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Showing 1 to 20 of 32 for “"iridium complexes"”.
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Strategies to Optimize Photophysical Properties in Cyclometalated Iridium Complexes
In the past 50 years, iridium has become an indispensable material that supports various technologies that power our modern world. Recently, there has been a growing interest in iridium(III) organometallic complexes for their optoelectronic applications. This thesis delves into the synthesis, …
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Synthesis and properties of mononuclear and polynuclear indenyl iridium complexes
The reaction of $\rm Ir(CO)\sb2(\eta\sp5$-$\rm C\sb9H\sb7)$ with $\rm Ir(\eta\sp2$-$\rm C\sb2H\sb4)\sb2(\eta\sp5$-$\rm C\sb9H\sb7)$ provided $\rm Ir\sb3(\mu$-$\rm CO)\sb3(\eta\sp5$-$\rm C\sb9H\sb7)\sb3$, and the reaction of $\rm Ir(CO)\sb2(\eta\sp5$-$\rm C\sb9H\sb7)$ with $\rm Rh(\eta\sp2$-$\rm …
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Iridium Complexes for Intracellular Transfer Hydrogenation and Their Potential Biological Applications
… We found that pentamethylcyclopentadienyl iridium(III) (Cp*Ir) complexes bearing 2-pyridinecarboxamidate ligands are capable of mediating catalytic hydride transfer from either NADH or formate to aldehydes in PBS buffer and cell culture media. These iridium catalysts are tolerant of …
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Synthesis, characterization, and reactivity studies of iridium complexes bearing the ligand diphenylphosphidoboratabenzene
… structure, and reactivity properties of three iridium square planar complexes bearing the anionic phosphine ligand diphenylphosphidoboratabenzene (DPB) are described. Reactivity studies show a rate enhancement for the oxidative addition of a substituted benzyl bromide and Me₃SnBr with DPB as a …
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Iridium complexes as highly active catalysts for hydrogen isotope exchange and hydrogen borrowing processes
… community has become increasingly reliant upon iridium catalysis, with applications reported across a number of research areas. In recent years, the Kerr group has developed a series of iridium complexes, which were found to be excellent catalysts for hydrogen isotope exchange and olefin …
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Cyclometallated platinum and iridium complexes with thiolate ligands, and novel bioimaging agents inspired by dynamic disulfide interchange reactions
… second and third row transition metal complexes make them potential candidates for use in a range of applications such as triplet harvesting agents in OLEDS, as photosensitizers, and in solar cells. Also, the strong luminescence of these complexes gives them much potential for use in …
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Synthesis and biological evaluation of polynuclear cyclometalated ruthenium, rhodium and iridium complexes based on a PPI dendritic scaffold
A series of chelating, bidentate (C,N-) monomeric and dendritic ligands based on a poly(propyleneimine) dendritic scaffold were synthesized via a Schiff-base condensation reaction of the relevant amine and either naphthaldehyde or benzaldehyde. These reactions yielded air- and moisture-stable …
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Synthesis and hydrogenation of iridium complexes with bidentate and water-soluble phosphine ligands: developing novel water-soluble catalysts for hydrogenation of unsaturates
… bonds catalyzed by transition metal hydrido complexes has received considerable attention in the literature. Environmental interests have placed considerable emphasis on switching these processes into aqueous media. The dimeric complex [Ir(COD)Cl]₂ (COD = 1,5-cyclooctadiene) has been found to …
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Nano Structure and Novel Charging Materials of the Small Molecule Based OLED Devices
… measurements were presented. Finally, a set of iridium complexes synthesized by Professor Martin Bryce‟s group in the Chemistry Department of Durham University were spin-coated onto the ITO/Glass substrate to make an OLED device. Such complexes, while in devices, behave as the electrolyte. When …
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The synthesis, characterization and metathesis reactivity of compounds (with at least one pendant alkene group) of iron, ruthenium and iridium
… studies of (i) ruthenium and iron mono(alkenyl) complexes of the type LM(COh{(CH2)nCH=CH2} (M = iron or ruthenium, L = l1s-C sHs or l1 s-CS(CH3)s and n = 2 - 6), 41 - 51; (ii) iridium complexes of the type Cp*Ir(CI)2{PPh2(CH2)mCH=CH2} (m = 2 - 4 and 6), 69 - 72; and (iii) bis(alkenyl) acyl …
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Transition Metal Complexes Anchored on Europium Oxide Nanoparticles
Polypyridyl transition metal complexes containing ruthenium, rhodium and iridium centers are mainly studied due to their light absorbing and emitting properties. Lanthanide oxides such as europium oxide absorb light as well and exhibit strong luminescence and long lifetimes. The optical properties …
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Efforts Toward the Site-Selective Dehydrogenation of Saturated Fatty Acids
… functionalization of saturated fatty acids using iridium carboxylate complexes are described. A variety of iridium complexes were developed bearing a coordinated carboxylate ligand. These complexes were submitted to known dehydrogenation conditions; however, dehydrogenation products were not …
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Novel Iridium (III) complexes for photocatalytic H2 generation from H2O using sunlight
… homogeneous and heterogeneous transition metal complexes for photocatalytic hydrogen generation using visible light irradiation and as OLED’s are under intense investigation. Transition metal complexes are drawing great interest as they offer highly efficient room temperature phosphorescence. In …
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"The New Chemistry" - Sustainable Catalysis with Alcohols
Subject of the thesis are new iridium complexes stabilized by anionic P,N- or P,N,P-ligands. These complexes were used in homogeneous catalysis. Furthermore, mechanistic studies were performed to provide an insight into the catalytic cycles. Synthesis protocols for a multitude of different product …
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Mechanistic studies on iridium catalyzed allylic substitution
Mechanistic studies on iridium catalyzed allylic substitution reactions catalyzed by iridium phosphoramidite complexes revealed that the active catalyst is generated through a base assisted cyclometalation of the phosphoramidite to form five-membered iridacycle. A mechanism for the reaction was …
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Ligand Cooperative Iridium PCP Complexes for Small Molecule Activation
… considerable success in using transition metal complexes to manipulate small molecules and perform otherwise difficult transformations such as the splitting of water into H2 and O2 or the decomposition of harmful emissions such as CO2 or N2O. This thesis presents the synthesis of a new PCP …
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The Development of New Stereoselective Transformations Using Alkenyl Boronate Complexes
Anionic, tetravalent alkenyl boron-"ate" complexes have emerged as powerful reagents for the stereoselective synthesis of chiral boronic esters via multicomponent coupling. These complexes can react with electrophiles through a 1,2-metalate rearrangement process, resulting in the net addition of a …
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Halogen-elimination photochemistry and oxygen-activation chemistry of late transition-metal complexes
… and reduction chemistries of rhodium and iridium hydride complexes are highlighted. In Chapters 1 and 2, photochemical halogen elimination from a variety of late transition-metal complexes is described. Studies of phosphine-terminated gold(III) halide complexes demonstrated that efficient …
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