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Dissertations / Theses on the topic 'Monovalent complexes'

Author: Grafiati

Published: 5 June 2025

Last updated: 24 June 2025

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1

Stephens, Ashley. "Cryptates and pendant arm ligand complexes /." Title page, contents and abstract only, 1994. http://web4.library.adelaide.edu.au/theses/09PH/09phs832.pdf.

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2

Clarke, Philip. "A study of cryptate complexes and pendant arm ligand complexes /." Title page, contents and abstract only, 1992. http://web4.library.adelaide.edu.au/theses/09PH/09phc5988.pdf.

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3

Kamras, Brian Leon. "Application-Focused Investigation of Monovalent Metal Complexes for Nanoparticle Synthesis." Thesis, University of North Texas, 2019. https://digital.library.unt.edu/ark:/67531/metadc1538771/.

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Over the last 20 years, there has occurred an increase in the number, scope, and impact of nanomaterials projects. By leveraging the Surface Plasmon Resonance of metallic nanoparticles for labelling, sensing, and treatment, researchers have demonstrated the versatile utility of these nanomaterials in medicine. The literature provides evidence of use of simple, well-known chemistry for nanomaterials synthesis when the focus is new applications of nanomaterials. A case in point, is the synthesis of metallic nanoparticles, whereby HAuCl4, CuCl2, Cu(acac)2, and AgNO3 are typically employed as nanoparticle precursors. Unfortunately, the use of these precursors limits the number of applications available to these materials - particularly for AuNPs in medicine, where the byproducts of nanoparticle synthesis (most often surface-adsorbed reductants, toxic stabilizers, and growth directors) cause nanoparticles to fail clinical trials. Despite the several thousand publications detailing the advancements in nanoparticle therapeutics, as of 2017, there were only 50 FDA-approved nanoparticle formulations. Less than 10 were based on metallic nanoparticles. This is a problem because many of these nanoparticle therapeutics demonstrate potent cell killing ability and labeling of cells. A solution to this problem may be the use of weakly coordinated, monovalent metal complexes, which require only one electron to reduce them to their metallic state. Further, by designing nanoparticle syntheses around these monovalent complexes, we can employ weaker, environmentally friendly stabilizers. This strategy also forgoes the use of exogenous reducing agents, because the monovalent complexes can be reduced and stabilized by one reagent. Herein we investigate the use of Au(Me2S)Cl, [Cu(MeCN)4]BF4, and AgBF4 with green stabilizers to synthesize a variety of nanomaterials. We find that a range of sizes of spherical particles, as well as a range of sizes of gold triangular prisms can be synthesized by using techniques that follow this strategy.

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4

HajiAli, Afzali Saba. "Reactivity of Chromium with Aluminates: The Quest for Monovalent Chromium Complexes." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/26078.

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Progress in catalytic ethylene oligmerization and polymerization processes creates an enormously valuable and active field in both industry and academic perspective. From the naive point of view, gathering ethylene molecules to generate carbon carbon bonds can be assumed as the no electron, no energy and facile chemical process which results from interaction of several π-electrons but this process never can afford macro- and micromolecule without applying catalysts. It is no wonder that major efforts have been committed to designing novel catalysts to perform poly- and oligomerization processes, both recently and in the past which provide the extensive library of catalysts today. Among all the metals applied in preparation of homogeneous catalysts for ethylene oligo- and polymerization, chromium has been ideal in providing versatile systems in terms of selectivity and activity for oligomer and polymer productions. In the first part of the current work we chose two different ligand systems (iminopyridine and bisiminophosphine) to investigate the activity of their chromium complexes for ethylene oligmerization and polymerization at different conditions. In addition we took on the substantial challenge of explaining the activities through isolation of intermediates during the catalytic runs. The major focus in this part was rationalizing catalytic behaviour of the catalysts through elucidation of metal oxidation state. To fulfill this goal, syntheses of chromium-aluminate complexes in different valence states as well as description ligand-metal interactions were presented. In the second part of this thesis, our mainly focus of study was on the development in the well- established field of radical chemistry of alkylaluminum. Preferential cation radical and diradical formation and exploring their stabilities through both experimental and computational methods will be discussed. Also continuation of this work led us to report unprecedented double alkylation on the ligand system.

