Дисертації з теми "Alkaline Earth Metal hydrides"
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Santoru, Antonio [Verfasser]. "Insights into the structure and reaction mechanism of alkali and alkaline-earth metal amide-metal hydride composite systems for hydrogen storage / Antonio Santoru." Hamburg : Helmut-Schmidt-Universität, Bibliothek, 2018. http://d-nb.info/1162510706/34.
Повний текст джерелаVerbraeken, Maarten Christiaan. "Doped alkaline earth (nitride) hydrides." Thesis, St Andrews, 2009. http://hdl.handle.net/10023/714.
Повний текст джерелаTreuil-Dussouet, Félix. "Photoconductivity in rare earth metal-oxy-hydrides." Thesis, Uppsala universitet, Materialteori, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-416695.
Повний текст джерелаPianalto, Frederick Scott 1961. "Laser spectroscopy of strontium-sulfide and alkaline earth monoborohydrides." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276739.
Повний текст джерелаBlake, Matthew Paul. "Alkaline earth- and rare earth-transition metal complexes." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:d14f9c15-ec66-4317-82df-04d6ba1d4899.
Повний текст джерелаHuadsai, Wimonsiri. "Activation du dioxyde de carbone par des composés de Lewis hautement acidés." Electronic Thesis or Diss., Université de Toulouse (2023-....), 2024. http://www.theses.fr/2024TLSES053.
Повний текст джерелаThis research aimed to investigate the potential applications of Mg and Ca hydride complexes supported by ß-diketiminate and amidinate ligands for the reduction of CO2 molecules. The catalytic abilities of these complexes were explored in the context of hydroboration and hydrosilylation of CO2. In the first part of the study, we examined the reactivity of ß-diketiminato Mg and Ca hydrides with CO2. It was observed that the Mg hydride complex rapidly incorporated CO2, leading to the formation of various intermediates with different nuclearities. This involved the insertion of Mg—H bond into CO2, resulting in the generation of formate moieties. Under heat, hexameric formate complexes were formed through a "ligand flip" mechanism, releasing steric hindrances around the metal centers. For Ca hydride and CO2 reactions, in situ NMR analysis was mainly conducted. Additionally, a novel Mg amidinate dihydride complex was successfully synthesized and reacted with CO2 to yield a unique single product of dimeric formate Mg complex, in contrast to the ß-diketiminate scaffold, where several formate species were detected. The second part of the research focused on the catalytic hydroboration of CO2 using alkaline-earth hydride complexes. In particular, the Ca-based system demonstrated high efficiency in the production of the four-electron reduction of CO2 or BBA product. This was the first example of using Mg and Ca hydride compounds to catalyze the hydroboration of CO2, selectively producing the BBA product. The in situ generated BBA was further used as a methylene transfer reagent in condensation reactions with thiols, resulting in the formation of novel stable hemithioacetal [RS—CH2—OBR2] compounds under mild and neutral conditions. Activation of the hemithioacetal compounds was achieved under acidic conditions, leading to the formation of dithioacetals and hemithioaminals. The condensation of the second OBR2 fragment with secondary amines, which act as stronger nucleophiles, resulted in the generation of aryl methyl sulfides [RS—CH2—NR2]. In the final section, we investigated the tandem hydrosilylation of CO2 using various hydrosilanes in combination with [Ae]-based hydride complexes and Lewis acid B(C6F5)3 as catalysts. This research expanded on previous studies of Mg-mediated hydrosilylation of CO2 and introduced the first example of Ca-catalyzed CO2 hydrosilylation with hydrosilanes. The effectiveness of reducing CO2 to CH4 or bis(silyl)acetal [H2C(Ph3SiO)2] or BSA depended on the nature of the silanes and the steric hindrances around the substrate Si—H bond. The choice of [Ae] catalyst also significantly influenced the overall reaction rate. Furthermore, Eyring and Arrhenius analyses provided insight into the activation parameters for reducing CO2 by certain catalysts, revealing that this reaction is primarily governed by an entropic contribution. In summary, this research has demonstrated the reactivity of Mg and Ca hydride complexes for CO2 reduction and explored their applications in hydroboration and hydrosilylation reactions. Future investigations may explore mechanistic possibilities, kinetic differences, and the reactivity of group 2 metal hydride complexes with carbon monoxide for CO homologation
Rees, David Alan. "Synthesis of alkaline earth transition metal sulfides." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311775.
