Browsing Naturwissenschaften, Mathematik und Informatik by Advisor "Stalke, Dietmar Prof. Dr."
Now showing items 21-40 of 45
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Assessment of Single Crystal X-ray Diffraction Data Quality
(2017-03-13)This PhD thesis focuses on single crystal X-ray diffraction data quality, the handling of systematic errors during data collection and the appropriate modelling of experimental charge density distributions. The development ... -
Unconventional Carbene-Donor Ligands for the Development of new Catalysts
(2016-11-01)The development of a new synthesis strategy towards unconventional carbene ligands is shown in this work. Our major aim was to establish a synthetic strategy that would enable the efficient palladium or nickel catalysed ... -
Fluorescence Studies of Amine-substituted Azaanthracene Metal Complexes
(2016-07-20)Former investigations of the Stalke group focussed on the hydrocarbon fluorophore anthracene. In this thesis, two representatives of the heteroaromatic congener azaanthracene with different fluorescence properties and ... -
DOSY External Calibration Curve Molecular Weight Determination as a Valuable Methodology in Characterizing Reactive Intermediates in Solution
(2016-04-01)A new DOSY-ECC-MW-determination methodology is introduced. This method determines molecular weights of unknown solutes in THF-d8 and TOL-d8 solution with exceptional accurately and reliability with a maximum deviation of ... -
Charge Density Analysis of Low-Valent Tetrels
(2016-02-11)This thesis deals with the bonding situation of low valent tetrels. More precisely an experimental charge density study of the silylone (cAACcy)2Si was carried out in order to investigate whether the bonding in this new ... -
Data Quality Bench-Marking for High Resolution Bragg Data
(2015-03-05)The thesis deals with data quality bench-marking for high resolution Bragg data. It compares and evaluates Bragg data from various radiation sources and different detection types. Two different small molecules containing ... -
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 ... -
Syntheses and Characterization of Polyimidosulfate Complexes
(2015-02-12)In this work, novel metal complexes of the sulfur-nitrogen ligand, [S(NtBu)4]2-, were synthesized by exchange of lithium atoms or by other metal salts. Moreover, novel lithium complexes of asymmetric hydrogen tetraimido ... -
Metal complexes of a new polyimido sulfur phosphanyl ligand
(2015-02-10)Within this thesis, a new synthetic access to diverse metal complexes of polyimido sulfur phosphanyl ligands was developed. The coordination behaviour of either the lithiated ligand [(tmeda)Li{(NtBu)3SCH2PPh2}] (1) or the ... -
Synthesis and Fluorescence Properties of Anthracene Derivatives and their Metal Complexes
(2014-12-01)By variation of substituents and by complexation of metal ions the fluorescence properties of anthracene derivatives are altered in solid state and in solution. Solid state fluorescence properties are aligned with structural ... -
Exploring Metal-Ligand Interactions of Pyrrole Based Pincer Ligands
(2014-02-18)This thesis is based on the exploration of metal-ligand interactions of pyrrole based pincer ligands. By analyzing the carbon-carbon bond lengths within the pyrrole heterocycle inferences were drawn about the metal-ligand ... -
Aggregation Study on Lithiated Five-membered Heterocycles – Towards the Pentuple Ion
(2014-01-30)The main work of this thesis focuses on the elucidation of the aggregation of 2-thienyllithium, methyl-substituted 2-thienyllithium and 2-furyllithium in the solid state and in solution. The addition of an adequate donor ... -
Advanced NMR Methodology for the Investigation of Organometallic Compounds in Solution
(2013-11-06)The scope of this thesis was to investigate organometallic compounds by advanced solution state NMR methods in order to build a bridge from known solid state structures to their behaviour in solution. Since these reagents ... -
From X-ray diffraction data annealing to comprehensive charge density analysis
(2013-10-11)The current thesis focuses on three detailed experimental QTAIM charge density studies on small molecules based on high resolution X-ray diffraction experiments. Each of the three studies required the application of different ... -
Charge Density Distribution in Low-Valent Tetrels
(2013-05-22)The scope of this work was the analysis of the electron density of low valent tetreles. For silicon and carbon-containing compounds. Especially low valent silicon compounds are of great interest because their synthesis has ... -
Design of Phosphorus Centered Janus Head Ligands
(2012-02-03)The scope of this thesis was the preparation of a Janus Head ligand based on the N,P,N ligand di-2-picolylphenylphosphane and the synthesis of different metal complexes containing this Janus ... -
METAL COMPLEXES OF SCORPIONATE-LIKE POLYIMIDO SULPHUR PHOSPHANYL LIGANDS
(2011-11-01)In this thesis a new synthetic access to side-arm functionalized sulphur diimide ligands is developed. They can be tuned in their steric demand as well as in their electronic properties. ... -
Janus Kopf Liganden in heterobimetallischen Komplexen
(2010-11-26)This thesis includes studies on the Janus-head ligand di(benzothiazole-2-yl)phosphane. An improved synthesis and modifications of the ligand are reported. Additionally different mono- and ... -
Structural analysis of organometallic deprotonation agents and computational studies on formally hypervalent molecules
(2010-10-22)The following thesis targets two topics. The first one deals with the synthesis and crystallization of reactive organometallic deprotonation agents and important metalated intermediates ... -
Fluoreszenzchemosensoren auf Basis des Anthracen-Fluorophors
(2010-07-22)Anthracene has an extended π-electron system. Beside the strong fluorescence it also yields high fluorescence efficiency. These facts promote anthracene to a very interesting research target ...