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Tesi sul tema "Ditopic ligand"

Autore: Grafiati

Pubblicato: 21 dicembre 2024

Ultima modifica: 19 luglio 2025

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1

ALBISETTI, A. FIGINI. "Structural and Thermodiffractometric Studies of Coordination Polymers Containing Ditopic Exobidentate Nitrogen Ligand." Doctoral thesis, Università degli Studi di Milano, 2008. http://hdl.handle.net/2434/57743.

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2

Rahm, Fredrik. "Chiral Pyridine-Containing Ligands for Asymmetric Catalysis. Synthesis and Applications." Doctoral thesis, KTH, Chemistry, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3564.

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Abstract (sommario):

<p>This thesis deals with the design and syntheses of chiral,enantiopure pyridinecontaining ligands and their applicationsin asymmetric catalyis.</p><p>Chiral pyridyl pyrrolidine ligands and pyridyl oxazolineligands were synthesized and employed in thepalladium-catalysed allylic alkylation of 1,3-diphenyl-2-propenyl acetate with dimethyl malonate. Theinfluence of the steric properties of the ligands wereinvestigated.</p><p>Ditopic ligands, containing crown ether units as structuralelements, were synthesized and some of the ligands were used asligands in the palladiumcatalysed allylic alkylatio

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3

Turner, Thomas P. W. "Bifunctional unsymmetrical ditopic ligands for alkene methoxycarbonylation." Thesis, University of Bristol, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.658207.

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A series of unsymmetrical xylenyl-backboned diphosphine ligands are reported: o-C6H4(CH2ptSU2)(CH2PRR'), R = Ph, R' = 2-Py (L1) and O-C6H4(CH2ptSU2)(CH2PR2), R = 2-Py (L2), R = 2-(3-Me-Py) (L3), R = 2-(4- Me-Py) (L4), R = 2-(6-Me-Py) (Ls) and R = 2-Pyrim (Ls). The ligands have all been characterised by 31p, 1H and 13C NMR spectroscopy and high resolution mass spectrometry. Studies of [PtCI(CH3)(L)] and [PdCI(CH3)(L)] (L = L1-LS) have shown that the favoured isomers have the more strongly a-donating CH3 ligand trans to the bulkier ptSU2 donor. Studies with [PdCI2(L)], [PtCI2(L)] and [Pt(CH3h(L)

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4

Smith, Kate Jennifer. "Ditopic ligands for the extraction of divalent metal salts." Thesis, University of Edinburgh, 2004. http://hdl.handle.net/1842/12982.

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This thesis extends earlier work at the University of Edinburgh aimed at opening up new flowsheets for the hydrometallurgical recovery of base metals using tetradentate ligands which are capable of transporting metal salts {both a metal cation and its attendant anion(s)}. Prototypes were based on salicylaldimine derivatives of diamines, “salen” ligands in which coordination of a metal dication releases the two phenolic protons which are captured by pendant secondary amine groups generating a preorganised dicationic binding site for the anion(s). The thesis initially deals with the design, synt

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5

Dussart, Caitlyn. "Chiral self-recognition study of metallic complexes : towards coordination polymers." Electronic Thesis or Diss., Strasbourg, 2024. http://www.theses.fr/2024STRAE006.

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Les assemblages polymériques métallo-supramoléculaires constituent une nouvelle classe de matériaux apparue au cours des dernières décennies. Ces matériaux présentent un large éventail de propriétés qui dépendent de la nature des métaux et des ligands ditopiques utilisés. La réversibilité des liaisons de coordination offre également un caractère dynamique au système qui peut répondre à un stimulus externe. En introduisant de la chiralité dans ces systèmes moléculaires, nous pouvons étudier la capacité de ces structures moléculaires à s’associer ou à se désolidariser pour former des espèces hom

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6

Santillan, Guillermo A. "Coordination polymers and building blocks based on ditopic heteroscorpionate ligands." Diss., [La Jolla] : [San Diego] : University of California, San Diego ; San Diego State University, 2009. http://wwwlib.umi.com/cr/ucsd/fullcit?p3379543.

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Thesis (Ph. D.)--University of California, San Diego and San Diego State University, 2009.<br>Title from first page of PDF file (viewed November 17, 2009). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references.

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7

Galbraith, Stuart G. "Ditopic ligands for the selective solvent extraction of transition metal sulfates." Thesis, University of Edinburgh, 2004. http://hdl.handle.net/1842/10911.