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5

Harris, Lauren Michelle. "Photophysical Properties of Binuclear and Trinuclear Monovalent Coinage Metal Complexes for Applications in Molecular Devices." Thesis, University of North Texas, 2020. https://digital.library.unt.edu/ark:/67531/metadc1703352/.

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Monovalent coinage metal complexes have been of significant interest due to their rich photophysical properties. This dissertation focuses on the design, synthesis, and characterization of gold, silver, and copper phosphors. Chapter 2 investigates new physical and photophysical properties of a gold diphosphine dimer in the solid state. Thermally activated luminescence switching between two structural states is discussed. Chapter 3 includes the photochemistry of closed shell group 11 transition metals with dithiophosphonate and diphosphine ligands as heteroleptic, homoleptic and heterometallic systems. Chapter 4 reports the synthesis and characterization of a cyclic trinuclear gold imidazolate complex with high electron dentistry and π- base properties. The trinuclear gold (I) complexes reactivity with silver(I) and sodium cations is explored. The photochemistry of all complexes are screened for efficiency, emission profiles and lifetimes as potential materials to be used in OLEDs and other molecular devices.

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6

Weeks, Jennifer Megan. "A structural thermodynamic and equilibrium study of chiral pendant arm triaza macrocyclic ligand complexes: towards the formation of metal-ion activated molecular receptors : a thesis submitted for the degree of Doctor of Philosophy at the University of Adelaide (Faculty of Science) /." Title page, table of contents and abstract only, 2000. http://web4.library.adelaide.edu.au/theses/09PH/09phw395.pdf.

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7

Marzak, Saïd. "Complexes du cuivre (i) construits sur le fragment (ms::(4))**(2-) (m=mo,w) : role du ligand thiocyanate dans l'edification de composes heterometalliques a structure infinie." Paris 6, 1988. http://www.theses.fr/1988PA066401.

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Preparation de complexes du type (nr::(4))::(n)(cu::(4)(ncs)::(4)ms::(4)), m=mo, w, r=me, et et n=2 ou 3. Selon la taille du cation, obtention de macrostructures bidimensionnelles ou tridimensionnelles; l'insertion du cation pph::(4)**(+) conduit a la formation d'une structure infinie de chaines lineaires

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8

Chambron, Jean-Claude. "Synthese et etude de complexes du cuivre (i) et du ruthenium (ii) en vue de la separation intramoleculaire des charges photoinduites." Université Louis Pasteur (Strasbourg) (1971-2008), 1986. http://www.theses.fr/1986STR13092.

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Preparation de 2 macrocycles contenant a la fois des sites chelatants diphenyl-2,9 phenanthroline-1,10 et dialkyl-4,4' ou diaryl-4,4' bipyridine-2,2'. Dans le complexe heterodinucleaire il existe une interaction a l'etat excite entre les 2 metaux

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9

Menu, Marie-Joëlle. "Nouveaux reactifs dans la chimie des complexes du rhodium, du chrome et du tungstene : les anions diazo rc(n::(2))**(-)." Toulouse 3, 1988. http://www.theses.fr/1988TOU30068.

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Synthese des complexes de rh, cr et w contenant le coordinat diazo en faisant reagir les sels de li des anions rc(n::(2))**(-) sur les complexes metalliques. On a isole: (pme::(3))::(4) rhc(n::(2))sime::(3) (pet::(3))::(3) rhc(n::(2))sime::(3), (pme::(3))::(2) rhc(n::(2))(s)p(n-ipr::(2))::(2). On a mis en evidence un complexe carbenique dimere possedant un groupe ylure, lors de la photolyse de (pet::(3))::(3) rhc(n::(2))sime::(3)

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10

Tahiri, Mohamed. "Phtalocyanines de fer(i) et de fer(0) : synthese, structure et reactivite." Université Louis Pasteur (Strasbourg) (1971-2008), 1987. http://www.theses.fr/1987STR13043.