Повний текст джерелаLiang, Tao. "Chiral Phosphoric Acids and Alkaline Earth Metal Phosphates Chemistry." Thesis, University of South Florida, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3632228.
Повний текст джерелаAsymmetric synthesis and catalysis is one of the leading research areas in chemistry society, for its versatility and efficiency in obtaining chiral molecules that found the vast majority in natural active compounds and synthetic drugs. Developing asymmetric catalytic methodology is at the frontier in both industrial and academic research laboratories. Enantioselective organocatalysis has emerged as a powerful synthetic tool that is complementary to metal-catalyzed transformations. The development of chiral phosphoric acid and metal phosphate as catalysts has been a breakthrough in recent years. Chiral phosphoric acids have been shown to be powerful catalysts in many organic transformations. Moreover, chiral metal phosphates, which formed by simply replacing the proton in phosphoric acid with metals, have introduced new catalytic activations and broaden the scope of phosphoric acids. This thesis details new highly enantioselective chiral phosphoric acid-catalyzed Pinacol rearrangement and robust alkaline phosphates catalytic system, which utilizes novel carbonyl activation.
The Pinacol rearrangement has long been known to be difficult to control in terms of regioselectivity and stereoselectivity. The initial studies found that indolyl-diol compounds can be treated with chiral phosphoric acids to afford the Pinacol rearrangement with high regio- and enantioselectivity. Over 16 chiral phosphoric acids were screened, and it was found an H8-BINOL-phosphoric acid variant with 1-naphthyl groups at 3 and 3' position was the excellent catalyst. This asymmetric transformation is tolerant toward variety of substituents both on the indole ring and migrating groups.
During the study, it was found that different ways to generate the catalyst had critical effect on this catalytic transformation. Only those phosphoric acids washed with HCl after column chromatography afforded the rearrangement products with high enantioselectivity. And those without treating with HCl were found contaminated by alkaline metals. These "contamination" catalysts were also found active with carbonyl activations.
A highly enantioselective catalytic hetero-Diels-Alder reaction of alpha-keto esters has been developed with chiral alkaline metal phosphates. A calcium 1-naphthyl-BINOL phosphate was found to be the optimum catalyst. A large range of alpha-keto esters as well as isatins can be applied in this alkaline phosphates catalytic system with high efficiency and selectivity. The structure of the catalyst is detailed for the first time by X-ray crystal structure analysis. A proposed Transition state model is provided based on the catalyst crystal structure and Raman spectroscopy analysis.
This methodology was further developed with an asymmetric Mukaiyama-Michael addition of beta,gamma-unsaturated alpha-keto ester. The best catalyst was found to be a magnesium chiral phosphate. And the transformation was found capable of tolerating a wide variety of beta,gamma-unsaturated alpha-keto esters.
Hamdy, Louise. "Developing new hydrogen bonded alkaline earth metal-organic complexes." Thesis, University of Bath, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.675739.
Повний текст джерелаGillett-Kunnath, Miriam M. "Heavy alkaline earth metal amides: Synthetic and structural investigations." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2008. http://wwwlib.umi.com/cr/syr/main.
Повний текст джерелаHitzbleck, Julia Ruhlandt-Senge Karin. "Syntheses and structural survey of novel alkaline earth and rare earth metal complexes." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2004. http://wwwlib.umi.com/cr/syr/main.
Повний текст джерелаVargas, Gregory Wilda Ruhlandt-Senge Karin. "Nitrogen-based alkaline earth metal compounds syntheses, structures and applications /." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2004. http://wwwlib.umi.com/cr/syr/main.
Повний текст джерелаReid, Stephanie. "Heavier alkaline earth metal catalysis and application to organic synthesis." Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/61488.
