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Stimulation of Sulfonamides Antibacterial Drugs Activity as a Result of Complexation with Ru(III): Physicochemical and Biological Study. Int J Mol Sci 2021; 22:ijms222413482. [PMID: 34948278 PMCID: PMC8708937 DOI: 10.3390/ijms222413482] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 12/03/2021] [Accepted: 12/12/2021] [Indexed: 11/16/2022] Open
Abstract
Antibiotic resistance is a global problem, and one promising solution to overcome this issue is using metallodrugs, which are drugs containing metal ions and ligands. These complexes are superior to free ligands in various characteristics including anticancer properties and mechanism of action. The pharmacological potential of metallodrugs can be modulated by the appropriate selection of ligands and metal ions. A good example of proper coordination is the combination of sulfonamides (sulfamerazine, sulfathiazole) with a ruthenium(III) ion. This work aimed to confirm that the activity of sulfonamides antibacterial drugs is initiated and/or stimulated by their coordination to an Ru(III) ion. The study determined the structure, electrochemical profile, CT-DNA affinity, and antimicrobial as well as anticancer properties of the synthesized complexes. The results proved that Ru(III) complexes exhibited better biological properties than the free ligands.
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Beyerlein KR, Scardi P. Simulating the diffraction line profile from nanocrystalline powders using a spherical harmonics expansion. ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES 2018; 74:640-646. [PMID: 30378575 DOI: 10.1107/s2053273318011452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Accepted: 08/11/2018] [Indexed: 11/10/2022]
Abstract
An accurate description of the diffraction line profile from nanocrystalline powders can be obtained by a spherical harmonics expansion of the profile function. The procedure outlined in this work is found to be computationally efficient and applicable to the line profile for any crystallite shape and size. Practical examples of the diffraction pattern peak profiles resulting from cubic crystallites between 1 and 100 nm in size are shown.
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Affiliation(s)
- K R Beyerlein
- Center for Free-Electron Laser Science, Max Planck Institute for the Structure and Dynamics of Matter, Luruper Chaussee 149, Hamburg, 22761, Germany
| | - P Scardi
- Department of Civil, Environment and Mechanical Engineering, University of Trento, via Mesiano 77, Trento, Trento 38123, Italy
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Ichikawa RU, Roca AG, López-Ortega A, Estrader M, Peral I, Turrillas X, Nogués J. Combining X-Ray Whole Powder Pattern Modeling, Rietveld and Pair Distribution Function Analyses as a Novel Bulk Approach to Study Interfaces in Heteronanostructures: Oxidation Front in FeO/Fe 3 O 4 Core/Shell Nanoparticles as a Case Study. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1800804. [PMID: 29952138 DOI: 10.1002/smll.201800804] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 05/08/2018] [Indexed: 06/08/2023]
Abstract
Understanding the microstructure in heterostructured nanoparticles is crucial to harnessing their properties. Although microscopy is ideal for this purpose, it allows for the analysis of only a few nanoparticles. Thus, there is a need for structural methods that take the whole sample into account. Here, a novel bulk-approach based on the combined analysis of synchrotron X-ray powder diffraction with whole powder pattern modeling, Rietveld and pair distribution function is presented. The microstructural temporal evolution of FeO/Fe3 O4 core/shell nanocubes is studied at different time intervals. The results indicate that a two-phase approach (FeO and Fe3 O4 ) is not sufficient to successfully fit the data and two additional interface phases (FeO and Fe3 O4 ) are needed to obtain satisfactory fits, i.e., an onion-type structure. The analysis shows that the Fe3 O4 phases grow to some extent (≈1 nm) at the expense of the FeO core. Moreover, the FeO core progressively changes its stoichiometry to accommodate more oxygen. The temporal evolution of the parameters indicates that the structure of the FeO/Fe3 O4 nanocubes is rather stable, although the exact interface structure slightly evolves with time. This approach paves the way for average studies of interfaces in different kinds of heterostructured nanoparticles, particularly in cases where spectroscopic methods have some limitations.
