rok 2006 - Fakulta chemickej a potravinárskej technológie ...
rok 2006 - Fakulta chemickej a potravinárskej technológie ...
rok 2006 - Fakulta chemickej a potravinárskej technológie ...
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MVTS Project No NEM/Slov/DAAD/Darm05 Magneto-structural relationships for novel<br />
substances and materials (Roman Boča).<br />
New type of the magnetostructural correlation in mononuclear complexes has been outlined; magnetic anisotropy<br />
parameter D (that is the axial zero-field splitting) correlates with the structural distortion given by the departure of<br />
the chromophore from the octahedral symmetry. This knowledge could be of a key importance for a rational<br />
design of single-molecule magnets and a fine tuning of their properties.<br />
See: R. Ivaniková, R. Boča, L. Dlháň, H. Fuess, A. Mašlejová, V. Mrázová, I. Svoboda, J. Titiš:<br />
Polyhedron 25 (<strong>2006</strong>) 3261-3268.<br />
Heteroleptic nickel(II) complexes formed of N-donor bases, carboxylic acids, and water: Magnetostructural<br />
correlations<br />
Project duration: from 01. 01. 2005 to 31. 12. 2007<br />
MVTS Project No NEM/Slov/DFG/CH Molecular Electronic Multistability (Roman Boča).<br />
Spin crossover phenomenon was studied by several experimental techniques: SQUID magnetometry and<br />
Moessbauer spectroscopy on novel polynuclear substances. The prepared iron(II) and Fe(III) complexes show a<br />
temperature-induced spin crossover. In the case of dinuclear and polynuclear complexes a stepwise process is<br />
relevant (multistep spin crossover).<br />
Project duration: from 01. 01. 2002 to 31. 12. 2007<br />
APVT Project No 20-005204 Magnetostructural Correlations in Unconventional Magnetic<br />
Materials (Roman Boča).<br />
Polynuclear complexes have been sysnthesized and their magnetoactivity investigated in detail. By a<br />
simultaneous analysis of the temperature dependence of the magnetic susceptibility and a field dependence of<br />
the magnetization the key magnetic parameters have been withdrawn: the exchange coupling constant, the axial<br />
zero-field splitting parameter D and the magnetogyric ratio g for individual centers.<br />
See: a) C. G. Efthymiou, C. P. Raptopoulou, A. Terzis, R. Boča, M. Korabic, J. Mrozinski, .S. P. Perlepes, E. G.<br />
Bakalbassis: Eur. J. Inorg. Chem. (<strong>2006</strong>) 2236–2252.<br />
A Systematic Exploration of Nickel(II)/Acetate/Di-2-pyridyl Ketone Chemistry: Neutral and Cationic Tetranuclear<br />
Clusters, and a Novel Mononuclear Complex<br />
b) O. Atakol, R. Boča, I. Ercan, F. Ercan, H. Fuess, W. Haase, R. Herchel: Chem. Phys. Lett. 423 (<strong>2006</strong>) 192–196<br />
Magnetic properties of trinuclear Ni-M-Ni complexes, M = Mn, Co and Ni<br />
Project duration: from 01. 08. 2005 to 31. 12. 2007<br />
ECONET Project (France-Slovakia) Etude par méthode FORC du comportement hystérétique<br />
de solides moléculaires commutables (Roman Boča).<br />
Modeling of the hysteresis behaviour for spin crossover materials has been done. This leads to understadings of<br />
the solid-state cooperativeness that rules the switching from the low-spin to high-spin state and back.<br />
Project duration: from 01. 08. 2005 to 31. 12. <strong>2006</strong><br />
DAAD Project (Germany-Slovakia) Magneto-structural correlations in molecular magnetism<br />
(Roman Boča).<br />
The project is focusing to the magneto-structural correlations in the inorganic materials based on the transition<br />
metal complexes.<br />
See: A. Mašlejová, R. Ivaniková, I. Svoboda, B. Papánková, L. Dlháň, D. Mikloš, H. Fuess, R. Boča: Polyhedron<br />
25 (<strong>2006</strong>) 1823–1830.<br />
Structural characterization and magnetic properties of hexakis(imidazole)nickel(II) bis(formate), bis(chloracetate),<br />
bis(2-chloropropionate) and hexakis(1-methyl-imidazole)nickel(II) chloride dihydrate<br />
Project duration: from 01. 01. <strong>2006</strong> to 31. 12. 2007<br />
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