dc.contributor.author | Kitos, Alexandros A. | en |
dc.contributor.author | Efthymiou, Constantinos G. | en |
dc.contributor.author | Papatriantafyllopoulou, Constantina | en |
dc.contributor.author | Nastopoulos, Vassilios | en |
dc.contributor.author | Tasiopoulos, Anastasios J. | en |
dc.contributor.author | Manos, Manolis J. | en |
dc.contributor.author | Wernsdorfer, W. | en |
dc.contributor.author | Christou, George | en |
dc.contributor.author | Perlepes, Spyros P. | en |
dc.creator | Kitos, Alexandros A. | en |
dc.creator | Efthymiou, Constantinos G. | en |
dc.creator | Papatriantafyllopoulou, Constantina | en |
dc.creator | Nastopoulos, Vassilios | en |
dc.creator | Tasiopoulos, Anastasios J. | en |
dc.creator | Manos, Manolis J. | en |
dc.creator | Wernsdorfer, W. | en |
dc.creator | Christou, George | en |
dc.creator | Perlepes, Spyros P. | en |
dc.date.accessioned | 2019-11-21T06:19:58Z | |
dc.date.available | 2019-11-21T06:19:58Z | |
dc.date.issued | 2011 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/55684 | |
dc.description.abstract | The initial employment of 2-acetylpyridine, (py)(Me)CO, in Co cluster chemistry is reported, and the synthesis, crystal structure, and full magnetic study of [Co7(OH)6(L)6](ClO4) 3·1.6H2O (1·1.6H2O) are described | en |
dc.description.abstract | L- is the anion of 2-(pyridine-2-yl)pentane-2-ol-4-one, (py)(Me)C(CH2COCH3)(O)-, formed in situ through a crossed-aldol reaction in acetone under strongly basic conditions. The reaction of Co(ClO4)2·6H2O, (py)(Me)CO and NBun 4OMe (1:1:1.2) in acetone at room temperature under aerobic conditions affords 1·1.6H2O in 35% yield. The mixed-valent cation possesses a wheel-shaped (or disk-like) structural motif comprising a central octahedral CoIII atom linked to six peripheral distorted octahedral CoII atoms by six μ3- ΟΗ- groups | en |
dc.description.abstract | the six CoII atoms on the rim are held together by six η1:η1:η1: μ2·L- ligands and the oxygen atoms of the hydroxo groups. Variable-temperature, solid-state dc and ac magnetic susceptibility studies were carried out on 1. The dc magnetic study of 1 shows a decline in the product χΜT with decreasing T. The observation of out-of phase (χ″Μ) ac susceptibility signals below ∼4 K suggests that the CoIIICoII 6 complex may be a single molecule magnet, and this was confirmed by single-crystal magnetization vs. dc field sweeps down to 0.04 K that exhibited hysteresis. The study reveals that each complex cation is a weak single-molecule magnet, but that there are also intermolecular interactions (also confirmed crystallographically) to create a 3D ordered lattice | en |
dc.description.abstract | this still gives some hysteresis at 5 K. © 2011 Elsevier B.V. All rights reserved. | en |
dc.source | Polyhedron | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-82255193988&doi=10.1016%2fj.poly.2011.02.013&partnerID=40&md5=1588ad47b885cd258f7aa7523ed995c6 | |
dc.subject | Magnetic properties | en |
dc.subject | 2-(Pyridine-2-yl)pentane-2-olate-4-one ligand | en |
dc.subject | Cobalt single-molecule magnets | en |
dc.subject | Crossed-aldol reaction | en |
dc.subject | Heptanuclear Co IICoIII 6 clusters | en |
dc.subject | Ligands' transformations | en |
dc.title | The search for cobalt single-molecule magnets: A disk-like Co IIICoII 6 cluster with a ligand derived from a novel transformation of 2-acetylpyridine | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1016/j.poly.2011.02.013 | |
dc.description.volume | 30 | |
dc.description.issue | 18 | |
dc.description.startingpage | 2987 | |
dc.description.endingpage | 2996 | |
dc.author.faculty | 002 Σχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied Sciences | |
dc.author.department | Τμήμα Χημείας / Department of Chemistry | |
dc.type.uhtype | Article | en |
dc.source.abbreviation | Polyhedron | en |
dc.contributor.orcid | Tasiopoulos, Anastasios J. [0000-0002-4804-3822] | |
dc.contributor.orcid | Papatriantafyllopoulou, Constantina [0000-0002-5652-7747] | |
dc.contributor.orcid | Nastopoulos, Vassilios [0000-0003-4190-1342] | |
dc.contributor.orcid | Kitos, Alexandros A. [0000-0002-1431-3206] | |
dc.gnosis.orcid | 0000-0002-4804-3822 | |
dc.gnosis.orcid | 0000-0002-5652-7747 | |
dc.gnosis.orcid | 0000-0003-4190-1342 | |
dc.gnosis.orcid | 0000-0002-1431-3206 | |