Author: Sophie Anne Sim
Publisher:
ISBN:
Category : Ligands (Biochemistry)
Languages : en
Pages : 103

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Author: Stephanie Hochreuther
Publisher:
ISBN:
Category :
Languages : en
Pages : 16

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Author: Steven H. Privér
Publisher:
ISBN:
Category : Complex compounds
Languages : en
Pages : 424

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Author: Robert van Asselt
Publisher:
ISBN:
Category :
Languages : en
Pages : 191

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Author: Terence James Maguire
Publisher:
ISBN:
Category : Coordination compounds
Languages : en
Pages : 300

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This thesis describes the synthesis and reactivity of platinum(II) and platinum(IV) complexes with mixed donor ligands containing [P, N, C] and [P, N, O] donor sets derived from iminophosphines and phosphinoamides. Chapter 1 introduces the concepts and principles, like hemilability, that influence the formation of stable complexes and how this stabilisation can influence the reactivity of the complex. This is highlighted using aminophosphines and iminophosphines as examples. In order to present the application of these mixed-donor complexes, a comprehensive overview of platinum complex chemistry, including Pt(IV) complexes, trans complexes and cyclometallates, in medicine is given. Chapter 2 reports the coordination chemistry of two types of [P, N, C] donor ligands; iminophosphines HL1-4 and phosphinoamides HL5-7 to generate a novel library of monodentate, bidentate and tridentate cyclometallated Pt(II) species by a variety of methods. Chapter 3 describes the synthesis of novel ionic, monophosphine substituted Pt(II) complexes of [P, N, C] and [P, N, O] ligands. The iminophosphine ([P, N, C] and [P, N, O]) complexes underwent substitution with all three of the phosphines introduced. However, the success of the reaction of the iminolphosphine [P, N, C] complexes depended on the nature of the phosphine used. This leads to the conclusion that substitution reactions of iminolphosphine complexes are influenced by a combination of basicity and steric bulk of the incoming ligand. Chapter 4 reports the oxidation of bidentate and cyclometallated Pt(II) complexes to generate a novel series of Pt(IV) species. Additionally it reports 1H and 31P{1H} NMR investigations into the reduction of Pt(IV) by low molecular weight thiols and finally describes the reaction of the Pt(II) cyclometallates with the same low molecular weight thiols. All compounds synthesised in chapters 2-4 were characterised by elemental analysis, IR, 1H and 31P{1H} NMR spectoscopies. Selected complexes were also analysed using single X-ray crystal analyses and mass spectrometry.

Author: Wai-Yip Tong
Publisher: Open Dissertation Press
ISBN: 9781361342596
Category :
Languages : en
Pages :

