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.
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Showing 1 to 8 of 8 for “"Second Coordination Sphere"”.
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NMR Linebroadening and Contact Shift Studies of Transition Metal Complexes in Nonaqueous Solvents.
… in the temperature range of 20° - 50°C was a second - coordination sphere exchange process. Above 70°C, the dominant process was a mixture of first coordination sphere exchange process of partially +3 dissociated Cr(en) 3+3 and second coordination sphere T2m-1 relaxation. The kinetic …
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SECONDARY INTERACTIONS WHICH MODIFY REDOX AND OTHER PROPERTIES OF ORGANOMETALLIC SYSTEMS
Second coordination sphere interactions of metal centres involving hydrogen bonding, ion-pairing or dipolar bonding can play an important role in determining the physical and chemical properties of molecular and biomolecular systems. For example, the redox potentials of cubane iron-sulfur clusters …
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Synthesis and reactivity studies of mono-, bi-, and trimetallic complexes supported by oxidatively-resistant polyanionic ligands
… the carboxamide N-H groups of the pre-organized second-coordination sphere. The cobalt(II) complex serves as a selective colorimetric turn-on fluoride sensor and represents a unique example of a transition-metal based fluoride sensor where fluoride binding takes place directly at the transition …
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Auxiliary proton-influenced metal-mediated reactions: dioxygen activation, anion coordination, and catalysis
… of hydrogen-bonding groups into the second coordination sphere of Cu complexes have revealed that O2 reactivity is enhanced in the presence of these functional groups. The effects of intramolecular hydrogen-bonding on the oxygen affinity of CuN3+ derivatives, where N3 = …
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Generating artificial metalloenzymes containing new-to-nature organometallic cofactors via controlled ligand exchange and microfluidic screening technologies
… ensuring an intimate link between the first and second coordination-sphere, with the latter being dictated by the protein fold. Further, the development of a high-throughput microfluidic screening platform is presented, with the aim to facilitate efficient directed evolution. The first chapter …
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Isolating, characterizing, and engineering novel Cu-proteins and peroxidases
… on the role of subtle changes of residues in the secondary coordination sphere of the metal ion, an underexplored area of study. I use protein engineering techniques not only to shed light on the mechanisms underlying such changes, but also to design new functionalities within our scaffold …
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N-Ligand Stabilized Lanthanide Complexes
… the two amido ligands. A similar overall primary coordination site bulkiness for both ligands and distinct differences regarding this bulkiness for different directions were observed. A better shielding of the second coordination sphere was observed for the aminopyridinate. Based on their steric …
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Metalloenzymes required for glycan processing and morphological development in Streptomyces lividans
… switch occurs with the concomitant production of secondary metabolites, many of which have pharmaceutical properties. For the industrially used strain S. lividans this switch is dependent on the bioavailability of copper (Cu) in the environment. This thesis has explored the relationship between …