<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "High-frequency / High-field Electron Paramagnetic Resonance Investigations on Metal-Organic Molecular Compounds"^^ . "In this thesis detailed studies of the magnetic properties of different metal-organic\r\nmolecular compounds are presented. The experimental investigations are mainly\r\nperformed by high-frequency / high-field electron paramagnetic resonance (HF\r\nEPR) spectroscopy in an external magnetic field up to 16 T, accompanied by\r\ndirect (dc) or alternating current (ac) susceptibility measurements. The results\r\nallowed to precisely determine the anisotropy parameters for a set of tetrahedrally\r\ncoordinated Co(II) compounds with the general formula [Co(L1)4]X2, and\r\nthereby deliver a direct experimental proof for the influence of the second coordination\r\nsphere on the magnetic properties of the respective complexes. On the\r\nother hand, strong zero-field splitting induced by a highly axial anisotropy for an\r\noctahedrally coordinated mononuclear Co(II) complex was determined by pulsed\r\nfield magnetisation measurements up to 55.5 T. The influence of the spatial coordination\r\ngeometry on the g-anisotropy and slow relaxation of magnetisation\r\nbehaviour was studied by the investigation of two isomeric Co(II) low spin (S =\r\n1/2) complexes in a square-pyramidal and trigonal-bipyramidal coordination geometry,\r\nrespectively. For a pentagonal-bipyramidal coordinated V(III) complex\r\n[V(III)(DAPBH)(CH3OH)2] Cl·CH3OH a planar crystal field anisotropy as well as\r\na finite dimer-like intermolecular interaction was quantified by both, HF EPR investigations\r\nand low temperature magnetisation measurements. The exploration\r\nof small intermolecular coupling pathways is further a comprehensive thread running\r\nthrough the study of all the aforementioned complexes. In a second part\r\n4f rare earth metal containing compounds are addressed. The evaluation of ac\r\nsusceptibility data on the monomeric Dy(III) compound [DyIIIL1]OTf reveal an\r\ninteresting two step magnetic relaxation. The magnetic relaxation behaviour also\r\nmotivated a comparative HF EPR study on two novel Er(III) complexes figuring\r\na pentagonal-bipyramidal coordination surrounding. In this context it was found\r\nthat the differences in magnetic relaxation behaviour can directly be traced back\r\nto the changes in electronic structure induced by the crystal field. Beyond the\r\ninvestigation of monomeric 3d or 4f complexes, the coupling between those two\r\nspecies of magnetic ions is studied and quantified by HF EPR investigations on\r\na Cu(II)-Ln-Cu(II) sample set with Ln = Gd, Tb, Dy and La."^^ . "2022" . . . . . . . "Lena"^^ . "Spillecke"^^ . "Lena Spillecke"^^ . . . . . . "High-frequency / High-field Electron Paramagnetic Resonance Investigations on Metal-Organic Molecular Compounds (PDF)"^^ . . . "Dissertation_Lena_Spillecke.pdf"^^ . . . "High-frequency / High-field Electron Paramagnetic Resonance Investigations on Metal-Organic Molecular Compounds (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "High-frequency / High-field Electron Paramagnetic Resonance Investigations on Metal-Organic Molecular Compounds (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "High-frequency / High-field Electron Paramagnetic Resonance Investigations on Metal-Organic Molecular Compounds (Other)"^^ . . . . . . "preview.jpg"^^ . . . "High-frequency / High-field Electron Paramagnetic Resonance Investigations on Metal-Organic Molecular Compounds (Other)"^^ . . . . . . "medium.jpg"^^ . . . "High-frequency / High-field Electron Paramagnetic Resonance Investigations on Metal-Organic Molecular Compounds (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #31169 \n\nHigh-frequency / High-field Electron Paramagnetic Resonance Investigations on Metal-Organic Molecular Compounds\n\n" . "text/html" . . . "530 Physik"@de . "530 Physics"@en . .