Bibliografías temáticas / Transition Metal Borates

Literatura académica sobre el tema "Transition Metal Borates"

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Publicado: 18 de mayo de 2024

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Artículos de revistas sobre el tema "Transition Metal Borates"

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Didelot, Emilie, Zbigniew Łodziana, Fabrizio Murgia y Radovan Černý. "Ethanol- and Methanol-Coordinated and Solvent-Free Dodecahydro closo-Dodecaborates of 3d Transition Metals and of Magnesium". Crystals 9, n.º 7 (21 de julio de 2019): 372. http://dx.doi.org/10.3390/cryst9070372.

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Magnesium and 3d transition metals closo-borates were prepared by mechanosynthesis (ball milling) of the mixtures Na2B12H12 + MCl2 (M = Mn, Fe, Co, Ni, Mg), followed by addition of ethanol or methanol and drying under dynamic vacuum. The dead mass of NaCl is partly removed by filtration. The crystal structures of solvent-coordinated and solvent-free closo-borates have been characterized by temperature dependent synchrotron radiation X-ray powder diffraction, ab initio calculations, thermal analysis and infrared spectroscopy. Various solvated complexes containing six, four, three, two or one solvent molecules were obtained by successive removal of the solvent until in most case the solvent-free metal closo-borates were obtained with the exception of Mg whose hypothetical crystal structure, however, could have its prototype in MnB12H12. The 3d transition metal closo-borates were studied in the view of their potential use as Na- or Li-ion battery electrodes in combination with Na or Li closo-borate solid electrolytes. The metal oxidation state (II) obtained in compounds presented here does not allow such application.
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Liu, Jia-Yuan, Hai-Di Ma, Yan-bo Sun, Ying Li, Wei-Ming Sun, Di Wu y Zhi-Ru Li. "Hyperhalogen properties of early-transition-metal borates". RSC Adv. 7, n.º 74 (2017): 47073–82. http://dx.doi.org/10.1039/c7ra10238k.

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Akef Ibrahim Alhmaideen, Akef Ibrahim Alhmaideen, Hamzeh M. Abdel Halim Hamzeh M Abdel Halim y Assala A. Al Twal and Adnan S. Abu Surrah Assala A Al Twal and Adnan S Abu Surrah. "Synthesis of New Series of Transition Metal Complexes with Poly (Pyrazolyl) Borates". Journal of the chemical society of pakistan 45, n.º 4 (2023): 294. http://dx.doi.org/10.52568/001289/jcsp/45.04.2023.

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In structuring catalysis enzyme and chemistry, tridentate ligands and Scorpionate ligands are of significant worth. This study presents the synthesis of a tris(pyrazolyl)borate ligand to be utilized in transition metal complexes as possible redox shuttles. Complexes of general formula [AgTp], [MIIITp (Cl2)] (M = Fe, Co), Tp = tri (1-pyrazolyl) borohydride and [AgTp*], [FeIIITp*(Cl2)], Tp* = tris (3, 5-dimethyl-1-pyrazolyl) borohydride were synthesized and characterized in solid state. The Tp ligands were considered triply coordinated with the metal center with two bounded chloride atoms as per the information gathered from spectroscopic information. Entire preparations and operations were performed under argon using common Schlenk procedures. Elemental analysis was performed using (the EURO EA instrument). Thermolysis shows that the Tp ligand decomposes around 100oC and above 300oC for some complexes. The composites were simple to compose, yielded high yields, and were reasonably air sensitive. This study has examined the synthesis of a tris(pyrazolyl)borohydride ligand to develop an iron complex. Further studies conducting electrochemical tests should be carried out to demonstrate the effectiveness of this likely redox mediator.
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Pasqualini, Leonard C., Martina Tribus y Hubert Huppertz. "Expansion and adaptation of the M 5B12O25(OH) structure type to incorporate di- and trivalent transition metal cations". Zeitschrift für Naturforschung B 79, n.º 1 (1 de enero de 2024): 39–49. http://dx.doi.org/10.1515/znb-2023-0082.

