Dissertations / Theses on the topic 'Metal-oxo complexes'
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Green, G. "Transition metal oxo-complexes as organic oxidants." Thesis, Imperial College London, 1985. http://hdl.handle.net/10044/1/37711.
Full textShan, Hui. "New late transition metal oxo and hydrazido complexes /." free to MU campus, to others for purchase, 1998. http://wwwlib.umi.com/cr/mo/fullcit?p9924922.
Full textCecchini, Chiara. "Late Transition Metal-Oxo complexes: Synthesis, and Biorelevant Reactivity." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11249/.
Full textIbrahim, Masooma [Verfasser]. "Polynuclear Transition Metal-Oxo Complexes Stabilized by Heteropolytungstates / Masooma Ibrahim." Bremen : IRC-Library, Information Resource Center der Jacobs University Bremen, 2012. http://d-nb.info/1035217686/34.
Full text林曉楓 and Hiu-fung Lam. "Photophysical and photochemical properties of oxo and nitrido complexes of osmium(VI)." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B42576490.
Full textLam, Hiu-fung. "Photophysical and photochemical properties of oxo and nitrido complexes of osmium(VI)." Click to view the E-thesis via HKUTO, 2001. http://sunzi.lib.hku.hk/hkuto/record/B42576490.
Full textMiddleditch, Michael. "Towards a catalytic carbonyl olefination reaction using metal oxo complexes and ketenes." Thesis, University of Nottingham, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.430565.
Full textBroughton, Simon. "Progress toward a catalytic alkenation using transition metal alkylidene and oxo complexes." Thesis, University of Nottingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251978.
Full text鄧煒堂 and Wai-tong Tang. "Homogeneous oxidation of organic substrates by ruthenium, iron and manganese tertiary amine complexes." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1989. http://hub.hku.hk/bib/B31231706.
Full textTang, Wai-tong. "Homogeneous oxidation of organic substrates by ruthenium, iron and manganese tertiary amine complexes /." [Hong Kong : University of Hong Kong], 1989. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12355203.
Full textVanover, Eric. "Photochemical Oxidation Studies of Porphyrin Ruthenium Complexes." TopSCHOLAR®, 2012. http://digitalcommons.wku.edu/theses/1201.
Full textDucloiset, Clémence. "Etude de complexes pour les réactions par transfert d’atome d’oxygène ou d’azote : de la synthèse à la photoactivation." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS252/document.
Full textProcesses of oxidation and amination hold an important place on an industrial level but the current available methods are polluting and non-sustainable. To perform these transformations in the contour of green catalysis, bio-inspired oxygen atom transfer (OAT) and nitrogen atom transfer (NAT) reactions were addressed. In the case of OAT, the mechanism for the formation of the active species, the highly oxidized metal-oxo, is rather well described, and the challenge relies in the design of ligands to stabilize such species. For NAT, this step is less studied which limits the development of new catalysts. An even more challenging task resides in the use of light energy to generate these active species in the perspective to replace the classic oxidants. During this thesis, two projects have been undertaken. Firstly, the synthesis of dipyrrin based ligands and the corresponding ruthenium complex was evaluated for their ability to perform OAT reactions using conventional oxidants or the electrochemical way. Regarding the NAT reactions, we have investigated on the electrochemical, chemical and photochemical activation of the known catalyst Rh2(esp)2. Our strategy consisted in the activation of the nitrogen atom donor substrate, the sulfonamidate, in the coordination sphere of the catalyst. We disclose the spectroscopic signatures for the stepwise activation of the catalyst-substrate form. This work has as objective to set us on the path to develop a sustainable way to perform these reactions
Kwong, Ka Wai. "Visible-Light Generation of High-Valent Metal-Oxo Intermediates and a Biomimetic Oxidation Catalyzed By Manganese Porphyrins with Iodobenzene Diacetate." TopSCHOLAR®, 2016. http://digitalcommons.wku.edu/theses/1743.
