dc.contributor.author | Moushi, Eleni E. | en |
dc.contributor.author | Lampropoulos, Christos | en |
dc.contributor.author | Wernsdorfer, W. | en |
dc.contributor.author | Nastopoulos, Vassilios | en |
dc.contributor.author | Christou, George | en |
dc.contributor.author | Tasiopoulos, Anastasios J. | en |
dc.creator | Moushi, Eleni E. | en |
dc.creator | Lampropoulos, Christos | en |
dc.creator | Wernsdorfer, W. | en |
dc.creator | Nastopoulos, Vassilios | en |
dc.creator | Christou, George | en |
dc.creator | Tasiopoulos, Anastasios J. | en |
dc.date.accessioned | 2019-11-21T06:21:37Z | |
dc.date.available | 2019-11-21T06:21:37Z | |
dc.date.issued | 2010 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/55878 | |
dc.description.abstract | The syntheses, crystal structures, and magnetic properties of a new family of heterometallic Mn40Na4 and homometallic Mn44 loop-of-loops aggregates are reported. The reactions of [Mn3O(O 2CMe)6(py)3]•py with 1,3-propanediol (pdH2) and 2-methyl-1,3-propanediol (mpdH2) in the presence of NaN3 afforded [Mn10Na(μ3-O) 2(O2CMe)13(pd)6(py) 2]4 (1)4 and [Mn10Na(μ 3-O)2(O2CMe)13(mpd) 6(py)(H2O)]4 (2)4, respectively. Mn40Na4 complexes (1)4 and (2)4 consist of four Mn10 loops linked through Na+ ions to give a supramolecular aggregate with a saddle-like topology. Magnetic characterization of compound (1)4 showed that each Mn10 loop has an S = 4 ground-state spin and displays frequency-dependent in-phase and out-of-phase ac susceptibility signals. It also exhibits hysteresis loops that, however, are not typical of single-molecule magnets (SMMs) due to the existence of interloop interactions between the neighboring Mn10 units of (1)4 through the diamagnetic Na+ ions, and also intermolecular interactions between different Mn40Na4 aggregates. The magnetically discrete Mn44 analogue was targeted with high priority and finally prepared from the reaction of [Mn3O(O 2CMe)6(py)3]•py with pdH2 in the presence of Mn(ClO4)2•6H2O. The loop-of-loops structure of [Mn44(μ3-O) 8(O2CMe)52(pd)24(py) 8](ClO4)(OH)3 (3) is essentially identical to those of (1)4 and (2)4, with the most significant difference being that the four Na+ ions of (1)4 and (2)4 have been replaced with Mn2+ ions. Compound 3 is thus best described magnetically as a Mn44 cluster. In accord with this description and the stronger exchange coupling between the four Mn10 loops expected through the connecting Mn2+ ions, magnetic susceptibility measurements revealed that 3 has an S = 6 ground-state spin and displays frequency-dependent in-phase and out-of-phase ac signals. Magnetization vs dc field sweeps on single-crystals of 3 displayed scan rate- and temperature-dependent hysteresis loops confirming that complex 3 is a new SMM, and is thus the second largest Mn cluster and SMM reported to date. © 2010 American Chemical Society. | en |
dc.source | Journal of the American Chemical Society | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-78449247827&doi=10.1021%2fja106666h&partnerID=40&md5=23cc75374dfe4420afcd6d0bfae18604 | |
dc.subject | article | en |
dc.subject | chemical analysis | en |
dc.subject | synthesis | en |
dc.subject | Manganese | en |
dc.subject | In-phase | en |
dc.subject | Manganese compounds | en |
dc.subject | Metallic compounds | en |
dc.subject | Aggregates | en |
dc.subject | Magnetization | en |
dc.subject | Magnetic susceptibility | en |
dc.subject | magnetism | en |
dc.subject | temperature dependence | en |
dc.subject | crystal structure | en |
dc.subject | manganese derivative | en |
dc.subject | structure analysis | en |
dc.subject | Ions | en |
dc.subject | Single crystals | en |
dc.subject | X ray crystallography | en |
dc.subject | Magnetic materials | en |
dc.subject | chemical reaction | en |
dc.subject | crystal | en |
dc.subject | measurement | en |
dc.subject | sodium | en |
dc.subject | Hysteresis | en |
dc.subject | Complexation | en |
dc.subject | Single-molecule magnet | en |
dc.subject | molecule | en |
dc.subject | Temperature dependent | en |
dc.subject | Ground state | en |
dc.subject | Intermolecular interactions | en |
dc.subject | chemical interaction | en |
dc.subject | Magnetic susceptibility measurements | en |
dc.subject | AC signals | en |
dc.subject | AC susceptibility | en |
dc.subject | DC field | en |
dc.subject | Electronic equipment manufacture | en |
dc.subject | Frequency-dependent | en |
dc.subject | Ground-state spins | en |
dc.subject | Heterometallics | en |
dc.subject | Hysteresis loops | en |
dc.subject | Interloop interactions | en |
dc.subject | magnet | en |
dc.subject | Magnetic characterization | en |
dc.subject | metal complex | en |
dc.subject | Mn clusters | en |
dc.subject | Out of phase | en |
dc.subject | Propanediols | en |
dc.subject | Scan rates | en |
dc.subject | single molecule magnetism | en |
dc.subject | Single-molecule | en |
dc.subject | sodium ion | en |
dc.subject | Superalloys | en |
dc.subject | Supramolecular aggregates | en |
dc.subject | supramolecular chemistry | en |
dc.subject | tetramer | en |
dc.title | Inducing single-molecule magnetism in a family of loop-of-loops aggregates: Heterometallic Mn40Na4 clusters and the homometallic Mn44 analogue | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1021/ja106666h | |
dc.description.volume | 132 | |
dc.description.issue | 45 | |
dc.description.startingpage | 16146 | |
dc.description.endingpage | 16155 | |
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 :84</p> | en |
dc.source.abbreviation | J.Am.Chem.Soc. | en |
dc.contributor.orcid | Tasiopoulos, Anastasios J. [0000-0002-4804-3822] | |
dc.contributor.orcid | Nastopoulos, Vassilios [0000-0003-4190-1342] | |
dc.contributor.orcid | Lampropoulos, Christos [0000-0001-9065-1453] | |
dc.gnosis.orcid | 0000-0002-4804-3822 | |
dc.gnosis.orcid | 0000-0003-4190-1342 | |
dc.gnosis.orcid | 0000-0001-9065-1453 | |