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The thesis considers the development of new reagents which could transport transition metal <i>salts</i> in extractive hydrometallurgy and addresses the ligand design features which are needed to control the strength and selectivity of binding of both a particular metal cation and its attendant anions(s). Extractive metallurgy of base metals is surveyed in chapter 1 and suggests that more efficient recovery processes are needed. One new approach, which could lead to much better materials balances in many cases, is to use hydrometallurgical techniques which involve co-extraction and transport o

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8

Bokolinis, Georgios. "The synthesis of novel ditopic ligands for supramolecular chemistry and sensor applications." Thesis, University of Huddersfield, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.430296.

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9

Gordon, Ross John. "Improved mass transport efficiency in copper solvent extraction." Thesis, University of Edinburgh, 2009. http://hdl.handle.net/1842/5673.

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This thesis considers methods which can be employed to increase the mass of copper transferred into and out of the organic phase during the load and strip stages of commercial solvent extraction processes. Conventional 5-alkylsalicylaldoxime reagents transfer 1 mol of divalent copper per 2 mol of ligand in a neutral complex of the type [Cu(L-H)2] via a pH-swing process. New triacidic ligands have been designed which triple the molar transport of copper to form [Cu3(L-3H)2]. Until recently copper recovery by solvent extraction has been confined to oxidic ores which are leached with sulfuric aci

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10

Zanardi, Alessandro. "N-heterocyclic-carbene-based Ditopic and Hemicleaveable ligands for the design of improved catalysts." Doctoral thesis, Universitat Jaume I, 2010. http://hdl.handle.net/10803/669141.

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La presente memoria ha profundizado en el diseño de nuevos catalizadores al utilizar dos nuevos tipos de ligandos diferenciados: triazolil-di-ilideno y bis-alquenil-NHCs. El uso del ligando trimetiltriazolil-di-ilideno, ha permitido obtener series de compuestos de tipo homo- y hetero-bimetálicos, estableciéndose criterios claros de coordinación que garantizan que el mismo ligando se puede utilizar de manera amplia en su coordinación a prácticamente cualquier par de fragmentos metálicos. La preparación y la caracterización de los compuestos heterobimetálicos establece un gran avance en el di

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11

Higginson, Joshua J. "Synthesis and coordination chemistry of ditopic ligands capable of coordinating metal ions and interacting with anions." Thesis, University of Huddersfield, 2015. http://eprints.hud.ac.uk/id/eprint/26444/.

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The aim of this research was to synthesise a series of novel organic multidentate ligands which contain N-donor domains for the coordination of metal ions and amide or amine hydrogen atoms which are capable of interaction with anions. It was envisaged that incorporation of these two binding units would produce a system where the metal ions would control the ability of the ligand to interact with anions or vice versa. Ligand 1 contains a tetradentate N-donor domain formed by a central bipyridine, two thaizole units and two amide units attached in the 4,4’-position of the bipyridine unit. Reacti

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12

Guo, Qianqian Verfasser], Ullrich [Akademischer Betreuer] [Englert, and Sonja [Akademischer Betreuer] Herres-Pawlis. "Ditopic Ligands: Synthesis, Characterization, Selectivity and Structural Properties of their Derivatives / Qianqian Guo ; Ullrich Englert, Sonja Herres-Pawlis." Aachen : Universitätsbibliothek der RWTH Aachen, 2017. http://d-nb.info/1162499338/34.

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13

Sague, Doimeadios Jorge Luis. "Silver coordination compounds with a family of ditopic ligands of varying flexibility : about chains, rings, helices and polycatenanes /." Basel : [s.n.], 2008. http://edoc.unibas.ch/diss/DissB_8105.

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14

Wenzel, Marco. "Tripodale Azaliganden - Ambivalente Rezeptoren für Kationen und Anionen." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2008. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1210087455514-66575.

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Das Ziel der vorliegenden Arbeit bestand in der Synthese von neuen funktionalisierten tripodalen Azaliganden auf Basis von Tris(2-aminoethyl)amin (Tren) und ihrer Charakterisierung als Rezeptoren und Extraktionsmittel für Kationen, Anionen sowie Salze. Die Komplexbildungs- und Phasentransfereigenschaften gegenüber den Kationen Ag(I), Co(II), Ni(II), Cu(II), Zn(II) und Cd(II) sowie den Anionen Cl-, Br-, I-, H2PO4-, SO42- und HCrO4- wurden durch Flüssig-Flüssig-Extraktion und Flüssigmembrantransport, 1H-NMR-Spektroskopie sowie Silberpotentiometrie untersucht; Struktur-Wirkungsbeziehungen für die

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15

Kunz, Kerstin [Verfasser]. "Synthese und Reaktivität Cymantrenyl-substituierter Poly(pyrazol-1-yl)borate und ditoper Tris(mercaptomethylimidazolyl)borat-Liganden / von Kerstin Kunz." 2009. http://d-nb.info/1001903404/34.

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