Browsing Naturwissenschaften, Mathematik und Informatik by Title
Now showing items 4632-4651 of 5531
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Synthese von Tetragastrin-CC-1065-Konjugaten und verwandten Verbindungen für eine selektive Krebstherapie
(2007-06-19)The antibiotic (+)-CC-1065 was first isolated from culture of Streptomyces zelensis in 1978. It showed in both in vitro and in vivo performed screenings very high cell toxicity. The study ... -
Synthese, biologische Evaluation und Untersuchung des Wirkmechanismus neuartiger Duocarmycin-Analoga für eine selektive Krebstherapie
(2009-03-24)Despite considerable efforts towards the development of efficient cancer therapies, most anti-cancer agents applied so far in the clinic cause severe side effects because their cytotoxic ... -
Synthesen und Strukturen neuer Lanthanoid- und Quecksilberkomplexe mit polyfunktionellen Ligandensystemen
(2003-04-16)In this work is shown how the dppaS2-ligandsystem and its derivates are used as polyfunctional ligands to synthesis mono and polynuclear complexes of rare earths and mercury. Herein the ... -
Synthesen von Organogalliumhydriden und Organogalliumhalogeniden
(2007-06-26)This dissertation describes how gallium hydride can be stabilised with arduengo carbenes. Furthermore the structure of gallium hydride vinamidine was researched. One focus was the reactivity ... -
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 ... -
Syntheses and Electron Density Determination of Novel Polyimido Sulfur Ylides
(2007-12-18)Three major aims have been pursued in the course of this thesis: I) Classification of the S-C, S-N and Li-C interactions in a polyimido sulfur ylide by use of an experimental electron density ... -
Syntheses of Novel Side-Arm Functionalized N-Heterocyclic Silylene Transition Metal Complexes
(2019-08-30)The main field of silylene chemistry is emerging towards the utilization as strong σ-donating ligands for transition metal complexes. The focus of this area of chemistry was set primarily on the recreation of previous ... -
Syntheses, Structures, and Reactivity of Divalent Germanium and Tin Compounds Containing a Diketiminato Ligand
(2002-10-15)In this thesis, diketiminato ligands have been employed as a supporting moiety for germanium and tin compounds. The experimental results demonstrate that steric bulk and additional ... -
Syntheses, Structures, Electrochemical and Oxygen Atom Transfer Properties of Molybdenum and Tungsten Complexes with Sulfur and Selenium Containing Ligands
(2007-05-10)Molybdenum and tungsten can be found at the active sites of the molybdopterin-containing oxygen-atom-transfer enzymes. Another interesting diversity of these enzymes is that in the DMSO ... -
Synthesewege zu neuen Mehrkernkomplexen von Pyrazol-NHC-Hybridliganden mit Übergangsmetallen - mit Fokus auf Silber-Komplexe
(2011-01-17)Targeted ligand design is constantly gaining importance in chemical research. There is a large number of ligands that can be differentiated by their back bone's, the kind and number of donor ... -
Synthesis and Application of new chiral Peptides, Guanidines and Formamides as Organocatalysts for Asymmetric C-C Bond Formation Reactions
(2007-02-07)For this Ph. D. thesis I synthesized chiral peptides, guanidines and formamides and used them as organocatalysts in asymmetric C-C bond formation reactions. Here I demonstrated that small ... -
Synthesis and Characterization of Ethylene-Acrylic Acid Copolymers Produced under High Pressure
(2009-07-28)Free-radical copolymerizations of ethene (E) with acrylic acid were carried out in a continuously operated stirred tank reactor at pressures up to 2300 bar and temperatures up to 300 °C. ... -
Synthesis and Characterization of Polydentate C3 Symmetric Ligand Systems in Metal Coordination
(2019-06-03)Tripodal ligand systems are of key interest in the synthesis of new and promising metal complexes since their tridentate coordination sphere can be used to generate a multitude of different bonding motifs with a suitable ... -
Synthesis and coordination chemistry of tetradentate chelators based on ligand-appended G-quadruplex structures
(2016-12-12)In this thesis, the concept of metal base-pairing was adapted for usage with the DNA secondary structure of G-quadruplexes. Apart from the well-known B-DNA double helix, oligonucleotides can form a variety of different ... -
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 ... -
Synthesis and investigation of frustrated Honeycomb lattice iridates and rhodates
(2014-08-11)Iridates have attracted considerable interest in the last few years due to their potential to host novel electronic and magnetic phases mediated by the combination of strong spin orbit coupling and electronic correlations. ... -
Synthesis and Investigation of Nucleobase Functionalized β-Peptide as SNAREs Model System for Membranefusion
(2015-07-22)In this work, the novel simplified SNARE-mimicking systems consisting of TMD/linker segments of the natural membrane-bound SNARE proteins (syntaxin-1A and synaptobrevin 2) with a nucleobase functionalized β-peptide (β-PNA) ... -
Synthesis and Magnetic Properties of Polyimidosulfur- and Bis(benzoxazolyl)methanide-ligated Complexes
(2022-09-30)The properties of magnetic molecules are promising centerpieces in various fields of research directed toward novel technologies, ranging from quantum computing, high-density data storage systems, and medical imaging ... -
Synthesis and Reactivity of Rare Earth Metals Complexes with a Nitrogen Donor Ligand. Compounds in Formal Low Oxidation States
(2003-06-30)This work presents the synthesis and characterization of dihalogeno derivatives of the rare earth metals with the monoanionic ligand L (L = Et2NCH2CH2NC(Me)CHC(Me)NCH2CH2NEt2) free of coordinating solvent molecules or ...