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This dissertation, "Luminescent Platinum(II) Complexes Containing Dianionic Tetradentate Ligands Having Mixed Oxygen, Nitrogen and Carbon Donor Atoms and Platinum(II)-containing Phosphorescent Polymers: Synthesis, Photophysical Properties and Material Applications" by Wai-yip, Tong, 唐煒燁, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled LUMINESCENT PLATINUM(II) COMPLEXES CONTAINING DIANIONIC TETRADENTATE LIGANDS HAVING MIXED OXYGEN, NITROGEN AND CARBON DONOR ATOMS AND PLATINUM(II)-CONTAINING PHOSPHORESCENT POLYMERS: SYNTHESIS, PHOTOPHYSICAL PROPERTIES AND MATERIAL APPLICATIONS Submitted by TONG WAI YIP for the degree of Doctor of Philosophy at The University of Hong Kong in May 2014 Square planar platinum(II) complexes exhibit rich photophysical properties which are tunable through the structural variation of ligands and can be harnessed for applications in materials science. In this thesis, the great variety of spectroscopic properties of various square planar cyclometalated platinum(II) complexes supported by tetradentate (O DEGREESN DEGREESN DEGREESC and O DEGREESN DEGREESC DEGREESN) and tridentate (C DEGREESN DEGREESN) ligands containing dipyridyl moieties will be highlighted, along with their synthesis, characterization and potential application in organic light emitting diodes (OLEDs). Ind Platinum(II) complexes supported by tetradentate O DEGREESN DEGREESN DEGREESC or O DEGREESN DEGREESN DEGREESC types of ligands (O DEGREESN DEGREESN DEGREESC = 2-(4-(3,5-di-tert-butylphenyl)-6'-phenyl-2,2'- Ind bipyridin-6-yl)phenolate; O DEGREESN DEGREESN DEGREESC = 5,5-dialkyl-2-(6-phenylpyridin-2-yl) indeno[1,2-b]pyridin-9-olate) are emissive in solution at room temperature, with emission maxima tunable from 582 nm to 640 nm and quantum yields up to 0.28. Mechanochromism and the associated luminescence change in [Pt(dihexyl- Ind O DEGREESN DEGREESN DEGREESC)] (Complex 3.6) were found associated with the two different crystal packings revealed by powder X-ray diffraction (PXRD) studies. Fast vapochromic response of [Pt(3-O DEGREESN DEGREESN-2,6-difluoropyridine)] (Complex 3.3) on chloroform or dichloromethane vapours was found to be associated with structural changes in the solid state through PXRD studies. Robust and strongly emissive platinum(II) complexes supported by tetradentate O DEGREESN DEGREESC DEGREESN ligands featuring fused six-five-six membered metallacyclic ring (O DEGREESN DEGREESC DEGREESN = 2-(4-(3,5-di-tert-butylphenyl)-6-(9-(pyridin-2-yl) carbazol-2-yl)pyridin-2-yl)phenol) have been prepared. These platinum(II) complexes are among the most efficient yellow phosphors, with emission maxima ranging from 526 nm to 553 nm and luminescence quantum yields as high as -1 0.47-0.86. A yellow OLED with power efficiency (η ) up to 52 lm W is power demonstrated. In combination with the typical blue emitting iridium(III) 2' bis(4,6-difluorophenyl-pyridinato-N, C ) picolinate (FIrpic), white organic -1 light-emitting diodes (WOLEDs) displayed η up to 61 lm W and reduced power -2 efficiency roll-off at 1000 cd m . Random copolymers with photo-inert backbone poly[(N-vinylcarbazole)-co- ((R-C DEGREESN DEGREESN)Pt)] and poly[(2-(4-tert-butylphenyl)-5-(4-vinylphenyl)-1,3,4- oxadiazole)-co-((R-C DEGREESN DEGREESN)Pt)] (R-C DEGREESN DEGREESN = 3-(6-phenyl-4-(4-vinylphenyl) pyridine-2-yl)-isoquinoline or 3-(4-(4-(dec-9-enyloxy)phenyl)-6-phenylpyridin- 2-yl)isoquinoline) have been synthesized and characterized. Energy transfer between the charge transporting units and emissive (R-C DEGREESN DEGREESN)Pt units was revealed through ICP-MS inve

Author: Gregg J. Lumetta
Publisher:
ISBN:
Category : Complex compounds
Languages : en
Pages : 298

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Author: Kyle Richard Pellarin
Publisher:
ISBN:
Category :
Languages : en
Pages : 292

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This thesis describes a study of dimethylplatinum(II) complexes containing bidentate nitrogen donor ligands. This work deals with the oxidative addition of peroxides and focuses on synthesis, characterization and reaction mechanisms of these complexes. Dimethylplatinum(II) complexes were reacted with oxidants dimethyldioxirane (DMDO), meta-chloroperbenzoic acid (m-CPBA) and phthaloyl peroxide. The use of these oxidants has allowed for the synthesis of novel platinum(IV) complexes by oxidative addition and the formation of unique supramolecular networks. The formation of both trans- and cis-oxidative addition products was controlled by the type of oxidant utilized. By varying the ligand design of the platinum(II) complexes, the formation of the multiple platinum(IV) complexes have been obtained, each demonstrating their own unique chemistry. In other interests, low temperature 1H NMR spectroscopy has been utilized to follow the reaction pathway of the oxidative addition of iodine at [PtMe2(bpy)]. This technique allowed for the observation of intermediates formed within this reaction. The formation of intermediates shows solvent dependence following the trend; acetone>CD2Cl2> toluene, suggesting there is stabilization of these intermediates by more polar solvents.

Author: V. F. Sutcliffe
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Hartmut Yersin
Publisher: Springer Science & Business Media
ISBN: 9783540209485
Category : Science
Languages : en
Pages : 312

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With contribution by numerous experts