Dokumente Fakultät für Chemie (inkl. GAUSS) nach Gutachter "John, Michael Dr."
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Anthracene Based Colorimetric Molecular Sensors
(2015-02-17)Herein, different synthetic approaches to colorimetric luminescence sensors are presented. 9-Anthraceneamines turned out to be promising colorimetric pH sensors. Their large shift of the emission wavelength upon addition ... -
Bioinspired dioxygen activation with copper complexes supported by Bis(oxazoline) and Bis(benzimidazole) ligands
(2023-06-20)Many synthetic complexes modeling the oxy form of the tyrosinase have been developed and have shown a preference for either the side-on peroxodicopper(II) (P) or the bis(-oxo)dicopper(III) (O) core depending on the ... -
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. ... -
C-H Activation by Nickel and Iron Catalysis
(2019-08-08)The thesis contents methods for the selective activation and functionalization of C–H bonds, among the most abundant bonds in organic molecules. In particular, earth-abundant and cost-effective nickel and iron complexes ... -
Chelation-Assisted C–H Activation by Ruthenium and Osmium Catalysts and Recyclable Hybrid Catalysts
(2021-10-25)Since hydrocarbons are omnipresent structural units in organic compounds, the utilization of C–H bonds of hydrocarbons has great potential. Thereby, organic chemists have had utmost interests in the transformation of ... -
C–H Activation by Iron(III), Manganese(II) and Rhoda(III)electro Catalysis
(2020-12-15)While major progress was realized with noble transition metal catalysts, the employment of cost-effective and earth-abundant 3d metals has gained significant momentum during the last decade. As stoichiometric amounts of ... -
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 ... -
Development of Photo-Induced C–H Activation by Copper and Ruthenium Catalysis
(2019-11-08)Within recent decades, transition metal-catalyzed C–H activation has become a valuable and versatile tool for organic synthesis. As C–H bonds are ubiquitous in organic molecules, the direct site-selective functionalization ... -
Dynamics, Intermolecular Interactions, and Organization of Transmembrane β-Peptides
(2018-02-01)Cellular membranes contain a vast variety of proteins, which are practically required for every vital mechanism, such as selective transportation of ions and organic molecules, cell-cell recognition and signal transduction.[1] ... -
Earth-Abundant Transition Metal-Catalyzed Electro-Reductive Cross-Electrophile Coupling Reactions and C–H Activation by Cobaltaelectro-Catalysis
(2021-12-13)Within the last decades, immense progresses have been made with transition metal-catalyzed cross-electrophile reactions and C–H activation reactions. The merger of electrocatalysis with such powerful methods have further ... -
Electrochemical C-H Activations with 3d and 4d Transition Metal Catalysts
(2021-12-20)The oxidative metal-catalyzed C–H activation of inert bonds is a powerful tool for the functionalization of complex molecules. This platform allowed the broadening of the organic chemists’ toolbox and improved the ... -
Estimating Molecular Weights of Organometallics in Solution with Diffusion NMR Techniques
(2017-03-31)This PhD thesis focuses on diffusion NMR spectroscopy and the utilisation of the external calibration curve (ECC) diffusion-ordered spectroscopy (DOSY) technique on the estimation of molecular weights of organometallic ... -
Experimental and Computational Studies on Ruthenium- and Manganese-Catalyzed C-H and C-C Activation
(2019-11-07)During the last years, transition metal-catalyzed C–H and C–C activation has emerged as a powerful tool for the selective construction of C–C and C–Het bonds. In this context, a detailed mechanistic understanding of these ... -
Host-Guest Chemistry of Acridone-based Coordiantion Cages
(2018-06-07)Supramolecular coordination cages, assembled from organic ligands and metal cations, are of broad interest due to their versatile topologies and properties. Discrete cages often possess a secluded cavity, which allows ... -
Investigation of Peptidic Templates for Bioorthogonal Ligations
(2021-08-16)One of the biggest challenges for biochemical researchers in the postgenomic era remains the elucidation of structure-activity relationships in proteins. While many proteins can be routinely produced by recombinant protein ... -
Late-Stage Peptide Diversification via Transition Metal-Catalyzed C─H Activation
(2020-10-13)The late-stage modification of peptide is of great value to drug discovery and medicinal chemistry. Metal catalyzed C─H activation has emerged as efficient and step-economic strategy for post-translational peptide engineering. ... -
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 ... -
Metallaelectro-Catalyzed C─H Activations by 3d Transition Metals
(2020-09-17)The functionalization of C–H bonds largely relies on organic (pseudo-)halide electrophiles as coupling partners, which results in stoichiometric quantities of undesired by-products. Therefore, to achieve better resource ... -
Molecular Ruthenium based Water Oxidation Catalysts and their Immobilization on Electrode Surfaces
(2022-02-11)Ruthenium complexes are valuable in the field of catalytic water oxidation. Their stability and molecular nature allow for detailed mechanistic insight, and they can be synthetically modified to enhance their activity. ... -
N2 Splitting and Functionalization in the Coordination Sphere of Tungsten
(2020-12-02)The splitting and functionalization of N2 remains one of the most challenging reactions in coordination chemistry. In this thesis a series of four isostructural end-on N2 bridged ditungsten-PNP-pincer complexes are synthesized ...