Повний текст джерелаBradwell, David (David Johnathon). "Liquid metal batteries : ambipolar electrolysis and alkaline earth electroalloying cells." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/62741.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. 198-206).
Three novel forms of liquid metal batteries were conceived, studied, and operated, and their suitability for grid-scale energy storage applications was evaluated. A ZnlITe ambipolar electrolysis cell comprising ZnTe dissolved in molten ZnCl 2 at 500 0C was first investigated by two- and three-electrode electrochemical analysis techniques. The electrochemical behavior of the melt, thermodynamic properties, and kinetic properties were evaluated. A single cell battery was constructed, demonstrating for the first time the simultaneous extraction of two different liquid metals onto electrodes of opposite polarity. Although a low open circuit voltage and high material costs make this approach unsuitable for the intended application, it was found that this electrochemical phenomenon could be utilized in a new recycling process for bimetallic semiconductors. A second type of liquid metal battery was investigated that utilized the potential difference generated by metal alloys of different compositions. MgjlSb cells of this nature were operated at 700 °C, demonstrating that liquid Sb can serve as a positive electrode. Ca,MgIIBi cells also of this nature were studied and a Ca,Mg liquid alloy was successfully used as the negative electrode, permitting the use of Ca as the electroactive species. Thermodynamic and battery performance results suggest that Ca,MgIISb cells have the potential to achieve a sufficient cell voltage, utilize earth abundant materials, and meet the demanding cost and cycle-life requirements for use in grid-scale energy storage applications.
by David J. Bradwell.
Ph.D.
Kumar, R. "Synthesis and molecular catalysis with organo- alkaline earth metal complexes." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2022. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/6167.
Повний текст джерелаBezougli, Izoldi P. "Insertion reactions of Group 2 metal alkoxides." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.484172.
Повний текст джерелаRobinson, Alex Lockwood. "Sonoluminescence for the quantitative analysis of alkali and alkaline earth chlorides /." Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/8687.
Повний текст джерелаSánchez, José Adán Reyes. "Synthesis and reactivity of alkaline earth and aluminium gallyl complexes." Thesis, University of Oxford, 2018. http://ora.ox.ac.uk/objects/uuid:5bf3dc4e-9cd6-4080-8f5f-9097e84ba12b.
Повний текст джерелаJones, Sally Anne. "Alkali and alkaline earth metal fluoride mediated aromoatic halogen exchange reactions." Thesis, University of Liverpool, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367085.
Повний текст джерелаNimmagadda, Sri Krishna. "Asymmetric Transformations Catalyzed By Chiral BINOL Alkaline Earth Metal Phosphate Complexes." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6554.
Повний текст джерелаEkvall, Katrin. "Time resolved laser spectroscopy : non-linear polarisation studies in condensed phase and lifetime studies of alkaline earth hydrides /." Stockholm, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3063.
Повний текст джерелаWitherow, Rebecca A. "Minor Alkaline Earth Element and Alkali Metal Behavior in Closed-Basin Lakes." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1250628213.
Повний текст джерелаHill, Matthew Roland Chemistry Faculty of Science UNSW. "The single source chemical vapour deposition of alkaline earth metal oxide thin films." Awarded by:University of New South Wales. School of Chemistry, 2006. http://handle.unsw.edu.au/1959.4/32903.
Повний текст джерелаDemydov, Dmytro V. "Nanosized alkaline earth metal titanates : effects of size on photocatalytic and dielectric properties." Diss., Manhattan, Kan. : Kansas State University, 2006. http://hdl.handle.net/2097/177.
Повний текст джерелаDavidson, Matthew Gwilym. "Alkali and alkaline earth metal complexes of multifunctional amines : syntheses, structures and uses." Thesis, University of Cambridge, 1994. https://www.repository.cam.ac.uk/handle/1810/272659.
Повний текст джерелаFrankland, Andrew D. "Studies on organic compounds of the group II metals Ca, Sr and Ba." Thesis, University of Sussex, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336274.