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Affiliation(s)
- Rodrigo U Ichikawa
- IPEN-Instituto de Pesquisas Energéticas e Nucleares, Av. Prof. Lineu Prestes, 2242 - Cidade Universitária, São Paulo, SP, 05508-000, Brazil
| | - Alejandro G Roca
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST,, Campus UAB, Bellaterra, E-08193, Barcelona, Spain
| | | | - Marta Estrader
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST,, Campus UAB, Bellaterra, E-08193, Barcelona, Spain
| | - Inma Peral
- ALBA Synchrotron, Carrer de la Llum, 2-26, Cerdanyola del Vallés, E-08290, Barcelona, Spain
- Physics and Materials Science Research Unit, University of Luxembourg, L-1511, Luxembourg, Luxembourg
- Materials Research and Technology Department, Luxembourg Institute of Science and Technology, L-4422, Belvaux, Luxembourg
| | - Xabier Turrillas
- ALBA Synchrotron, Carrer de la Llum, 2-26, Cerdanyola del Vallés, E-08290, Barcelona, Spain
- Institut de Ciència de Materials de Barcelona- CSIC, UAB Campus, Cerdanyola del Vallès, E-08193, Barcelona, Spain
| | - Josep Nogués
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST,, Campus UAB, Bellaterra, E-08193, Barcelona, Spain
- ICREA, Pg. Lluís Companys 23, E-08010, Barcelona, Spain
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Vorontsov AV, Tsybulya SV. Influence of Nanoparticles Size on XRD Patterns for Small Monodisperse Nanoparticles of Cu0 and TiO2 Anatase. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.7b04480] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexander V. Vorontsov
- Altai State University, Prospekt
Lenina 61, Barnaul 656049, Russia
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Prospekt Akademia Lavrentyeva 9, Novosibirsk 630090, Russia
| | - Sergei V. Tsybulya
- Boreskov Institute of Catalysis, Prospekt Akademia Lavrentyeva 5, Novosibirsk 630090, Russia
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Gelisio L, Scardi P. 100 years of Debye's scattering equation. ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES 2016; 72:608-620. [DOI: 10.1107/s2053273316014881] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 09/21/2016] [Indexed: 11/10/2022]
Abstract
Debye's scattering equation (DSE) has spanned a century of scientific development, from the dawn of quantum mechanics and the investigation of the structure of atoms and molecules to the era of nanotechnology, paving the way tototal scatteringmethods. The formulation offers the most accurate representation of the intensity scattered by randomly oriented atomic aggregates, constructed by superimposing the signal from each atomic distance in the molecule. The present paper reviews some of the milestone applications, from the interpretation of the intensity curves from gases and vapours, to aggregates of increasing size and more extended order. Important developments, aimed at mitigating the prohibitive computational complexity of the DSE, and state-of-the-art methods for the characterization of static and dynamic displacements are also discussed.
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Manceau A, Marcus MA, Grangeon S, Lanson M, Lanson B, Gaillot AC, Skanthakumar S, Soderholm L. Short-range and long-range order of phyllomanganate nanoparticles determined using high-energy X-ray scattering. J Appl Crystallogr 2013. [DOI: 10.1107/s0021889812047917] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
High-energy X-ray scattering (HEXS) is used to explore the pH-dependent structure of randomly stacked manganese oxide nanosheets of nominal formula δ-MnO2. Data are simulated in real space by pair distribution function (PDF) analysis and in reciprocal space by both the Bragg-rod method and the Debye equation in order to maximize the information gained from the total scattering measurements. The essential new features of this triple-analysis approach are (1) the use of a two-dimensional supercell in PDF modeling to describe local distortions around Mn layer vacancies, (2) the implementation in Bragg-rod calculations of a lognormal crystal size distribution in the layer plane and an empirical function for the effect of strain, and (3) the incorporation into the model used with the Debye equation of an explicit elastic deformation of the two-dimensional nanocrystals. The PDF analysis reveals steady migration at acidic pH of the Mn atoms from layer to interlayer sites, either above or below the Mn layer vacancies, and important displacement of the remaining in-layer Mn atoms toward vacancies. The increased density of the vacancy–interlayer Mn pairs at low pH causes their mutual repulsion and results in short-range ordering. The layer microstructure, responsible for the long-range lateral disorder, is modeled with spherically and cylindrically bent crystallites having volume-averaged radii of 20–40 Å. Thebunit-cell parameter from the hexagonal layer has different values in PDF, Bragg-rod and Debye equation modeling, because of the use of different weighting contributions from long-range and short-range distances in each method. The PDFbparameter is in effect a measure of the average inlayer Mn...Mn distance and consistently deviates from the average structure value determined by the Bragg-rod method by 0.02 Å at low pH, as a result of the local relaxation induced by vacancies. The layer curvature increases the Bragg-rod value by 0.01–0.02 Å with the cylindrical model and as much as 0.04–0.05 Å with the spherical model. Therefore, in principle, the diffraction alone can unambiguously determine with good accuracy only a volume-averaged apparent layer dimension of the manganese oxide nanosheets. Thebparameter is model dependent and has no single straightforward interpretation, so comparison ofbbetween different samples only makes sense if done in the context of a single specified model.
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Beyerlein KR, Snyder RL, Scardi P. Powder diffraction line profiles from the size and shape of nanocrystallites. J Appl Crystallogr 2011. [DOI: 10.1107/s0021889811030743] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
A numerical procedure to carry out the integral on the powder diffraction sphere in reciprocal space and obtain accurate powder diffraction peak profiles for small crystallites is presented. In doing so, the literature surrounding the effect of crystallite size and shape on the powder peak profile is briefly reviewed. Powder patterns simulated by this technique are compared with those calculated by the tangent plane approximation and Debye function for spherical, cubic and cylindrical crystallites having sizes of only a few nanometres. The tangent plane approximation is found to produce inaccurate peak profiles and peak positions in simulated patterns of the cubic and cylindrical nanocrystallites. This performance is in contrast to that of the proposed powder integration technique, which results in powder patterns that are in good agreement with those from the Debye function, for all crystallite sizes and shapes considered here.
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