Título:
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Different topologies in three manganese-μ-azido 1D compounds: magnetic behavior and DFT-quantum Monte Carlo calculations
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Autor/a:
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Mautner, F. A.; Berger, Christian; Scherzer, Michael; Fischer, Roland C.; Maxwell, Lindley; Ruiz Sabín, Eliseo; Vicente Castillo, Ramón
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Otros autores:
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Universitat de Barcelona |
Abstract:
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The syntheses and structural characterization of three new monodimensional azido-bridged manganese(II) complexes with empirical formulae [Mn(N3)2(aminopyz)2]n (1), [Mn(N3)2(4-azpy)2]n (2) and [Mn(N3)2(4-Bzpy)2]n (3) (pyz = pyrazine (1,4-diazine)), 4-azpy = 4-azidopyridine and 4-Bzpy = 4-benzoylpyridine) are reported. 1 is a monodimensional compound with double EO azido bridges, 2 is an alternating monodimensional compound with double end-on and double end-to-end azido bridges in the sequence di-EO-di-EE and 3 is a monodimensional compound with double end-on and double end-to-end azido bridges in the sequence di-EO-di-EO-diEO-di-EO-di-EE. The magnetic properties of 1-3 are reported. Periodic DFT calculations were performed to estimate the J values and quantum Monte Carlo simulations were carried out using the calculated J values to check their accuracy in comparison with the experimental magnetic measurements. From this theoretical analysis, two appealing features of the di-EO Mn(II) compounds can be extracted: first, the exchange coupling becomes more ferromagnetic when the Mn-N-Mn bridging angle becomes larger and the spin density of the bridging nitrogen atoms has an opposite sign to that of the Mn(II) centers. |
Materia(s):
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-Magnetisme -Manganès -Mètode de Montecarlo -Síntesi orgànica -Magnetism -Manganese -Monte Carlo method -Organic synthesis |
Derechos:
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cc-by (c) Mautner et al., 2015
http://creativecommons.org/licenses/by/4.0 |
Tipo de documento:
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Artículo Artículo - Versión publicada |
Editor:
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Royal Society of Chemistry
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