Thèses sur le sujet « Transition Metal Borates »
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Knyrim, Johanna S. « Synthetic Investigations of Main Group and Transition Metal Borates at Extreme Conditions ». Diss., lmu, 2008. http://nbn-resolving.de/urn:nbn:de:bvb:19-91414.
Texte intégralKnyrim, Johanna S. « Synthetic investigations into main group and transition metal borates at extreme conditions ». kostenfrei, 2008. http://edoc.ub.uni-muenchen.de/9141/.
Texte intégralAboelenen, Ahmed. « Development of 3d Transition Metal Complexes of Hydrotris(pyrazolyl)borates (Tp) asRedox Catalysts ». Ohio University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1572809656086338.
Texte intégralChettri, Sailesh. « Exploration of Catalytic Activities of Some Transition Metal Borates for Green Synthesis of Nitrogen Containing Heterocyclic Compounds ». Thesis, University of North Bengal, 2022. http://ir.nbu.ac.in/handle/123456789/5098.
Texte intégralAbbali, Zineb. « Etude de la cristallisation de ferrites spinelles dans des verres borates ». Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb376110731.
Texte intégralMerle, Nicolas. « Transition metal complexes of chelating phosphine boranes ». Thesis, University of Bath, 2006. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426296.
Texte intégralAbdi, Djamila. « Application de l'electrode a disque tournant a l'etude du comportement electrochimique du cuivre en milieu neutre et en milieu acide en absence et en presence d'especes sulfurees ». Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13176.
Texte intégralSilva, André Diniz Rosa da. « Preparação e caracterização de um novo sistema vítreo multicomponente a base de óxido de boro ». Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/88/88131/tde-06052013-192859/.
Texte intégralGlasses are attractive materials on a scientific and technologic point of view especially because some of their chemical compositions can provide a large scale production and/or may present physicochemical properties that them become promising candidates for applications as laser active environments, optical filters, optical fibers, mechanical shielding, adornment, domestic tools or construction stuff, among others. One of the challenges in preparing new compositions of glassy materials is to ensure that does not appear the phenomenon of devitrification. This work was carried out in order to prepare and characterize a new multicomponent glassy matrix, the basis of boron oxide, free from crystallization phenomenon. Pure glassy samples of [50B2O3 - 15ZnO - 10PbO - 8MgO - 6K2O - 2Al2O3 - 2Nb2O5 - 5Si2O - 2Na2O % wt] and 0.1% mol of transition metal ions (MnO2, Fe2O3, CoO, NiO, CuO e CdCl2) doped were prepared in open atmosphere electric furnace using platinum crucible and characterized using x-ray diffraction, thermal analysis, density evaluation from Archimedes principle, Vickers microhardness measurements, colorimetry, UV-VIS optical absorption and IR optical transmission. X-ray diffraction results confirmed non-crystalline character of the vitreous samples. Dopants addition led to changing on the coordination number of the borate network. Optical absorption results showed that the new glassy matrix developed with addition of transition metal ions absorb in the visible and near infrared range. These glasses may have potential applications in decorative products and as optical filters.
Cetin, Anil. « TRANSITION METAL COMPLEXES OF PORPHYRIN ANALOGS AND BORATE-BASED COORDINATION COMPLEXES ». University of Akron / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=akron1176390111.
Texte intégralHallett, Andrew Jon. « The chemistry of poly(pyrazolyl)borate and poly(pyrazolyl)methane transition metal complexes ». Thesis, University of Bristol, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251095.
Texte intégralBrunker, Timothy J. « Studies of half-sandwich tris(pyrazolyl)borate complexes of first row transition metals ». Thesis, University of Oxford, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393565.
Texte intégralSloan, Matthew Edward. « Transition Metal Catalysed Dehydrocoupling of Amine- Borane Adducts : Mechanistic Insight and Applications ». Thesis, University of Bristol, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520659.
Texte intégralBeguerie, Marion. « Hydrogénation catalysée de cyanoboranes : de l'étude du mécanisme à l'étude des propriétés de composés BN cycliques ». Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30326/document.
Texte intégralThe manuscript presents an in-depth study on the ruthenium-catalyzed hydrogenation/cyclization of cyano-aminoboranes for the synthesis of cyclic BN-compounds. The first chapter is a bibliographic introduction highlighting the interest in cyclic BN-molecules and describing key elementary steps in catalytic systems involving B-H bond activation and CN bond reduction, leading in particular to B?N bond formation. A focus on the reactivity of the bis(dihydrogen) complexes, RuH2(H2)2(PR3)2, with B-H and CN bonds will be provided. The second chapter presents the synthesis and characterization of a series of cyano-aminoboranes along with their catalytic transformation using RuH2(H2)2 (PCy3)2 under H2. The corresponding cyclic 1H-2,1-benzazaboroles are cleanly formed and characterized by NMR, IR, X-ray, and HRMS. The third chapter details a mechanistic investigation on the catalytic process with the discovery of some elementary steps, the isolation of a complex featuring the substrate in transformation, and the understanding of the hydrogen transfer processes. Stoichiometric reactions, variable temperature NMR experiments and theoretical calculations will be in particular analyzed. The fourth chapter contains a study on the synthetic potential of the newly formed 1H-2,1-benzazaborole parent. Its reactivity in basic conditions as well as its catalytic transformation using well-established N-H bond cleavage systems are assessed. The specific case of cyclotrimerization of 1H-2,1-benzazaboroles into cyclic borazines is detailed in chapter 5 along with a study on their optoelectronic properties
Metin, Onder. « Synthesis And Characterization Of Water Soluble Polymer Stabilized Transition Metal(0) Nanoclusters As Catalyst In Hydrogen Generation From The Hydrolysis Of Sodium Borohydride And Ammonia Borane ». Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612717/index.pdf.
