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Identifier

000423765

Title

Σύνθεση, χαρακτηρισμός και μελέτη μαγνητικών ιδιοτήτων ετεροπυρηνικών πλειάδων Κοβαλτίου και Νικελίου

Alternative Title

Synthesis, characterization and study of magnetic properties of heterometallic Nickel and Cobalt clusters

Author

Μαυρομάγουλος, Αθανάσιος Μ.

Thesis advisor

Μήλιος, Κωνσταντίνος

Reviewer

Τρικαλίτης, Παντελής
Δημάδης, Κωνσταντίνος

Abstract

The field of coordination chemistry continues to attract the interest of many research groups, due to the numerous and promising applications of such species. A rapidly growing field of science related to clusters is the field of molecular magnetism. The purpose of this work was the synthesis and full characterization of 3d-4f complexes, and the study of their magnetic properties. The reactions’ systems we investigated were Ni/Ln/H2L1, Co/Ln/H2L2 and Ni/Ln/H2L2 (H2L1 =(Z)- N',2-dihydroxy-4,6-dimethylnicotinimidamide and H2L2= 3-(hydroxyamino)quinoxalin-2-ol). From these systems we managed to isolate and characterize the following complexes: [Ni2Ln2(HL1)2(L1 zw)2(acac)4(OMe)2].MeOH.4H2O, (Ln= Dy: 1, Y: 2, Gd: 3), [Ni2Dy2(H2L1 zw)2(HL1 zw)2(PhCOO)4(OAc)4].H2O (4), [Ni5Dy2(aib)9(HLzw)2(H2Lzw)(μ3- OH)2MeOH(H2O)2](NO3)3 .4Η2Ο (5), [Ni6Dy4(μ3-OAc)4(μ2-OAc)2(μ3- O)2(HL1 zw)6(L1)4(MeOH)4(H2O)2].2(NaClO4).8MeOΗ.4H2O (6), [CoII 2CoIII 2Ln4(μ3-O)2(μ2- O)2(HL2 zw)6(CH3COO)4(NO3)4(H2O)].2MeOH (Ln= Dy:7, Ln= Y:8), and [Ni3(acac)(OAc)3(H2L2 zw)2(HL2 zw)(H2O)2] (ClO4).3MeCN.4.5H2O (9). Furthermore the magnetic properties of complexes 2, 3, 5, 6 and 7, were investigated, and clusters 6 και 7 were found to display single molecule magnetism behaviour.

Language

Greek

Subject

Coordination chemistry

Molecular magnetism

Μοριακός μαγνητισμός

Χημεία συμπλόκων

Χημεία συναρμογής

Issue date

2019-07-24

Collection

Faculty/Department--Faculty of Sciences and Engineering--Department of Chemistry--Post-graduate theses