Повний текст джерелаSobaczynski, Adam [Verfasser], and Rhett [Akademischer Betreuer] Kempe. "Alkane Elimination Reactions between Transition Metal Hydrides and Rare-Earth Alkyls / Adam Sobaczynski. Betreuer: Rhett Kempe." Bayreuth : Universität Bayreuth, 2014. http://d-nb.info/1060010151/34.
Повний текст джерелаYadav, S. "Preparation of well-defined alkaline earth metal complexes and their applications in molecular catalysis." Thesis(Ph.D.), CSIR National Chemical Laboratory, Pune, 2019. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/4572.
Повний текст джерелаTulyapitak, Tulyapong. "CURE AND MECHANICAL PROPERTIES OF CARBOXYLATED NITRILE RUBBER (XNBR) VULCANIZED BY ALKALINE EARTH METAL COMPOUNDS." University of Akron / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=akron1158067153.
Повний текст джерелаFleming, Kathleen. "The Gas-Phase Ligand Exchange of Select Alkaline Earth and Transition Metal ß-diketonate Complexes." Youngstown State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1465062889.
Повний текст джерелаZuniga, Maria Felisa A. "Progress in molecular heterobimetallic alkaline earth metal chemistry New synthetic strategies, structural features and properties /." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2008. http://wwwlib.umi.com/cr/syr/main.
Повний текст джерелаChen, Chun-che. "Correlation between electrical and magnetic properties in alkali and alkaline earth metal doped lanthanum manganites /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.
Повний текст джерелаXiao, Xingxing [Verfasser], Anke [Akademischer Betreuer] Weidenkaff, and Rainer [Akademischer Betreuer] Niewa. "Thermoelectric Properties of Alkaline Earth Metal Substituted Europium Titanates / Xingxing Xiao ; Anke Weidenkaff, Rainer Niewa." Darmstadt : Universitäts- und Landesbibliothek, 2021. http://d-nb.info/1225865751/34.
Повний текст джерелаDiteepeng, Nichabhat. "Alkaline earth hydroborate complexes for the ring-opening polymerisation of cyclic esters." Thesis, University of Oxford, 2018. http://ora.ox.ac.uk/objects/uuid:d5b45f1c-b8a9-41da-a967-7f569b69aa35.
Повний текст джерелаSturgeon, Matthew Robert. "Cyanide Bridged Multimetallics Derived From Extended Arrays of Alkaline Earth, Rare Earth, and Transition Metals: A Study From Complexes To Catalysts." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1250009077.
Повний текст джерелаO'Brien, Anna Yosick. "Advances in the design of heavy alkaline earth metal complexes as precursors for chemical vapor deposition." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2005. http://wwwlib.umi.com/cr/syr/main.
Повний текст джерелаVilayannur, Sitaraman. "Fundamental mechanisms of oxidation of alkaline earth bearing metal precursors : Y-Ba-Cu-Ag-Pd and Ag?Ba /." The Ohio State University, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488193272067643.
Повний текст джерелаPotratz, Christopher M. "The Synthesis, Structure and Characterization of Extended Cobalt Ruthenium Carbonyl Compounds." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1275413923.
Повний текст джерелаTeng, Weijie Ruhlandt-Senge Karin. "From polymerization initiators to precursors for solid-state materials syntheses and structures of a series of molecular alkali and alkaline earth metal derivatives /." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2004. http://wwwlib.umi.com/cr/syr/main.
Повний текст джерелаSiggelkow, Lisa [Verfasser], Thomas F. [Akademischer Betreuer] Fässler, and Wolfgang [Akademischer Betreuer] Domcke. "Synthesis, Characterization and Computational Studies of Binary and Ternary Intermetallic Compounds in the Systems Alkaline Earth Metal, Transition Metal, Tetrel Element / Lisa Siggelkow. Gutachter: Wolfgang Domcke. Betreuer: Thomas F. Fässler." München : Universitätsbibliothek der TU München, 2011. http://d-nb.info/1029350175/34.
