Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 12 of 12 for “"Hydrogenation catalysts"”.
-
Small Molecule Activation Using Transfer Hydrogenation Catalysts
… amount of acid was found to promote the hydrogenation of 1 to 1H(H). The rate of hydrogenation of 1 was found to be dependent on the identity of the acid. It was found that acids with a pKa three orders of magnitude more acidic than [Cp*Ir(H2)(TsDPEN)] + (pKa = 13.88 in MeCN) resulted in …
-
Design and Modification of Half-Sandwich Ir(III), Rh(III), and Ru(II) Amino Acid Complexes for Application in Asymmetric Transfer Hydrogenation Reactions
… and their utility as asymmetric transfer hydrogenation catalysts of ketones. Variation of the metal center, the n-ring, and the aa was used to tune these systems for specific sets of ketones. Upon reaction with homochiral]s, the ligand environment in all of these complexes is …
-
A Global Optimization Scheme for Bimetallic Nanoparticles
… focus, as they are known as highly-effective hydrogenation catalysts. In addition, the monometallic cluster structures of Sn and Ru are explored. Sn clusters in a range from 2 to 20 atoms with higher stability than previously reported structures were obtained. The optimized Ru clusters match …
-
Synthesis and hydrogenation of iridium complexes with bidentate and water-soluble phosphine ligands: developing novel water-soluble catalysts for hydrogenation of unsaturates
The hydrogenation of unsaturated carbon-carbon 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 …
-
Effect of Pt Particle Size and Electronic Properties on the Hydrogenation of Ethylene
The hydrogenation of ethylene to ethane is a widely studied model reaction to investigate catalytic mechanisms. This reaction was historically regarded as structure-insensitive, until recent studies revealed that minor variations in the metal cluster size can affect both the geometric and …
-
METAL CATALYSED TRANSFER HYDROGENATION, DEHYDROGENATION AND RACEMISATION OF AMINES
… mechanisms relating to asymmetric transfer hydrogenation (ATH) of imines and the transfer dehydrogenation and racemisation of secondary amines by Cp*Rh and Cp*Ir complexes. A series of 16-electron complex of the type Cp*M(XNC6H4NX’) (where M = Rh or Ir and X, X’ = H or Ts) have been …
-
Homogeneous and heterogeneous rhenium catalysts for sustainable transformations of polyols, alcohols, and amines
… to activate C-H bonds in alcohols and amines. Dehydrogenation of alcohols into carbonyl groups is an important reaction. Acceptorless dehydrogenation is a novel, green, and atom-economical reaction, which has attracted attention recently. Metallic Re<sup>0</sup> nanoparticles catalyze …
-
Selektive Hydrierung biogener organischer Disäuren mit Rutheniumphosphinkatalysatoren
In the scope of this work the hydrogenation of diacids was investigated in depth on the example of itaconic acid. Rutheniumcatalysts with phoshineligands were stable and active hydrogenation catalysts. Mono- and bydentate ligands catalyse the conversion towards the 2- and …
-
Transition Metal Heterogeneous Catalysis Towards Applications in Sustainable Energy: Leveraging Rational Design Principles for Activity, Stability, and Stereoselectivity
… is a multistep reaction comprised of methanol dehydrogenation leading to CO adsorbed on the catalyst surface, followed by CO oxidation. Incorporation of an oxophilic material that facilitates the formation of OH groups on the surface is highly effective for improving CO oxidation and MOR …
-
Quinoline-triazole half-sandwich iridium(III) complexes: Synthesis, antiplasmodial activity and preliminary transfer hydrogenation studies
… for their ability to facilitate transfer hydrogenation, by reducing β-nicotinamide adenine dinucleotide (NAD+) to NADH in the presence of hydrogen source, sodium formate. Through preliminary qualitative and quantitative cell-free experiments, it was found that the two most active neutral, …