Dokumente Fakultät für Chemie (inkl. GAUSS) nach Erscheinungsdatum
Anzeige 61-80 von 702
-
C–H Activation via Iridium and Rhodium Electrocatalysis and Undirected Electrochemical Fluorination
(2022-06-24)In past decades, transition metal-catalyzed C–H activation has emerged as an increasingly viable toolbox for the step- and atom economic formation of C–C and C–Het bonds. However, oxidative C–H transformations heavily rely ... -
Dicationic Chelating Phosphines – Synthesis, Structure And Reactivity Towards Dienes
(2022-06-17)A new family of bidentate dicationic phosphine ligands incorporating an additional electron donating group was designed and synthesized. Obtained ligands were characterized using spectroscopical methods and single crystal ... -
Towards a total synthesis of bazzanin K
(2022-05-31)Bazzanin K is a natural product from the group of macrocyclic bis-bibenzyls which was isolated from the liverwort bazzania trilobata. This work is dedicated towards the development of a synthetic strategy with bazzanin K ... -
Detecting the Undetectable: Functional Protein Motions in the Hidden Timescale Window Revealed by NMR Relaxation Measurements
(2022-05-19)About 50 years ago, even before NMR was ready to determine structure of proteins, it could unveil a surprising motion in aromatic side-chain (Wuthrich & Wagner, 1975) from 1D 1H spectra. With decades of development, NMR ... -
Precise Nanoengineering of Polymer Functionalized Nanomaterials with Silica as Coating and Templating Tools
(2022-05-10)The construction of a well-defined hybrid nanostructure becomes possible if functional polymer meets inorganic nanomaterials in a well-designed way. To fully control the structure of the nanohybrid and create the synergy ... -
Electrochemical Dinitrogen Splitting and Nitride Transfer to Nitric Oxide with Rhenium Pincer Complexes
(2022-04-26)The Haber-Bosch process for the synthesis of ammonia from nitrogen and hydrogen consumes large amounts of energy and additionally relies on fossil feedstocks for the production of hydrogen. Alternative approaches for the ... -
On the dynamics of H atom scattering from metal surfaces
(2022-04-26)When a hydrogen atom collides with a surface it may either scatter or stick to the surface, depending on the energy loss the particle experiences during collision. It is established that non-adiabatic effects in form of ... -
Surface scattering dynamics of graphene and graphite
(2022-04-26)Since its first successful preparation in 2004, graphene has been extensively studied because of its outstanding mechanical, thermal and electronic properties. Graphene is an especially interesting material because of its ... -
Polyimido Sulfur Compounds as Promising Ligands in Molecular Magnets
(2022-04-08)Single-molecule magnets (SMMs) are molecules that exhibit slow relaxation of the magnetization after the removal of an applied external field. Therefore, they may find potential application in high density information ... -
Searching for more π-acceptor phosphines: From α-pyridiniophosphines to α-cationic phospholes
(2022-04-07)This thesis focuses on two classes of cationic phosphines. In the first part, the previously developed cationic pyridinio-phosphines were investigated further in respect to their coordination chemistry towards Ir and their ... -
Application of Asymmetric Gold-Catalyzed Hydroarylation in the Enantioselective Synthesis of Helicenes
(2022-04-07)A novel family of electron deficient, α-cationic ligands was synthesized, combining a chiral TADDOL-backbone with an electron withdrawing 1,2,3-triazolium moiety. Coordination to Au(I) gave the respective catalysts. Both ... -
Metal-induced aggregation of ß-peptides on membrane surfaces
(2022-04-05)According to the liquid mosaic model of Singer and Nicolson, the cell membrane defines the boundaries of a cell to the inside and outside and describes a twodimensional lipid bilayer. Integrated into this lipid bilayer ... -
Reconstitution of Connexin-43 in Artificial Membranes
(2022-04-01)Synthetic biology aims to engineer complex biological functions in an artificial way. A variety of molecular tools and techniques allow mimicking of processes of living systems in a synthetic way. In that context, the ... -
Late-Stage Peptide Functionalization by Transition Metal-free and Palladium-Catalyzed C–H Arylations
(2022-03-31)The focus of this thesis was set on the late-stage modification of peptides through transition metal-free and palladium-catalyzed C–H arylations. At first, the scope of the transition metal-free C2-arylation of the ... -
Activation and transformation of small molecules at a bimetallic β-diketiminato nickel platform
(2022-03-25)This dissertation focuses on the activation and transformation of small molecules by a dinuclear nickel platform. A series of nickel-complexes based on a binucleating bis(tridentate) ligand that consists of two ß-diketiminato ... -
N2 Fixation by Chromium and Rhenium PNP Pincer Complexes
(2022-03-16)This thesis focusses on the activation and functionalization of atmospheric dinitrogen by chromium and rhenium based transition metal complexes. The electronic structure of dinitrogen bridged key species is discussed based ... -
Chirality Detection of Surface Desorption Products using Photoelectron Circular Dichroism
(2022-03-16)In this thesis, I demonstrate the combination of chirality detection via photoelectron circular dichroism with surface scattering experiments and present a novel molecular beam surface science apparatus, specially designed ... -
Bioinspired Iron-Carbene Models of Heme and Non-Heme Enzymes: Electronic Structure and HAA Reactivity
(2022-03-15)The fast depletion of non-renewable energy sources requires modern chemists to develop new industrial processes that are more efficient and environmentally sustainable. In this framework, the functionalization (e.g. ... -
Herstellung und Charakterisierung von Polymernetzwerken im Kontext der präparativen Membranchromatographie
(2022-03-04)Preparative chromatography is an essential part in the industrial purification of biopharmaceuticals and thus allows the targeted therapy of severe diseases like cancer, multiple sclerosis or rheumatism. It enables the ... -
Investigation of Lithium Manganese Oxides Using High-Dimensional Neural Networks
(2022-03-03)Unraveling the atomic and electronic processes in modern energy materials is a key to advances in many important applications, from battery technology to heterogeneous catalysis. A prominent electrode material in lithium ...