Повний текст джерелаBallmann, Gerd [Verfasser], Sjoerd [Akademischer Betreuer] Harder, Romano [Gutachter] Dorta, and Norbert [Gutachter] Jux. "Encapsulating Dipyrromethene Ligands for the Stabilization of Low-Coordinate Alkaline Earth and Zinc Metal Complexes / Gerd Ballmann ; Gutachter: Romano Dorta, Norbert Jux ; Betreuer: Sjoerd Harder." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2019. http://d-nb.info/1202608477/34.
Повний текст джерелаMarchuk, Alexey [Verfasser], and Wolfgang [Akademischer Betreuer] Schnick. "Mineralizer-assisted high-pressure high-temperature synthesis and characterization of novel phosphorus nitride imides and luminescent alkaline earth metal (oxo)nitridophosphates / Alexey Marchuk. Betreuer: Wolfgang Schnick." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2016. http://d-nb.info/1098130766/34.
Повний текст джерелаMargadonna, Sarena. "Fulleride salts : from polymers to superconductors." Thesis, University of Sussex, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323048.
Повний текст джерелаGagné, Olivier C. "Bond lengths and bond valences of ions bonded to oxygen: their variability in inorganic crystals." Acta Crystallographica B, 2015. http://hdl.handle.net/1993/31697.
Повний текст джерелаOctober 2016
Köhne, Ingo. "Novel Bulky Bis(benzoxazol-2-yl)methane Ligands in s-Block Metal Coordination." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2018. http://hdl.handle.net/11858/00-1735-0000-002E-E3E8-1.
Повний текст джерелаBarbosa, Helliomar Pereira. "Síntese e estudo da luminescência de matrizes de tungstatos dopadas com íons terras raras." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/46/46136/tde-22102013-110137/.
Повний текст джерелаLuminescent materials containing rare earth ions (RE3 +) doped in [WO4]2- tungstate matrices have demonstrated excellent candidates as phosphors. Therefore, in this work the materials MWO4:TR3+ (M: Ca2+, Sr2+, Ba2+ e TR3+: Eu, Tb) were prepared by the coprecipitation method with doping concentration 0.1, 1.0, 5.0 and 10% mol. This method compared to conventional ones (ceramic, combustion, etc.), has advantages because it is a simple operation and fast, low cost, prepared at room temperature, the process of obtaining is environmentally correct and also make up the nanoparticles. The characterization techniques of these phosphors were investigated by infrared absorption spectroscopy (IR), thermogravimetric analysis (TG), X-ray diffraction patterns - powder method (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray (EDS). The tungstate matrices doped with Eu3+ and Tb3+ showed crystallite sizes with nanometer dimensions. The rare earth oxidation states were investigated using absorption spectroscopy X-ray synchrotron radiation (XANES), which indicated the presence of only trivalent europium state materials \"as prepared\" and calcined. However, it was observed the trivalent and tetravalent state of terbium doped in CaWO4 and BaWO4 matrices, calcined at 500 º C. The photoluminescent properties of the compounds were investigated based on 4f6 (Eu3+) and 4f8 (Tb3+) intraconfigurational transitions. The excitation spectra showed broad bands in the UV region, assigned to the bands of charge transfer LMCT O→W e O→Eu3+. The excitation spectra of MWO4Tb3+ phosphors showed the broad absorption bands attributed charge transfer LMCT O2-(2p)→W6+(5d) overlapping with 4f8→4f75d transitions and narrow peaks arising from 4f8 transitions of Tb3+ ion. Moreover, their emission spectra exhibited narrow characteristic bands assigned to the 5D4→7FJ transitions of trivalent terbium ion. The high values of experimental intensity parameters (Ω2 ~ 18 x 10-20 cm2) indicate that the site symmetry occupied by the Eu3+ ion doped in the tungstates matrix not present centrosymmetric character, since high values of Ω2 are more affected by small angular changes of the local geometry around of rare earth ion. The values of emission quantum efficiencies (η) of the 5D0 level MWO4:Eu3+ phosphors were at around 30%, suggesting that there is no significant variation when changing the alkaline earth metal ions. The CIE coordinates (Commission Internationale l\'Eclairage) data suggest multicolored emissions for the MWO4:Eu3+ X mol-% systems can be tuneable, which depending on the emission intensities of the LMCT broad bands and 5D0→7F0-4 narrow peaks and concentration doping (X mol-%) of the Eu3+ ion. These materials exhibit luminescent emissions with red, green and intermediate colors.
