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Showing 1 to 15 of 15 for “"Cluster Chemistry"”.
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Aspects of group 14 element - transition metal cluster chemistry
… [Fe2(CO)₈]²⁻ and [Fe(CO)₃NO]⁻, no Si-containing clusters were detected amongst the products. The first reaction yielded [FeCo₃(CO)₁₂]⁻ (characterised by infrared spectroscopy and preliminary X-ray diffraction), Co₄(CO)₁₂ and Fe(CO)₅; and the latter reaction, [FeCo₃(CO)₁₂]⁻, Co₄(CO)₁₂ and the …
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Investigating the Cluster Chemistry of α-Methyl-2-pyridine methanol (mpmH) with Select 3d Ions
… describes an investigation of the coordination chemistry of the potentially chiral bridging, chelating ligand, α-methyl-2-pyridinemethanol (mpmH) with select 3d ions for the discovery of polynuclear clusters with single molecule magnet (SMM) properties. Chapter 1 introduces the theory of …
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Use of Oximes and Schiff-bases as Bridging/Chelating Ligands with Select 3d and 3d/4f Ions in Cluster Chemistry and a Mechanistic Insight into the Roles of Transition Metal Ions in the Formation of Tetrazoles
… homometallic 3d- and heterometallic 3d/4f-metal cluster chemistry has afforded a Mn cluster and novel families of Mn/Ln and Cu/Ln complexes. In Chapter 2, the synthesis and characterization of the {MnIIIMnIV2} (1), {GdMnIV2} (2) and {DyMnIV2} (3) compounds resulting from the use of the acndH2 …
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High-Nuclearity Lanthanide(III) Complexes as Single-Molecule Magnets and Luminescent Materials
… acid (sacbH2), in lanthanide (LnIII) cluster chemistry has afforded four families of polynuclear and dinuclear complexes with new structural motifs, and interesting magnetic and optical properties. Chapter 1 deals with most of the fundamental aspects within the areas of polynuclear …
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Coordination Chemistry of Fe–S Clusters Supported by N-Heterocyclic Carbenes
Iron–sulfur clusters are ubiquitous in Nature and carry out some of the most challenging multielectron redox reactions in the biosphere while utilizing three primary building blocks: Fe²⁺, Fe³⁺, and S²⁻. Studying synthetic Fe–S clusters aids in understanding the underlying properties of Fe–S …
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Polynuclear 3d/4f-Metal Complexes as Molecular Magnetic Refrigerants and Single-Molecule Magnets
… dioxime (acndH2), in heterometallic 3d/4f-metal cluster chemistry has yielded two new families of polynuclear CuII/LnIII clusters. These complexes were found to exhibit interesting magnetic properties, specifically single-molecule magnetism and the magnetocaloric effect. In this thesis, Chapter 1 …
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Structural studies of metalloenzyme complexes in acetogenic carbon fixation
… enzyme (MeTr), to a nickel-containing metallocluster called the A-cluster of the downstream enzyme, acetyl-CoA synthase (ACS). Such B12-dependent methyl transfer reactions require the construction of large, multimodular enzyme complexes whose threedimensional assemblies are, at present, …
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Ligand Design for Dual Property Single Molecule Magnets
… approaches for the preparation of polynuclear clusters with interesting structural, magnetic and optical properties. Firstly, exploiting p-tert-butylcalix[4]arene (TBC4) macrocycles together with selected Ln(III) ions for the assembly of emissive single molecule magnets, and secondly the …
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Electrospray mass spectrometric analysis of transition metal carbonyl clusters
… Mass Spectrometry (ESMS) within organometallic chemistry, specifically as a technique for investigating transition metal carbonyl cluster chemistry. An initial survey of air-sensitive high-nuclearity rhodium and nickel clusters, such as [Rh9As(C0)21f and [H2Ni!2(CO)iif, demonstrated the …
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Hafnium Metal-Organic Frameworks: Formation Routes and Defect Engineering
… frameworks (MOFs) consist of metal nodes or clusters linked by multidentate organic ligands. By altering the identity of these components, the properties of the MOF can be tuned. Furthermore, combining the versatility of MOFs with the considerable potential of low-dimensional materials like …
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Spectroscopic investigation of nitrogenase: EPR and MCD studies of the FeMo cofactor and the P-cluster
… from an electron delocalized over the entire P-cluster or its return to the Fe protein. The P-cluster is suggested to play a role in the electron transfer from the Fe protein to the cofactor. Apo-proteins were used to provide information about the function and the maturation of the P-cluster. …