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Abstract Five transition metal borates were synthesized in a Walker-type module under high-pressure/high-temperature conditions of 8–9 GPa and 800–1200 °C. They all exhibit the same interpenetrating, anionic borate network B12O26 16−, crystallizing in the space group I41/acd, and therefore show high similarities to the borates Ti5B12O26 and Ga5B12O25(OH). Cr5B12O25(OH) and V5B12O25(OH) are isotypic to Ga5B12O25(OH), whereas Mn5Mn0.83B12O26 and Fe5Fe0.14B12O24.3(OH)1.7 feature the partial occupation of an additional, cuboctahedral cavity in the structure. This is due to a partial reduction of the cations to the oxidation state +2, as presented with the novel compound Mn5MnB12O22(OH)4, which only features Mn2+ for charge compensation. These structures feature a twelvefold coordination of manganese and iron.
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Banerjee, Abhinandan y Robert W. J. Scott. "Optimization of transition metal nanoparticle-phosphonium ionic liquid composite catalytic systems for deep hydrogenation and hydrodeoxygenation reactions". Green Chemistry 17, n.º 3 (2015): 1597–604. http://dx.doi.org/10.1039/c4gc01716a.

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Balaev, A. D., N. B. Ivanova, N. V. Kazak, S. G. Ovchinnikov, V. V. Rudenko y V. M. Sosnin. "Magnetic anisotropy of the VBO3 and CrBO3 transition-metal borates". Physics of the Solid State 45, n.º 2 (febrero de 2003): 287–91. http://dx.doi.org/10.1134/1.1553533.

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Beckett, Michael A. "Recent advances in crystalline hydrated borates with non-metal or transition-metal complex cations". Coordination Chemistry Reviews 323 (septiembre de 2016): 2–14. http://dx.doi.org/10.1016/j.ccr.2015.12.012.

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Fehlhammer, Wolf Peter, Hans Hoffmeister, Borislav Boyadjiev y Thomas Kolrep. "Bor-stabilisierte Ν,Ο-Carbene, II Röntgenstrukturanalyse von (trans-4,5-Dimethyloxazolidin-2-yliden)triphenylbor und N-Alkyliengen / Boron Stabilized Ν,Ο-Carbenes, II X-Ray Structure of (trans-4,5-Dimethyloxazolidin-2-ylidene)triphenylboron and N-Alkylations". Zeitschrift für Naturforschung B 44, n.º 8 (1 de agosto de 1989): 917–22. http://dx.doi.org/10.1515/znb-1989-0810.

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The X-ray structure analysis of (trans-4,5-dimethyloxazolidin-2-ylidene)triphenylboron reveals a stereochemistry of the carbene ligand which is almost identical with that in transition metal complexes. Deprotonation of triphenylboron stabilized oxazolidin-2-ylidenes with NaH leads to (oxazolin-2-ato)borates, which have been N-alkylated with [R3O+][BF4~] or RI under mild conditions.
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Jiang, Xiaolin, Zijun Huang, Mohamed Makha, Chen-Xia Du, Dongmei Zhao, Fang Wang y Yuehui Li. "Tetracoordinate borates as catalysts for reductive formylation of amines with carbon dioxide". Green Chemistry 22, n.º 16 (2020): 5317–24. http://dx.doi.org/10.1039/d0gc01741h.

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The first example of borate-catalyzed N-formylation of amines using CO2 as the carbon source in the presence of hydrosilanes is demonstrated using sodium (trihydroxy)phenylborate as a transition metal-free catalyst.
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Tao, Liang, James R. Neilson, Brent C. Melot, Tyrel M. McQueen, Christian Masquelier y Gwenaëlle Rousse. "Magnetic Structures of LiMBO3 (M = Mn, Fe, Co) Lithiated Transition Metal Borates". Inorganic Chemistry 52, n.º 20 (2 de octubre de 2013): 11966–74. http://dx.doi.org/10.1021/ic401671m.

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Tesis sobre el tema "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.

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Knyrim, Johanna S. "Synthetic investigations into main group and transition metal borates at extreme conditions". kostenfrei, 2008. http://edoc.ub.uni-muenchen.de/9141/.

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Aboelenen, 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.

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Chettri, 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.

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Abbali, Zineb. "Etude de la cristallisation de ferrites spinelles dans des verres borates". Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb376110731.

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Merle, Nicolas. "Transition metal complexes of chelating phosphine boranes". Thesis, University of Bath, 2006. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426296.

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Abdi, 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.

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Etude de la corrosion du cuivre en milieu acide (perchlorique acide) et saline (borate de sodium) par des techniques electrochimiques. Influence des especes sulfures sur la cinetique de corrosion des electrodes tournantes en cuivre
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Silva, 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/.