Ganesan, Parameshwari. "Investigation of Luminescent Properties in Rare-Earth free Metallophosphonate Hybrid Materials : structural Insights in photophysical studies." Electronic Thesis or Diss., Normandie, 2023. http://www.theses.fr/2023NORMC266.
Повний текст джерелаThis thesis work systematically investigates the structural and photophysical properties of rare-earth-free metallophosphonate hybrid luminescent materials, emphasizing the role of structure in luminescent properties. Metallophosphonates demonstrate exceptional versatility with their coordination chemistry, highlighted by their ability to interact with multiple metal centers and form robust P-O-M metal bonds. We aim to study crystalline organic-inorganic hybrid luminescent materials in which the organic part provides a rigid platform which is easily modifiable with various functional groups. we present various metallophosphonate hybrids synthesized through the hydrothermal route using functionalized organic ligands such as Fluorene, Thianthrene, and Tetraphenylethylene (TPE) phosphonic acid with different alkaline-earth elements (Mg, Ca, Sr, Ba) and transition elements (Mn, Co, Cu, Zn). Different metallophosphonate materials are obtained by manipulating the nature of molecules, the number of functional groups, and the characteristics of cations in the structure. Due to that, the synthesized metallophosphonate hybrid materials exhibit diverse structural properties, including rigidity, thermal stability, and different arrangements like face-to-face or edge-to-face and herringbone stacking patterns. Furthermore, these materials display intriguing luminescent properties, such as Fluorescence, Room Temperature Phosphorescence (RTP), Bathochromic and Hypsochromic shift (red and blue shift), Excimer emission, and other novel green and red luminescence bands, particularly in the presence of specific cations. Lastly, we discuss and explore the interconnection between structural and physical properties including the phenomena of Aggregation Induced Emission (AIE) and Aggregation Enhanced Emission (AEE) for hybrid compounds
Seyyidoglu, Semih. "High Temperature Chemistry Of Some Borophosphates, Phase Relations And Structural Studies." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1045863/index.pdf.
Повний текст джерела#8594
2MIIO.MIVO2.B2O3.P2O5 + 4NH3 + 3H2O + 2CO2 (According to IUPAC formulation for the compounds composed of oxides) In the case of MIV=Zr4+ and MII=Sr2+, the formation of ZrSr[BPO7] was observed together with ZrO2 and SrBPO5. The formation of a new phase was proved by indexing the XRD pattern of the product after separating ZrO2 and SrBPO5 lines. Its crystal system was found to be orthorhombic and the unit cell parameters are a=11.85Å
, b=12.99 Å
, c=17.32 Å
. IR analysis shows that there is [BPO7]6- bands in the spectrum. At higher temperatures, Sr7Zr(PO4)6 was obtained. In the case of MIV=Si4+, SrBPO5 was the main product together with unreacted SiO2. At 1100 oC, Si4+ entered SrBPO5 structure and the product was indexed in orthorhombic system with a=8.9243 Å
, b=13.1548 Å
, and c=5.4036 Å
. Several other M:B:P ratios were tried for solid state systems. For compositions with different cations (such as Al3+, Ca2+, Na+), reactions generally pass through metal phosphates and BPO4. The X-ray diffraction powder pattern and infrared spectrum of several intermediate products obtained at different temperatures were presented and the several phase relations were investigated. The DTA and EDX analyses of some products were also reported.
Castillo, Rodrigo. "Synthesis of silicon- and germanium-rich phases at high-pressure conditions." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-207708.
Повний текст джерелаMalki, Mustapha. "Proprietes structurales, magnetiques et electroniques d'oxydes ternaires de terres-rares." Université Louis Pasteur (Strasbourg) (1971-2008), 1987. http://www.theses.fr/1987STR13143.
Повний текст джерела