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Identifier 000383323
Title Σύνθεση, χαρακτηρισμός και μελέτη συμπλόκων του Μαγγανίου (ΙΙΙ) με οξιμάτο υποκαταστάτες
Alternative Title Synthesis, characterization and studies of manganese complexes with oximate ligands
Author Καλοφωλιάς, Δημήτρης
Select a value Πανεπιστήμιο Κρήτης,
Abstract In the present work the employment of the 5-bromo-salicylaldehyde, a new oxime ligand in Mn(III) chemistry was investigated. In total, 3 new hexanuclear manganese complexes with the [MnIII3O(R-sao) 3 (sol) 3-4] building block were isolated and characterized: [Mn66(Br-sao) 6 (OAc) 2O2 (H2O) 2 (EtOH) 2] (9), [Mn6Na2 (Br-sao) 6 (PhCOO) 4O2 (Η2Ο) 2 (EtOH)4]. 2EtOH (10.2EtOH), and [Mn6(Br-sao) 6 (piv) 2O2 (H2O) 2 (EtOH) 2].3EtOH (11.3EtOH). The complexes were characterized by single-crystal X-ray crystallography, elemental analysis and both dc and ac magnetic susceptibility measurements under an applied dc field of 1000 G and ac magnetic field of 500-1000 Hz frequency range, respectively. The dc magnetic susceptibility studies for all complexes revealed dominant antiferromagnetic interactions within the metallic centers. Furthermore, ac magnetic susceptibility studies revealed the Single-Molecule Magnetism behavior for complex 11.3EtOH. All three new complexes agree with the previously reported magneto-structural correlation regarding trinuclear and hexanuclear oxo-centered oximate [MnIII3O(R-sao) 3 (sol) 3-4] based Mn(III) complexes, where R-saoH2 is an oximic analog of the salicyaldehydes, Me-saoH2, Et-saoH2 and Ph-saoH2. These results further establish and extend the reported magnetostructural correlation for the above mentioned species.
Language Greek
Subject Single molecule magnets
Μαγνήτες μοναδιαίου μορίου
Σύμπλοκα Μαγγανίου
Issue date 2014-03-28
Collection   School/Department--School of Sciences and Engineering--Department of Chemistry--Post-graduate theses
  Type of Work--Post-graduate theses
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