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| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Kitos, A. A. | en |
| dc.contributor.author | Efthymiou, C. G. | en |
| dc.contributor.author | Papatriantafyllopoulou, C. | en |
| dc.contributor.author | Nastopoulos, V. | en |
| dc.contributor.author | Tasiopoulos, A. J. | en |
| dc.contributor.author | Manos, M. J. | en |
| dc.contributor.author | Wernsdorfer, W. | en |
| dc.contributor.author | Christou, G. | en |
| dc.contributor.author | Perlepes, S. P. | en |
| dc.date.accessioned | 2015-11-24T16:51:11Z | - |
| dc.date.available | 2015-11-24T16:51:11Z | - |
| dc.identifier.issn | 0277-5387 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/9701 | - |
| dc.rights | Default Licence | - |
| dc.subject | cobalt single-molecule magnets | en |
| dc.subject | crossed-aldol reaction | en |
| dc.subject | heptanuclear (coco6iii)-co-ii clusters | en |
| dc.subject | ligands transformations | en |
| dc.subject | magnetic properties | en |
| dc.subject | 2-(pyridine-2-yl)pentane-2-olate-4-one | en |
| dc.subject | ligand | en |
| dc.subject | high-spin molecules | en |
| dc.subject | manganese carboxylate chemistry | en |
| dc.subject | mixed-valence cobalt(ii/iii) | en |
| dc.subject | 2-pyridyl ketone oxime | en |
| dc.subject | di-2-pyridyl ketone | en |
| dc.subject | coordination polymer | en |
| dc.subject | crystal-structures | en |
| dc.subject | ground-state | en |
| dc.subject | mn-cluster | en |
| dc.subject | complexes | en |
| dc.title | The search for cobalt single-molecule magnets: A disk-like (CoCo6II)-Co-III cluster with a ligand derived from a novel transformation of 2-acetylpyridine | en |
| heal.type | journalArticle | - |
| heal.type.en | Journal article | en |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.identifier.primary | DOI 10.1016/j.poly.2011.02.013 | - |
| heal.identifier.secondary | <Go to ISI>://000298522800006 | - |
| heal.identifier.secondary | http://ac.els-cdn.com/S0277538711000957/1-s2.0-S0277538711000957-main.pdf?_tid=69a02f66-3636-11e3-a0e8-00000aacb361&acdnat=1381909488_11c6532f82feac2e4246624bded1d628 | - |
| heal.language | en | - |
| heal.access | campus | - |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας | el |
| heal.publicationDate | 2011 | - |
| heal.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 [Co-7(OH)(6)(L)(6)](ClO4)(3)center dot 1.6H(2)O (1.1.6H(2)O) are described: 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)center dot 6H(2)O, (POMe)CO and (NBu4OMe)-O-II (1:1:1.2) in acetone at room temperature under aerobic conditions affords 1.1.6H(2)O in 35% yield. The mixed-valent cation possesses a wheel-shaped (or disk-like) structural motif comprising a central octahedral Co-III atom linked to six peripheral distorted octahedral Co-II atoms by six mu(3)-OII- groups: the six Co-II atoms on the rim are held together by six eta(1):eta(1):eta(1):mu(2).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 chi(T)(M) with decreasing T. The observation of out-of phase (chi ''(M)) ac susceptibility signals below similar to 4 K suggests that the CoIIICo6II 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: this still gives some hysteresis at 5 K. (C) 2011 Elsevier Ltd. All rights reserved. | en |
| heal.publisher | Elsevier | en |
| heal.journalName | Polyhedron | en |
| heal.journalType | peer reviewed | - |
| heal.fullTextAvailability | TRUE | - |
| Appears in Collections: | Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά). ΧΗΜ | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Kitos-2011-The search for cobal.pdf | 1.27 MB | Adobe PDF | View/Open Request a copy |
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