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Artículos de revistas sobre el tema "Cluster poly-Oxo"

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Autor: Grafiati
Publicado: 22 de junio de 2023

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1

Martin, Nicolas P., Christophe Volkringer, Pascal Roussel, Juliane März, Christoph Hennig, Thierry Loiseau y Atsushi Ikeda-Ohno. "{Np38} clusters: the missing link in the largest poly-oxo cluster series of tetravalent actinides". Chemical Communications 54, n.º 72 (2018): 10060–63. http://dx.doi.org/10.1039/c8cc03744b.

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2

Trabelsi, Sondes, Giulia Fornasieri, Laurence Rozes, Andreas Janke, Axel Mensch, Clément Sanchez y Manfred Stamm. "Tailoring the structure of hybrid organic inorganic nanomaterials built on tetra- and polyfunctional alco-oxo-titanium clusters in polystyrene". Journal of Applied Crystallography 39, n.º 5 (12 de septiembre de 2006): 656–60. http://dx.doi.org/10.1107/s0021889806028871.

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Functional titanium oxo-clusters Ti16O16(OEt)32−x(OPhCH=CH2)xwith different numbers of styrenic groups, wherex= 4 (tetra) andx= 16 (poly), have been synthesized and copolymerized with styrene. The resulting hybrid nanomaterials present three-dimensional networks in which the inorganic nano-fillers are covalently linked to the inorganic polymer. The influence of the number of functional groups borne by the oxo clusters on the structure of the resulting hybrid nanomaterials has been investigated by a combination of small-angle X-ray scattering, transmission electron microscopy and energy-filtering transmission electron microscopy. Compared with the tetra-functional clusters, the poly-functional clusters were better dispersed in the hybrid phase even at very high cluster content (between 5 and 10 wt%). Independently of the number of functional groups, three structural levels (i.e.largest, intermediate and primary clusters) have been revealed. The size of the aggregates has been found to be reduced by increasing the number of styrenic reactive groups.
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3

Dufaye, Maxime, Nicolas P. Martin, Sylvain Duval, Christophe Volkringer, Atsushi Ikeda-Ohno y Thierry Loiseau. "Time-controlled synthesis of the 3D coordination polymer U(1,2,3-Hbtc)2 followed by the formation of molecular poly-oxo cluster {U14} containing hemimellitate uranium(iv)". RSC Advances 9, n.º 40 (2019): 22795–804. http://dx.doi.org/10.1039/c9ra03707a.

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4

Patrahau, Bianca, Clément Chaumont, Laurent Barloy, Petra Hellwig, Marc Henry, Frédéric Melin, Matthias Pauly y Pierre Mobian. "From a bulk solid to thin films of a hybrid material derived from the [Ti10O12(cat)8(py)8] oxo-cluster and poly(4-vinylpyridine)". New Journal of Chemistry 43, n.º 3 (2019): 1581–88. http://dx.doi.org/10.1039/c8nj05410j.

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Homogeneous coloured hybrid materials are prepared from the [Ti10O12(cat)8(py)8] oxo-cluster and poly(4-vinylpyridine). SiO2 surfaces are functionalized with thin films of this material.
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5

Falaise, Clément, Christophe Volkringer, Jean-François Vigier, Arnaud Beaurain, Pascal Roussel, Pierre Rabu y Thierry Loiseau. "Isolation of the Large {Actinide}38 Poly-oxo Cluster with Uranium". Journal of the American Chemical Society 135, n.º 42 (11 de octubre de 2013): 15678–81. http://dx.doi.org/10.1021/ja4067207.

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6

Falaise, Clément, Christophe Volkringer, Christoph Hennig y Thierry Loiseau. "Ex-Situ Kinetic Investigations of the Formation of the Poly-Oxo Cluster U38". Chemistry - A European Journal 21, n.º 46 (29 de septiembre de 2015): 16654–64. http://dx.doi.org/10.1002/chem.201502207.

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7

Akashi, Daisuke, Hiroaki Kido, Yoichi Sasaki y Tasuku Ito. "Preparation and Electrochemical Response of Poly(4-vinylpyridine)-Coordinated Oxo-acetato Triruthenium Cluster Film". Chemistry Letters 21, n.º 1 (enero de 1992): 143–46. http://dx.doi.org/10.1246/cl.1992.143.

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8

Louisy, Elodie, Séverine Bellayer, Gaëlle Fontaine, Laurence Rozes y Fanny Bonnet. "Novel hybrid poly(l-lactic acid) from titanium oxo-cluster via reactive extrusion polymerization". European Polymer Journal 122 (enero de 2020): 109238. http://dx.doi.org/10.1016/j.eurpolymj.2019.109238.

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9

Armstrong, Fraser A. "Why did Nature choose manganese to make oxygen?" Philosophical Transactions of the Royal Society B: Biological Sciences 363, n.º 1494 (30 de octubre de 2007): 1263–70. http://dx.doi.org/10.1098/rstb.2007.2223.