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Vidros são materiais atraentes do ponto de vista científico e tecnológico, em especial porque algumas composições químicas permitem a fabricação em larga escala e/ou podem apresentar propriedades físico-químicas que os tornam candidatos promissores para aplicações como meio ativo para lasers, filtros ópticos, fibras ópticas, blindagens mecânicas ou como objeto de decoração ou utensílios domésticos ou como elemento para a construção civil, entre outras. Um dos desafios em preparar novas composições de materiais vítreos é garantir que não apareça o fenômeno da devitrificação. Este trabalho foi realizado com o objetivo de preparar e caracterizar uma nova matriz multicomponente, a base de óxido de boro, livre do fenômeno de cristalização. A matriz [50B2O3 - 15ZnO - 10PbO - 8MgO - 6K2O - 2Al2O3 - 2Nb2O5 - 5Si2O - 2Na2O] %wt pura e dopada com 0,1% mol de íons de metais de transição (MnO2, Fe2O3, CoO, NiO, CuO e CdCl2), foram preparadas em forno elétrico de atmosfera aberta usando cadinho de platina e caracterizadas usando as técnicas de: difração de raios X, análise térmica, densidade, pelo princípio de Arquimedes, microdureza Vickers, colorimetria, absorção óptica no intervalo ultravioleta-vísivel (UV-Vis) e transmissão óptica na região do infravermelho (FTIR). Resultados de difração de raios X confirmaram o caráter não cristalino das amostras vítreas. A adição de dopantes levou a mudança no número de coordenação na rede borato. Resultados de absorção óptica evidenciaram que a nova matriz desenvolvida com a adição de íons de metais de transição absorvem na região do visível e infravermelho próxima. Esses vidros tem potencial de aplicação na indústria de produtos decorativos e como filtros ópticos.
Glasses 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.
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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.

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Hallett, 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.

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Libros sobre el tema "Transition Metal Borates"

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Mirsaidov, U. Borogidridy perekhodnykh metallov. Dushanbe: Izd-vo "Donish", 1985.

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Capítulos de libros sobre el tema "Transition Metal Borates"

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Trofimenko, S., John R. Long, Thomas Nappier y Sheldon G. Shore. "Poly(1-pyrazolyl)borates, Their Transition-Metal Complexes, and Pyrazaboles". En Inorganic Syntheses, 99–109. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470132432.ch18.

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Amgoune, Abderrahmane, Ghenwa Bouhadir y Didier Bourissou. "Reactions of Phosphine-Boranes and Related Frustrated Lewis Pairs with Transition Metal Complexes". En Topics in Current Chemistry, 281–311. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/128_2012_370.

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Akbayrak, Serdar y Saim Özkar. "Hydrogen Generation from the Hydrolysis of Ammonia Borane Using Transition Metal Nanoparticles as Catalyst". En Hydrogen Production Technologies, 207–30. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119283676.ch5.

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Thomas, Simon D., Rosenildo C. Da Costa y Gareth R. Owen. "Transition metal complexes of borane and borohydride ligand architectures containing a single tethering supporting unit". En Organometallic Chemistry, 144–85. Cambridge: Royal Society of Chemistry, 2020. http://dx.doi.org/10.1039/9781788017077-00144.

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Housecraft, Catherine E. "Bonding schemes for transition metal clusters". En Metal-Metal Bonded Carbonyl Dimers and Clusters. Oxford University Press, 1996. http://dx.doi.org/10.1093/hesc/9780198558590.003.0003.

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This chapter deals with bonding schemes that treat polyhedral skeleton as a single unit or as an assembly of condensed units. These require a defined number of bonding electrons. It uses the isolobal principle to draw analogies between the transition of metal carbonyl and borane clusters. It also explores the application of the polyhedral skeletal electron pair theory (PSEPT) to metal carbonyl clusters, which provides a rationalization of geometry of the cluster core. The chapter mentions the Wade approach. This determines the number of electrons that a metal-based fragment provides for cluster bonding and rationalizes the structures of transition metal carbonyl clusters that are analogous of boranes and derived anions. It reviews condensed polyhedral structures that are prevalent amongst transition metal carbonyl clusters.
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Mondal, Bijan, Rosmita Borthakur y Sundargopal Ghosh. "Organometallic Chemistry and Catalysis of Transition Metal–Borane Compounds". En Handbook of Boron Science, 201–37. WORLD SCIENTIFIC (EUROPE), 2018. http://dx.doi.org/10.1142/9781786344656_0007.

