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Showing 1 to 20 of 32 for “"Iridium(III)"”.
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Iridium (III) photosensitisers for photoredox catalysed carboxylation reactions of ketimines
… two mononuclear cationic bis-cyclometalated iridium(III) complexes (C1, C2) and a new trinuclear iridium(III) complex (C3) were synthesised. The complexes (C1-C3) were obtained as racemic mixtures (Λ, Δ isomers) which is an attribute of the helical chirality, inherent to these types of …
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Luminescent Iridium(III) Cyclometalated Complexes: Host-Guest Chemistry and Application as Sensors
In this thesis, known and new iridium(III) cyclometalated complexes have been synthesized and investigated in a host-guest chemical context and in studies towards an application in the detection of peroxide-based explosives in fingerprints. The complexes [Ir(ppy-R)2(bpy)]n+ studied here contain two …
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Novel Iridium (III) complexes for photocatalytic H2 generation from H2O using sunlight
… room temperature phosphorescence. In particular iridium (III) complexes are considered to be the most promising since they exhibit: (1) good photo and thermal stabilities, (2) high phosphorescence quantum efficiency, (3) very large values for excited state lifetimes, (4) facile colour tuning …
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Complexes of Platinum(II) and Iridium(III) with Liquid Crystal and Luminescent Properties
… with its square planar geometry, and iridium(III) with its octahedral geometry, and the aim is to modify the ligand structures so that, in combination with the metal, liquid-crystalline complexes result that retain the emissive properties of the 2-phenylpyridine-metal chromophore.. All …
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New luminescent iridium (III) complexes containing NCN cyclometallated ligands: synthesis, photophysical properties and emission tuning
The luminescence properties of cyclometallated iridium(III) complexes render them of interest, for example, as phosphorescent dopants in organic light-emitting devices (OLEDs), as photoactive units in solar energy conversion, and as biosensors. The vast majority comprise three bidentate ligands, …
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Quinoline-triazole half-sandwich iridium(III) complexes: Synthesis, antiplasmodial activity and preliminary transfer hydrogenation studies
… cyclometallated and two cationic,N,N-chelated iridium complexes. Computational analysis revealed that metal coordination to the quinoline nitrogen occurs first, forming an unstable kinetic product that, upon heating over time, forms the stable, cyclometallated, thermodynamic product. All of the …
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Rapid Synthesis, Characterization, and Catalytic Function of Rhodium(III) and Iridium(III) Chloro-bridged Dimers
Rh(III) and Ir(III) dimeric complexes with tunable cyclopentadienyl (Cp) rings have proven versatile for both catalysis and as synthetic precursors. An efficient microwave method to synthesize Rh(III) and Ir(III) dimeric complexes [(η5-ring)MCl]2(μ2-Cl)2, (where (η5-ring)MCl = (η5-Me4C5R)Rh(III)Cl …
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Heteronuclear trimetallic polyazine complexes of iridium (III) or rhodium (III) as electrocatalysts for the reduction of CO2
The research investigations involved in this thesis were focused on the development of multimetallic systems to function as electrocatalysts for the reduction of CO₂.
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C-H activation: oxidative addition to an iridium(I) center and reactivity of the resulting iridium(III) species
Thermal reactions of the iridium complex, [Ir(COD)(PMe₃)₃]Cl (COD=1, 5 Cyclooctadiene), with benzene, benzaldehyde, pyridine, and furan yield the C-H addition products of mer-(Me₃P)₃Ir(Phenyl)(H)C! (1), mer-(Me₃P)₃Ir(COC₆H₅)(H)Cl (II), mer-(Me₃P)₃Ir(Pyridyl)(H)Cl (IID, and mer-(Me₃P)₃Ir(furyl)Cl …
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O-H activation in phosphates: oxidative addition to an iridium(I) center and reactivity of the resulting iridium(III) species
… binding modes of the phosphate group to the iridium center and then to react biologically occurring phosphates with [Ir(1,5-COD)(PMe₃)₃]Cl. The reaction of dibenzyl phosphate (DBP) with [Ir(1,5-COD)(PMe₃)₃]Cl has been studied in detail. The resulting complex, Ir(PMe₃)₃(H)(DBP)Cl, is soluble …
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Elucidation of the aqueous equilibrium system of IrH₂(PMe₃)₃Cl and periodic trends of the iridium (III) dihydrido tris(trimethylphosphino) series, IrH₂(PMe₃)₃X
… (1) indicate that (1) is in equilibrium with the iridium(III) dihydrido “aquo” complex, [IrH₂(PMe₃)₃(H₂O)]⁺, and not the μ-chloro bridged complex, { [IrH₂(PMe₃)₃]₂Cl}⁺ (2), as previously reported. The calculated K<sub>eq</sub> value for the aqueous equilibrium is (0.0037 ± 0.0003) M. Thermodynamic …
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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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Functionalized Dipyrrins as Ligands for Photoactive Coordination Complexes
… project, the preparation of the dipyrrinato iridium(III) complexes was carried out with meso-substituted dipyrrins, again starting from dipyrromethanes carrying the pentafluorophenyl and the 4 fluoro-3-nitrophenyl moiety, respectively. A wide scope of functionalized dipyrrins was synthesized …
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Oxidation addition of H-H bonds to iridium: developing novel active water soluble catalysts for hydrogenation of unsaturates
The oxidative addition of H-H to iridium(l) trimethylphosphine complexes was studied and the reactivity of the resulting water soluble dihydrido iridium (III) complexes was investigated. One Dihydrido iridium(III) complex, mer-Ir(H)₂(PMe₃)₃CI <b>(2)</b> was characterized by ¹H, ³¹p and ¹³C NMR …
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STRUCTURAL AND LUMINESCENT APPLICATIONS OF FUNCTIONALIZED SELF-ASSEMBLED SUPRAMOLECULAR COORDINATION COMPLEXES
… biological and luminescent applications of iridium (III), ruthenium (II), rhenium (I) and platinum (II) self-assembly supramolecular coordination complexes. The exploration of interlocked structures provided an effective way to reveal the secretes of biologic self-assembly in nature. …
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Investigations in the chemistry of transition metal complexes containing the tripodal amine β,β′,β″-triaminotriethylamine
… processing of rubber.</p> <p>Complexes of cobalt(III) with triaminotriethylamine and triethylenetetramine have been shown to be effective in promoting the cleavage of N-terminal amino acid residues from peptides. Chromium(III) complexes of amines and polyamines, both monomers and dimers, are …
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