Full textLi, Lin [Verfasser]. "Matrix Isolation and IR Spectroscopic Study on Late-Transition Fluorides, Metal Oxo Complexes and Actinide Halides / Lin Li." Berlin : Freie Universität Berlin, 2021. http://d-nb.info/1232726710/34.
Full textChambers, Matthew Burke. "Ligand field considerations for the reactivity of high valent metal-oxo complexes and of bimetallic HX splitting photocatalysts." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/82312.
Full textCataloged from PDF version of thesis.
Includes bibliographical references.
Inorganic molecular complexes are used to probe mechanistic steps in two reaction reactions related to energy storage. The first reaction considered is the O-O bond formation step required for water oxidation to oxygen. The second reaction considered is the photocatalytic generation of hydrogen and halogen from hydrohalic acid. Regarding the O-O bond formation process, terminal metal oxo complexes of pseudotetrahedral geometry were synthesized and studies focused on determining the electronic structure of these complexes as well as reactivity patterns. A novel series of low coordinate tris(alkoxide) complexes of divalent and trivalent metals were synthesized and characterized as single metal site models of oxidic metal clusters. Via oxygen atom transfer reactions, d⁰, d¹, and d² early transition metal-oxo complexes were stabilized. Analysis of structural parameters, infrared spectroscopy and DFT calculations establish that the first two d electrons fill degenerate [pi]* orbitals with respect to the M-O bond. An electronic structure was determined wherein there is a low lying degenerate dxz, dyz set of orbitals, a more destabilized degenerate set of dxy, dX2-y2 orbital, with dz2 as the most destabilized d orbital. Upon addition of oxygen atom transfer reagents to tris(alkoxide) divalent iron complexes, rapid C-H bond abstraction is observed to afford an Fe(III)-OH moiety. This rapid and indiscriminate nature in which this reaction proceeds is calculated to arise from the production of a terminal Fe(IV) oxo intermediate complex with a quintet spin state. The exceptionally weak ligand field orthogonal to the ferryl is proposed to stabilize a high spin state and promote the reactivity. Regarding HX splitting, a new dirhodium diphosphazane structure is evaluated for photocatalytic HX splitting behavior. The complex photoreduces protons but degrades quickly. Rational ligand modifications afford an indefinitely stable proton reduction photocatalyst. Upon proton reduction from hydrohalic acid, valence isomers of a tetrachloride product were isolated. The efficiencies of halide elimination from the valence symmetric and mixed valent complexes were determined to be similar. Calculations suggest that halogen elimination proceeds through a bridging halide structure and access to this structure is the determining factor for the efficiency of halogen elimination.
by Matthew Burke Chambers.
Ph.D.
Labonnette, Daniel. "Etude des especes du vanadium iv en milieu faiblement acide et alcalin : isopolyanions mixtes mo**(vi)-v**(iv), complexes carbonates de v**(iv)." Orléans, 1987. http://www.theses.fr/1987ORLE2009.
Full textHenry, Marc. "Application du concept d'electronegativite aux processus d'hydrolyse et de condensation en chimie minerale." Paris 6, 1988. http://www.theses.fr/1988PA066293.
Full textGiraudon, Jean-Marc. "Complexes mono et dinucléaires du molybdene avec les ligands macrocycliques : synthèse, structure, réactivité et propriétés redox." Brest, 1988. http://www.theses.fr/1988BRES2019.
Full textMeyer, Jonathan [Verfasser], and Gereon [Akademischer Betreuer] Niedner-Schatteburg. "Fragmentation and Infrared Spectroscopy of oxo-centered Homo- and Heterotrimetallic Carboxylate Bridged Transition Metal Complexes / Jonathan Meyer ; Betreuer: Gereon Niedner-Schatteburg." Kaiserslautern : Technische Universität Kaiserslautern, 2019. http://d-nb.info/1175950440/34.
