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Title:	A first-principles analysis of the magnetism of CuII polynuclear coordination complexes: the case of [Cu4(bpy)4(aspartate)2(H2O)3](ClO4)4·2.5H2O
Author:	Deumal i Solé, Mercè; Ribas Ariño, Jordi; Robb, Michael A.; Ribas Gispert, Joan; Novoa Vide, Juan J.
Other authors:	Universitat de Barcelona
Abstract:	The magnetic structure of the [Cu4(bpy)4(aspartate)2(H2O)3](ClO4)4·2.5 H2Ocrystal - using fractional coordinates determined at room-temperature ¿ has beenanalysed in detail. This analysis has been carried out by extending our first principlesbottom-up theoretical approach, which was initially designed to study through-spacemagnetic interactions, to handle through-bond magnetic interactions. The only input datarequired by this approach are the values of the computed JAB exchange parameters for allthe unique pairs of spin-containing centres. The results allow the magnetic structure ofthe crystal, which presents two types of isolated tetranuclear CuII clusters, to be definedin quantitative terms. Each of these clusters presents ferro and antiferromagneticinteractions, the former being stronger, although outnumbered by the latter. Thecomputed magnetic susceptibility curve shows the same qualitative features as theexperimental data. However, there are small differences that are presumed to beassociated with the use of room-temperature crystal coordinates.
Subject(s):	-Magnetisme -Cristalls moleculars -Química quàntica -Magnetism -Molecular crystals -Quantum chemistry
Rights:	cc-by, (c) Deumal et al., 2004 http://creativecommons.org/licenses/by/3.0/es/
Document type:	Article Article - Published version
Published by:	MDPI Publishing
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