Texte intégral(i) the reduction of metal precursors by sodium borohydride in the presence poly(N-vinyl pyrrolidone) (PVP) in methanol solution after 1h reflux, (ii) the in situ generation during the hydrolysis of ammonia borane in the presence of poly(4-styrene sulfonicacid-co-maleic acid) (PSSA-co-MA). The characterization of both type of polymer stabilized transition metal(0) nanoclusters were done by using UV-Visible electronic absorption spectroscopy (UV-Vis), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and FT-IR techniques. The catalytic activity of PVP stabilized nickel(0), cobalt(0) and ruthenium(0) nanoclusters was tested in the hydrolysis of NaBH4 and AB. The catalytic acitivity of PSSA-co-MA stabilized nickel(0), cobalt(0) and ruthenium(0) nanoclusters was tested only in the hydrolysis of AB in which they were in situ generated. The kinetics of hydrogen generation from both hydrolysis reactions in the presence PVP or PSSA-co-MA stabilized nickel(0), cobalt(0) and ruthenium(0) nanoclusters were studied depending on the polymer to metal ratio, catalyst concentration, substrate concentration and temperature as well as the activation parameters (Arrhenius activation energy (Ea), activation enthalpy (
Capobianco, Natan. « La couleur des vitraux au XIIIème siècle. Étude chimique et spectroscopique ». Electronic Thesis or Diss., Sorbonne université, 2018. http://www.theses.fr/2018SORUS296.
Texte intégralColour variety of medieval stained glass is a characteristic feature of gothic cathedrals. Glass colour results mainly from ions of metals such as copper, iron and cobalt, and depends on parameters from glass fabrication, like its chemical composition or the furnace atmosphere. These glasses are thus important witnesses in the history of glass technology. First, we summarised the reported French medieval glass compositions, to work out the relationship between their changes over time and geography and the prime materials that have been used. The restoration of the Rose of Reims Cathedral allowed us to use optical absorption spectroscopy, with a portable device specifically designed, to analyse in a non-invasive manner the glass colours of this major window and the origin of the colourations. We showed how medieval glassmakers mastered many colouration processes and comparison with glass from previous restorations showed the consideration of restorers for matching the colour of ancient glasses. Among the colours, colourless to purple glasses are all coloured by a mixture of iron and manganese. Thank to XANES and optical absorption spectroscopies, and to the comparison between medieval glasses from state reserves and reproduction glasses we synthesised, we show that mastering of colourless to purple colouring result from a smart control of the oxidoreductive conditions in the furnace during glassmaking
Ewald, Bastian. « Borophosphate der Haupt- und Nebengruppenmetalle : Synthese, Charakterisierung und Strukturchemische Klassifizierung ». Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2006. http://nbn-resolving.de/urn:nbn:de:swb:14-1165332117390-21543.
Texte intégralArliguie, Thérèse. « Complexes du ruthenium hydrures et derives de l'hydrogene moleculaire : reactions de deshydrogenation inter et intramoleculaires ». Toulouse 3, 1988. http://www.theses.fr/1988TOU30111.
Texte intégralKnyrim, Johanna S. [Verfasser]. « Synthetic investigations of main group and transition metal borates at extreme conditions / Johanna S. Knyrim ». 2008. http://d-nb.info/991063589/34.
Texte intégralEliseo, Jennifer R. « Synthesis and characterization of novel anionic transition metal borohydrides ». Thesis, 2007. http://hdl.handle.net/10125/20473.
Texte intégralBhagabati, Jayashree. « Carbon aerogel supported first-row transition metal catalysts for methanolyis of ammonia borane ». Thesis, 2019. https://etd.iisc.ac.in/handle/2005/4743.
Texte intégralBera, Barun. « Influence of Ancillary Ligands in the Chemistry of Transition Metal σ-Complexes ». Thesis, 2014. http://etd.iisc.ac.in/handle/2005/2691.
Texte intégralBera, Barun. « Influence of Ancillary Ligands in the Chemistry of Transition Metal σ-Complexes ». Thesis, 2014. http://etd.iisc.ernet.in/handle/2005/2691.
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