Full textMeyer, Jonathan Ruben [Verfasser], and Gereon [Akademischer Betreuer] Niedner-Schatteburg. "Fragmentation and Infrared Spectroscopy of oxo-centered Homo- and Heterotrimetallic Carboxylate Bridged Transition Metal Complexes / Jonathan Meyer ; Betreuer: Gereon Niedner-Schatteburg." Kaiserslautern : Technische Universität Kaiserslautern, 2019. http://d-nb.info/1175950440/34.
Full textAyad, Massinissa. "Réactivité biomimétique du dioxygène au sein de complexes du fer et du cuivre en vue de l’activation des liaisons C-H." Thesis, Brest, 2017. http://www.theses.fr/2017BRES0054.
Full textCatalytic oxydation of C-H bonds using molecular oxygen as ‘green’ oxidant remains a great challenge from both fundamental and industrial point of views. Many metalloproteins, such as copper end iron-based mono-oxygenases are able to perform these reactions under mild conditions. A current strategy is to develop synthetic complexes which can reproduce the efficiency of such enzymes. The main objective of our work has been to synthesize and characterize new models of soluble (sMMO) and particulate (pMMO) mono-oxygenases. Two approaches have been developed. The first strategy was to synthesize unsymmetrical dinucleating ligands bearing two coordination sites, tris-(2-pyridylmethyl)amine “TPA” and pyridinedicarboxamide “PydCA”, which are embedded in a single macrocycle to favor intermetallic interaction. The second strategy is based on the synthesis of dinucleating ligands where coordinating patterns, tetraazacyclotetradecane “cyclam” and dipicolylamine “DPA”, are separated by a phenyl type spacer. These two approaches have led to the formation and characterization in the solid state (X-ray structure) and in solution (spectroscopy, electrochemistry) of many mononuclear and dinuclear iron, copper and cobalt complexes. The study of the reactivity of some mononuclear complexes towards oxidants such as O2 and H2O2, in absence of organic substrates, has led to the identification of metal-oxygen species. Catalytic oxidation of organic substrates was also conducted
Stewart, Peter John. "Metal-ligand multiply bonded complexes supported by amidinate ligands." Thesis, University of Nottingham, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243747.
Full textBenkada, Assma [Verfasser], Wolfgang [Akademischer Betreuer] Bensch, and Norbert [Gutachter] Stock. "Synthesis of Thiostannates, Oxo-Thiostannates and Tin-Sulfides Applying Transition Metal Complexes Containing Macrocyclic Amine Molecules : Development of new synthetic routes to synthesize Sn-S and S-Sn-O compounds and investigation of their properties / Assma Benkada ; Gutachter: Norbert Stock ; Betreuer: Wolfgang Bensch." Kiel : Universitätsbibliothek Kiel, 2020. http://d-nb.info/1222974169/34.
Full textHuang, Yan. "Synthesis, Kinetic and Photocatalytic Studies of Porphyrin-Ruthenium-Oxo Complexes." TopSCHOLAR®, 2010. http://digitalcommons.wku.edu/theses/182.
Full text張碧玉 and Pik-yuk Christine Cheung. "Crystal structure analysis of imido, nitrido and oxo complexes of rhenium (V), osmium (VI) and ruthenium (III) and some complexes oftrinuclear gold (I)." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1991. http://hub.hku.hk/bib/B31210211.
Full textCheung, Pik-yuk Christine. "Crystal structure analysis of imido, nitrido and oxo complexes of rhenium (V), osmium (VI) and ruthenium (III) and some complexes of trinuclear gold (I) /." [Hong Kong : University of Hong Kong], 1991. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13138327.
Full textDelony, Daniel. "Proton Coupled Electron Transfer at Heavy Metal Sites." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2020. http://hdl.handle.net/21.11130/00-1735-0000-0005-1546-5.