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Synthese et caracterisation d'une serie de complexes monoreduits de phtalocyanine de fer de type (fe pc r::(8))**(-) ou r=och::(3), ch::(3), h, cl et cn. On donne les structures par rx de composes monoanioniques et dianionique fe pc**(-) et fe pc**(2-). Proprietes chimiques de fe pc**(2-). De tels especes peuvent etre des modeles d'intermediaires formes dans la reaction de la phenylhydrazine sur la metmyoglobine ou dans le metabolisme de substrats suicides par cytochrome p450

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11

Weiss, Jean. "Synthese de (2) et (3)-catenands, coordinats a anneaux entrelaces." Université Louis Pasteur (Strasbourg) (1971-2008), 1986. http://www.theses.fr/1986STR13110.

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12

Marques, Elizabete. "Proprietes complexantes de nouveaux recepteurs moleculaires : catenands et calixarenes fonctionnalises." Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13105.

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Proprietes complexantes des coordinats : cat-30, de son motif constitutif m-30, de dimethyl-2,9 phenanthroline-1. 10 et de di(p-anasyl-)2,9 phenantroline-1. 10, vis a vis de cu**(+), ag, li, zu, cd. On etudie egalement les derives de calixarenes comportant des groupes ester ou cetone sur les o phenoliques-meres

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13

Edel, André. "Photochimie d'un complexe du cuivre (i) : etude dynamique et structurale par rmn de catenands et catenates." Université Louis Pasteur (Strasbourg) (1971-2008), 1987. http://www.theses.fr/1987STR13016.

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L'etude des proprietes photo-physiques et -chimiques du complexe cu(diphenylphenan)::(2)**(+) conduit au premier exemple d'un complexe de cu (i) realisant la photoreduction de l'eau sous irradiation en lumiere visible. Etude rmn de cu (cat-30)**(+) et cu (cat-27)**(+) montrant qu'ils presentent des proprietes topographiques identiques

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14

Houdier, Stéphane. "Cycloisomaltodextrines : synthèse, stéréosélectivité, analyse conformationnelle." Grenoble 1, 1993. http://www.theses.fr/1993GRE10046.

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Au cours de ce travail nous avons prepare les premieres cycloisomaltodextrines (cid) possedant un enchainement glycosidique de type alpha (1-6) et composes analogues des cyclodextrines naturelles (cd). Les tri, tetra, et hexasaccharides cycliques symetriques perbenzyles ont ete synthetises. Deux autres composes cycliques (di et tri), mais non symetriques, ont egalement ete isoles. Amelioration de la stereoselectivite dans la glycosylation par la methode de fraser-reid et coll. Et modification de la methode de mukaiyama et coll. Ont ete les points de departs de cette synthese. Malgre la nature particuliere de la liaison impliquee et la forte contrainte de ces composes cycliques une bonne stereoselectivite pour la glycosylation lineaire et de bons rendements pour l'etape de cycloglycosylation ont pu etre obtenus. L'etude conformationnelle du tetrasaccharide cyclique perbenzyle a ete effectuee par rmn et par mecanique moleculaire. Cette etude a permis de mettre en evidence l'existence en solution de deux conformations privilegiees a basse temperature. Pour ce meme tetrasaccharide cyclique perbenzyle, alors que la spectrometrie de masse indique une interaction avec les cations alcalins, la complexation n'a pu etre mise en evidence par rmn du proton. Cette opposition recouvre peut-etre une difficulte conceptuelle dans l'appreciation de ces phenomenes de complexation, difficulte liee aux caracteres propres de chacune des methodes envisagees ici

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15

FUNGARO, DENISE A. "Estudos sobre a existencia de onda polarografica catalitica no sistema envolvendo complexo de cobalto monovalente e bipiridina em meio aquoso e nao aquoso." reponame:Repositório Institucional do IPEN, 1993. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10787.