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This paper discusses the suitability of manganese for its function in catalysing the formation of molecular oxygen from water. Manganese is an abundant element. In terms of its inherent properties, Mn has a particularly rich redox chemistry compared with other d-block elements, with several oxidizing states accessible. The most stable-state Mn 2+ behaves like a Group 2 element—it is mobile, weakly complexing, easily taken up by cells and redox-inactive in simple aqueous media. Only in the presence of suitable ligands does Mn 2+ become oxidized, so it provides an uncomplicated building unit for the oxygen-evolving centre (OEC). The intermediate oxidation states Mn(III) and Mn(IV) are strongly complexed by O 2− and form robust mixed-valence poly-oxo clusters in which the Mn(IV)/Mn(III) ratio can be elevated, one electron at a time, accumulating oxidizing potential and capacity. The OEC is a Mn 4 CaO x cluster that undergoes sequential oxidations by P680 + at potentials above 1 V, ultimately to a super-oxidized level that includes one Mn(V) or a Mn(IV)-oxyl radical. The latter is powerfully oxidizing and provides the crucial ‘power stroke’ necessary to generate an O–O bond. This leaves a centre still rich in Mn(IV), ensuring a rapid follow-through to O 2 .
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10

Martin, Nicolas P., Christophe Volkringer, Natacha Henry, Xavier Trivelli, Grégory Stoclet, Atsushi Ikeda-Ohno y Thierry Loiseau. "Formation of a new type of uranium(iv) poly-oxo cluster {U38} based on a controlled release of water via esterification reaction". Chemical Science 9, n.º 22 (2018): 5021–32. http://dx.doi.org/10.1039/c8sc00752g.

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11

Janek, Maciej, Tadeusz M. Muzioł y Piotr Piszczek. "Trinuclear Oxo-Titanium Clusters: Synthesis, Structure, and Photocatalytic Activity". Materials 12, n.º 19 (29 de septiembre de 2019): 3195. http://dx.doi.org/10.3390/ma12193195.

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The interest in titanium (IV) oxo-complexes is due to their potential application in photodegradation processes and environmental pollutants reduction. Titanium (IV) oxo-complexes (TOCs) of the general formula [Ti3O(OiPr)8(OOCR’)2] (R’ = -C13H9 (1), -p-PhCl (2), -m-PhNO2 (3), -C4H7 (4)) were synthesized and structurally characterized. The use of the different carboxylate ligands allowed modulating the optical band gaps of the produced microcrystals, which were measured via diffuse reflectance ultraviolet and visible spectroscopy (UV-Vis-DRS) and calculated using the density functional theory (DFT) method. The dispersion of TOCs (1–3) in the poly (methyl methacrylate) matrix (PMMA) led to the formation of polymer/TOCs composites, which in the next stage of our works have been applied in the photocatalytic activity estimation of synthesized trinuclear Ti(IV) oxo-complexes. Studies of the photocatalytic degradation of methylene blue (MB) induced by UV irradiation exhibit that the PMMA-TOCs composite containing (1) oxo-clusters is the most active, followed by the system containing the complex (3).
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12

Janek, Maciej, Aleksandra Radtke, Tadeusz Muzioł, Maria Jerzykiewicz y Piotr Piszczek. "Tetranuclear Oxo-Titanium Clusters with Different Carboxylate Aromatic Ligands: Optical Properties, DFT Calculations, and Photoactivity". Materials 11, n.º 9 (8 de septiembre de 2018): 1661. http://dx.doi.org/10.3390/ma11091661.

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Titanium(IV) oxo-clusters of the general formula (Ti4O2(OiBu)10(O2CR’)2) (R’ = C13H9 (1), PhCl (2), PhNO2 (3)) were studied in order to estimate their potential photoactivity. The structure of the resulting tetranuclear Ti(IV) oxo-complexes was then determined via single crystal X-ray diffraction, infrared and Raman spectroscopy, and electron spin resonance (ESR). An analysis of diffuse reflectance spectra (DRS) allowed for the assessment of band gap values of (1)–(3) microcrystalline samples complexes. The use of different carboxylate ligands allowed the band gap of tetranuclear Ti(IV) oxo-clusters to be modulated in the range of 3.6 eV–2.5 eV. Density functional theory (DFT) methods were used to explain the influence of substitutes on band gap and optical activity. Dispersion of (1)–(3) microcrystals in the poly(methyl methacrylate) (PMMA) matrixes enabled the formation of composite materials for which the potential photocatalytic activity was estimated through the study on methylene blue (MB) photodegradation processes in the presence of UV light. The results obtained revealed a significant influence of carboxylate ligands functionalization on the photoactivity of synthesized tetranuclear Ti(IV) oxo-complexes.
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13

Fracasso, Giulio, Paolo Ghigna, Luca Nodari, Stefano Agnoli, Denis Badocco, Paolo Pastore, Elena Nicolato et al. "Nanoaggregates of iron poly-oxo-clusters obtained by laser ablation in aqueous solution of phosphonates". Journal of Colloid and Interface Science 522 (julio de 2018): 208–16. http://dx.doi.org/10.1016/j.jcis.2018.03.065.

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14

Chen, Jing-Lin, Li-Yi Zhang, Lin-Xi Shi, Hen-Yun Ye y Zhong-Ning Chen. "Syntheses, characterization and redox properties of di- and poly-phosphine linked oligomeric complexes of oxo-centered triruthenium clusters". Inorganica Chimica Acta 359, n.º 5 (marzo de 2006): 1531–40. http://dx.doi.org/10.1016/j.ica.2005.12.027.

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15

Périneau, Fabien, Sandrine Pensec, Capucine Sassoye, François Ribot, Luk van Lokeren, Rudolph Willem, Laurent Bouteiller, Clément Sanchez y Laurence Rozes. "New hybrid core–shell star-like architectures made of poly(n-butyl acrylate) grown from well-defined titanium oxo-clusters". Journal of Materials Chemistry 21, n.º 12 (2011): 4470. http://dx.doi.org/10.1039/c0jm04047a.

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