Full textJäger, Norbert. "Molekülmechanische und quantenchemische Berechnung der räumlichen und elektronischen Struktur von Vanadium(IV)- und Oxo-Rhenium(V)-Chelaten dreizähnig diacider Liganden." Phd thesis, Universität Potsdam, 1998. http://opus.kobv.de/ubp/volltexte/2005/154/.
Full textDer hier vorgestellte, kombinierte Algorithmus aus kraftfeldbasierter Geometrieoptimierung und single-point-Rechnung an diesen Strukturen ist ein zuverlässiger und relativ schneller Weg Molekülgeometrien von Metallkomplexen zu berechnen. Er kann somit zur Voraussagen von Komplexstrukturen und zur gezielten Modellierung definierter Koordinationsgeometrien verwendet werden.
In this work the molecular structures and the electronic properties of Vanadium(IV)- and Oxo-Rhenium(V)-chelates have been investigated to quantify steric and electronic effects of complexation. It has been shown, that in this way detailed insight can be gained into the bonding conditions of that metal complexes. Molecular mechanic calculations based on the Extensible Systematic Force Field (ESFF) and the Consistent Force Field 91 (CFF91) have been carried out. High flexibility and reliability of the rule based ESFF has been proven for a large variety of different metal chelates. Due to the poor ESFF-results for trigonal-prismatic complex geometries, a fit of the CFF91 for that species was done. Based on the theoretical results the alternative structure of isoelectronical vanadium(IV)- complexes have been calculated and a hypothesis on the reason for the structural differnces have been stated in accordance with experimental results, theoretical models of complex chemistry, and empirical facts. This combined approach of force field based geometry optimization and single point calculation at these structures has been proven to be a reliable and fast way to get molecular structures of metal complexes. It can be used to predict complex structures for modelling destinct coordination geometries.
Da, Re Ryan Edward. "Electronic spectra and structures of metal-oxo complexes /." 2002. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3039022.
Full text"Part I. Studies of octasubstituted Oxo(phthalocyaninato)titanium(IV) complexes: Part II. Dioxotungsten(VI) complexes with N2O2 and N2S2 tetradentate ligands." 1996. http://library.cuhk.edu.hk/record=b5889192.
Full textYear shown on spine: 1997.
The "2" in the title is subscript.
Thesis (M.Phil.)--Chinese University of Hong Kong, 1996.
Includes bibliographical references (leaves 103-110).
ACKNOWLEDGMENT --- p.i
CONTENTS --- p.ii
LIST OF FIGURES --- p.v
LIST OF TABLES --- p.vii
ABBREVIATIONS --- p.viii
ABSTRACT --- p.x
Chapter I. --- STUDIES OF OCTASUBSTITUTED OXO(PHTHALOCYANINATO) TITANIUM(IV) COMPLEXES
Chapter 1. --- INTRODUCTION --- p.2
Chapter 2. --- RESULTS AND DISCUSSION
Chapter 2.1. --- Preparation of Substituted Dicyanobenzenes and Dicyanonaphthalene --- p.9
Chapter 2.2. --- Synthesis of Octasubstituted Oxo(phthalocyaninato)titanium(IV) and (Naphthalocyaninato)oxotitanium(IV) Complexes --- p.12
Chapter 2.3. --- "Solvent Effects on the UV-Vis Absorption Spectra of (2,3,9,10,16, 17,23,24-Octaheptylphthalocyaninato)oxotitanium(IV)" --- p.27