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Actas de conferencias sobre el tema "Transition Metal Borates"

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Liu, Hui, Tiezhu Bo, Hua Cai, Jiao Lian, Dongzhan Zhou, Yu Shi, Chang Liu et al. "Study on properties of transition metal oxide borate glass". En Conference on Optical Sensing and Imaging Technology, editado por Dong Liu, Xiangang Luo, Yadong Jiang y Jin Lu. SPIE, 2020. http://dx.doi.org/10.1117/12.2580123.

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Nagaraja, N., J. Sangamesh, Chandrashekar, T. Sankarappa y J. S. Ashwajeeth. "Mixed conduction in Alkali and transition metal ion doped borate glasses". En 2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT). IEEE, 2016. http://dx.doi.org/10.1109/iceeot.2016.7754843.

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Laeri, F., G. Angelow, D. Hilgenberg, R. Jungen y J. Albers. "Photorefractive phase conjugation in the ultraviolet". En OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/oam.1991.mu4.

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Photorefractive materials for phase conjugation in the ultraviolet are studied. In the canonical understanding the photorefractive effect is due to crystal impurities. With doping of the UV-transparent crystals beta-barium-borate (BBO), lithium-tetra-borate (LTB), and potassium-dihydrogen-phosphate (KDP) with transition metals, photorefractive properties can be achieved. In nominally pure LTB pumped with 150 mW of the 364-nm cw argon-ion laser line, we already observed a phase-conjugate reflectivity of 0.15%.
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Sanjay, A. Kaushik, N. Kishore, A. Agarwal, I. Pal y R. Dhar. "Study of structural and optical properties of lead borate glasses containing transition metal ion". En SOLID STATE PHYSICS: Proceedings of the 56th DAE Solid State Physics Symposium 2011. AIP, 2012. http://dx.doi.org/10.1063/1.4710130.

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Khasa, S., Arti Yadav, M. S. Dahiya, Seema, Ashima y A. Agarwal. "Effect of mixed transition metal ions on DC conductivity in lithium bismuth borate glasses". En NANOFORUM 2014. AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4917877.

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Hirao, K. "Room Temperature Hole-Burning in Sm2+-doped Borate Glasses". En Spectral Hole-Burning and Related Spectroscopies: Science and Applications. Washington, D.C.: Optica Publishing Group, 1994. http://dx.doi.org/10.1364/shbs.1994.thg1.

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Recently, the interests in optical memory based on persistent spectral hole burning (PSHB) are increased because of its possibility of the application to high density optical memory. PSHB was observed for an organic dye doped in polymer and rear earth or transition metal doped in inorganic crystal or glasses up to now. Since PSHB was observed by two Russian groups (Gorokhovskii et al. and Kharlamov et al.) for free base phthalocyanine in a n-octane Shpol'skii matrix1 and for perylene and 9-aminoacridine molecules in glassy ethanol matrix2, PSHB materials are studied primarily for the polymer doped with an organic dye. But such materials can make hole only at very low temperature. Room temperature PSHB phenomena were observed on Sm2+ doped fluoride crystals3-5 and glasses6 recently, however these materials' Гih(inhomogeneous line width)/Гh(homogeneous line width)'s which are the parameters of data multiplicity in PSHB optical memory are an order of unity. For the application of PSHB materials to optical memory, high operating temperature, high Гih/Гh, and rapid reaction rate are wanted. Glass has a superiority on the view point of optical memory application because of its broad inhomogeneous line width and productivity. Our group has discovered room temperature PSHB for Sm2+ in borate glass systems whose Гih/Гh is 24.7 PSHB for rear earth metal in glass matrix has not been studied seriously, yet. It is thought that the study of the relationship between the optical hole and glass structure is necessary.
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Informes sobre el tema "Transition Metal Borates"

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Manna, Kuntal. Transition metal complexes of oxazolinylboranes and cyclopentadienyl-bis(oxazolinyl)borates: Catalysts for asymmetric olefin hydroamination and acceptorless alcohol decarbonylation. Office of Scientific and Technical Information (OSTI), diciembre de 2012. http://dx.doi.org/10.2172/1082975.

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Wilson, Bobby L. The Study of Some Early Transition Metals in Oxidation State IV Using the Potassium Poly(pyrazolyl)borates as Ligands. Fort Belvoir, VA: Defense Technical Information Center, octubre de 1985. http://dx.doi.org/10.21236/ada164074.

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