Caterina G. C. M. Netto
- Department of Chemistry, Institute of Chemistry, University of Sao Paulo, http://www.iq.usp.br
| | - Henrique E. Toma
- Department of Chemistry, Institute of Chemistry, University of Sao Paulo, http://www.iq.usp.br
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Abstract
Nanotechnology and green chemistry can have much in common from the point of view
of processes, considering the possibilities of improving efficiency and quality,
achieving a better economy of atoms and energy, promoting catalysis under mild
and sustainable conditions, and facilitating online monitoring of production
lines and environment. Some of these aspects are dealt with in this paper,
focusing on selected examples of application of functionalized nanoparticles and
-materials in chemistry and industry.
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Affiliation(s)
- Henrique E. Toma
- 1Instituto de Quimica, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
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Grasseschi D, Parussulo ALA, Zamarion VM, Guimarães RR, Araki K, Toma HE. How relevant can the SERS effect in isolated nanoparticles be? RSC Adv 2013. [DOI: 10.1039/c3ra41818a] [Citation(s) in RCA: 8] [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] Open
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