dc.contributor.author | Mishra, Abhudaya | en |
dc.contributor.author | Tasiopoulos, Anastasios J. | en |
dc.contributor.author | Wernsdorfer, W. | en |
dc.contributor.author | Abboud, K. A. | en |
dc.contributor.author | Christou, George | en |
dc.creator | Mishra, Abhudaya | en |
dc.creator | Tasiopoulos, Anastasios J. | en |
dc.creator | Wernsdorfer, W. | en |
dc.creator | Abboud, K. A. | en |
dc.creator | Christou, George | en |
dc.date.accessioned | 2019-11-21T06:21:31Z | |
dc.date.available | 2019-11-21T06:21:31Z | |
dc.date.issued | 2007 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/55862 | |
dc.description.abstract | The syntheses, structures, and magnetic properties are reported of the mixed-metal complexes [Ce4Mn10O10(OMe) 6(O2-CPh)16(NO3)2(MeOH) 2(H2O)2] (1) and [Th6Mn 10O22(OH)2(O2CPh) 16-(NO3)2(H2O)8] (2), which were both prepared by the reaction of (NBun4) [Mn4O2(O2CPh)9(H2O)] (3) with a source of the heterometal in MeCN/MeOH. Complexes 1 and 2 crystallize in the monoclinic space group C2/c and the triclinic space group P1, respectively. Complex 1 consists of 10 MnIII, 2 CeIV, and 2 Ce IV atoms and possesses a very unusual tubular [Ce4Mn 10O10(OMe)6]18+ core. Complex 2 consists of 10 MnIV and 6 ThIV atoms and possesses a [Th6Mn10O22(OH)2]18+ core with the metal atoms arranged in layers with a 2:3:6:3:2 pattern. Peripheral ligation around the cores is provided by 16 bridging benzoates, 2 chelating nitrates, and either (i) 2 each of terminal H2O and MeOH groups in 1 or (ii) 8 terminal H2O groups in 2. Complex 1 is the largest mixed-metal Ce/Mn cluster and the first 3d/4f cluster with mixed-valency in its lanthanide component, while complex 2 is the first Th/Mn cluster and the largest mixed transition metal/actinide cluster to date. Solid-state dc and ac magnetic susceptibility measurements on 1 and 2 establish that they possess S = 4 and 3 ground states, respectively. Ac susceptibility studies on 1 revealed nonzero frequency-dependent out-of-phase (χM″) signals at temperatures below 3 K | en |
dc.description.abstract | complex 2 displays no χM″ signals. However, single-crystal magnetization vs dc field scans at variable temperatures and variable sweep-rates down to 0.04 K on 1 revealed no noticeable hysteresis loops, except very minor ones at 0.04 K assignable to weak intermolecular interactions propagated by hydrogen bonds involving CeIII-bound ligands. Complex 1 is thus concluded not to be a single-molecule magnet (SMM), and the combined results thus represent a caveat against taking such ac signals as sufficient proof of a SMM. © 2007 American Chemical Society. | en |
dc.source | Inorganic chemistry | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-34247881733&doi=10.1021%2fic061946y&partnerID=40&md5=f25779048c620cce7d7fd34d20351c50 | |
dc.title | High-nuclearity Ce/Mn and Th/Mn cluster chemistry: Preparation of complexes with [Ce4Mn10O10(OMe)6] 18+ and [Th6Mn10O22(OH) 2]18+ cores | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1021/ic061946y | |
dc.description.volume | 46 | |
dc.description.issue | 8 | |
dc.description.startingpage | 3105 | |
dc.description.endingpage | 3115 | |
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.description.notes | <p>Cited By :55</p> | en |
dc.source.abbreviation | Inorg.Chem. | en |
dc.contributor.orcid | Tasiopoulos, Anastasios J. [0000-0002-4804-3822] | |
dc.gnosis.orcid | 0000-0002-4804-3822 | |