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Made available in DSpace on 2014-10-09T12:44:00Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:07:53Z (GMT). No. of bitstreams: 1 06542.pdf: 8087147 bytes, checksum: d612ed1a7213f89e107e4ab6f9b66638 (MD5)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Quimica, Universidade de Sao Paulo - IQ/USP

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16

Jeanjean, Audrey. "Ciblage du récepteur mannose 6-phosphate cation indépendant par des ligands, monovalents ou bivalents, analogues du mannose 6-phosphate." Montpellier 2, 2005. http://www.theses.fr/2005MON20067.

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17

Habbadi, Nouzha. "Activation des petites molecules par les complexes du cobalt : reaction des complexes monovalents du cobalt et de la trimethylphosphine avec les alcynes vrais." Toulouse 3, 1986. http://www.theses.fr/1986TOU30073.

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La reactivite des alcynes vrais est dominee par leur acidite et en consequence leur aptitude a donner des reactions d'addition oxydante sur le centre metallique riche en electrons. Aucune oligomerisation ni polymerisation n'a ete observee. Par contre des especes originales considerees comme les intermediaires reactifs des mecanismes de polymerisation des alcynes catalysee par les metaux de transition ont ete isoles. Avec les trois alcynes utilises : le t-butylacetylene, le pentyne et le phenylacetylene, huit composes originaux ont ete mis en evidence et isoles par cristallisation fractionnee

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18

Habbadi, Nouzha. "Activation des petites molécules par les complexes du cobalt réaction des complexes monovalents du cobalt et de la triméthylphosphine avec les alcynes vrais." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37598114z.

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19

Stephens, Ashley. "Cryptates and pendant arm ligand complexes / by Ashley Stephens." Thesis, 1994. http://hdl.handle.net/2440/21563.

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Includes bibliographies.<br>xi, 240 leaves : ill. ; 30 cm.<br>The complexation of a range of monovalent and divalent metal ions by the aliphatic bridge cryptands C22C2 and C22C8; and the complexation of alkali metal ions by the pendant arm tetraaza macrocycle 1,4,7,10-tetrakis(2-methoxyethyl)1,4,7,10-tetraazacyclododecane, and the factors effecting complex stability and lability, have been investigated.<br>Thesis (Ph.D.)--University of Adelaide, Dept. of Chemistry, 1995

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20

Clarke, Philip. "A study of cryptate complexes and pendant arm ligand complexes / by Philip Clarke." Thesis, 1992. http://hdl.handle.net/2440/19813.

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Typescript (Photocopy)<br>Includes bibliographies<br>x, 157, A.xxxi : ill ; 30 cm.<br>Summary: Studies the complexation of various monovalent metal ions by the diaza-crown ether C21 and the cryptands, C211 and C22C5 to form cryptates in various solvents, and investigates the kinetics for the interaction of the pendant arm ligand 1,4,8,11-tetrakis (2-hydroxyethyl)-1,4,8,11-tetraazacyclotetradecane (THEC) with the divalent metal ions Cd2+, Hg2+ and Pb2<br>Thesis (Ph.D.)--University of Adelaide, Dept. of Physical and Inorganic Chemistry, 1993

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21

Whitbread, Sonya L. "A stability and mechanistic study of pendant arm ligand complexes / by Sonya L. Whitbread." 1999. http://hdl.handle.net/2440/19444.

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Erratum pasted onto front-end paper.<br>Includes bibliographical references.<br>xi, 225 leaves : ill. ; 30 cm.<br>Title page, contents and abstract only. The complete thesis in print form is available from the University Library.<br>Investigates alkali and alkaline earth complexes of pendant arm ligands.<br>Thesis (Ph.D.)--University of Adelaide, Dept. of Chemistry, 1999

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