Chapter 2.4. --- Aggregation of Octasubstituted Oxo(phthalocyaninato)titanium(IV) and (Naphthalocyaninato)oxotitanium(IV) Complexes --- p.29
Chapter 2.5. --- Electrochemical Studies of Octasubstituted Oxo(phthalocyaninato)- titanium(IV) and (Naphthalocyaninato)oxotitanium(IV) Complexes --- p.34
Chapter 2.6. --- Reactions of Disubstituted Dicyanobenzenes with Zirconium(IV) Butoxide and Urea --- p.39
Chapter 2.7. --- Conclusion --- p.40
Chapter 3. --- EXPERIMENTAL SECTION
Chapter 3.1. --- Materials --- p.42
Chapter 3.2. --- Physical Measurements --- p.42
Chapter 3.3. --- "Preparation of l,2-Dicyano-4,5-diheptylbenzene" --- p.43
Chapter 3.4. --- "Preparation of l,2-Dicyano-4,5-bis(pentyloxy)benzene" --- p.45
Chapter 3.5. --- "Preparation of l,2-Dicyano-4,5-bis(alkoxymethyl)benzene" --- p.47
Chapter 3.6. --- "Preparation of 3,6-Bis(butyloxy)-l,2-dicyanobenzene" --- p.49
Chapter 3.7. --- "Preparation of 2,3-Dicyano-5,8-dihexylnaphthalene" --- p.50
Chapter 3.8. --- Preparation of Octasubstituted Oxo(phthalocyaninato)titanium(IV) Complexes --- p.52
Chapter 3.9. --- Preparation of Octasubstituted (Naphthalocyaninato)oxotitanium(IV) Complex --- p.57
Chapter 3.10. --- Miscellaneous Syntheses --- p.58
Chapter II. --- dioxotungsten(vi) complexes with n202 and n2s2 tetradentate ligands
Chapter 1. --- INTRODUCTION --- p.62
Chapter 2. --- RESULTS AND DISCUSSION
Chapter 2.1. --- Preparation of Tetradentate Ligands --- p.75
Chapter 2.2. --- Preparation of Dioxotungsten(VI) Complexes --- p.78
Chapter 2.3. --- Electrochemical Studies of Dioxotungsten(VI) Complexes --- p.86
Chapter 2.4. --- Oxo-transfer Properties of Dioxotungsten(VI) Complexes --- p.91
Chapter 2.5. --- Conclusion --- p.94
Chapter 3. --- EXPERIMENTAL SECTION
Chapter 3.1. --- Materials --- p.95
Chapter 3.2. --- Physical Measurements --- p.95
Chapter 3.3. --- Preparation of Tetradentate Ligands --- p.96
Chapter 3.4. --- Preparation of Dioxotungsten(VI) Complexes --- p.100
REFERENCES --- p.103
APPENDIX A lH NMR spectra of Pc'TiOs --- p.111
APPENDIX B 13C{1H} NMR spectra of octasubstituted PcTi compounds --- p.113
APPENDIX C Mass spectra of octasubstituted PcTi and PcZr compounds --- p.118
"APPENDIX D IR spectra of octasubstituted PcTi, NcTi and PcZr compounds" --- p.124
APPENDIX E Cyclic voltammograms of octasubstituted PcTiOs and NcTiO --- p.131
APPENDIX F Determination of aggregation number (n) and aggregation constant (K) --- p.136
APPENDIX G 1H NMR spectra of dioxotungsten(VI) complexes --- p.138
APPENDIX H 13C{1H} NMR spectra of dioxotungsten(VI) complexes --- p.140
APPENDIX I LSI mass spectra of dioxotungsten(VI) complexes --- p.143
APPENDIX J IR spectra of dioxotungsten(VI) complexes --- p.147
APPENDIX K Crystallographic data of W02(L2-N202) (64) --- p.150
APPENDIX L Kinetic data for the oxo-transfer reactions --- p.160
Lay, Nien-Sheng, and 賴年盛. "Intermetal Oxo Transter :Isomerization of Mixed-Metal W-Re Car- bonyl, Complexes with Oxo and Acetylide Ligands." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/36410939292605689553.
Full textKhownium, Kriangsak. "Direct atom transfer vs. ring expansion in reaction of rhenium oxo complexes with cyclooctene epoxides and episulfides." Thesis, 2003. http://hdl.handle.net/1957/29849.
Full text