Jednojaderné Co(II) komplexy s koordinační geometrií na pomezí hexa a heptakoordinace: magnetické a strukturní vlastnosti.

Ondřej František FELLNER

Bachelor's thesis

Mononuclear Co (II) complexes with the coordination geometry on the border between hexa and hepta coordination: magnetic and structural properties.

Abstract:

Tato práce se zabývá přípravou, strukturní a magnetickou charakterizací koordinačních sloučenin Co(II) na pomezí hexa a heptakoordinace. Byly studovány nové komplexní sloučeniny typu [Co(bq)(NO3)2(solv)], kde bq je N-donorový ligand 2,2'-bichinolin, NO3 je O-donorový nitrato ligand a solv je O-donorový alkoholový ligand použitého rozpouštědla a dále již známé [Co(neo)(NO3)2(H2O)], kde neo je neokuproin, a [Co(bpy)(NO3)2(ACN)], kde bpy je 2,2'-bipyridin a ACN je N-donorový ligand acetonitril, u kterého byl připraven nový polymorf. Všechny připravené látky byly charakterizovány pomocí elementární a strukturní analýzy. Dále u šesti nově připravených struktur [Co(bq)(NO3)2(solv)] byla provedena magnetická měření a tři z nich jsou polem indukované jednomolekulové magnety.

Abstract:

This bachelor thesis deals with preparation, structural and magnetic characterization of coordination complexes Co(II) with coordination number on the border between six and seven. New coordination complexes with general formula [Co(bq)(NO3)2(solv)], where bq is 2,2'-biquinoline, NO3 is O-donor nitrato ligand and solv is O-donor ligand of used alcohol solvent were studied. Futhermore, we performed a study of known coordination complexes with general formula [Co(neo)(NO3)2(H2O)], where neo is neocuproin and [Co(bpy)(NO3)2(ACN)], where bpy is 2,2'-bipyridine and ACN is N-donor ligand acetonitrile, which was prepared as a new polymorph. All of the prepared coordination complexes were characterized by elementary analysis and single-crystal or powder X-ray diffraction. Moreover, six prepared compounds [Co(bq)(NO3)2(solv)] were analyzed and measured by DC and AC magnetometry. Three of these compounds exhibit field-induced single molecule magnet behaviour.

Keywords

magnetismus, jednomolekulové magnety, kobalt

Language used: Czech

Date on which the thesis was submitted / produced: 4. 5. 2018

Thesis defence

• Supervisor: Ing. Ivan Nemec, Ph.D.

PALACKÝ UNIVERSITY OLOMOUC

Faculty of Science

Bachelor programme / field:
Chemistry / Chemistry