English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/122666
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:


A novel approach to constructing SMM frameworks using transition metal citrate cubanes

AuthorsForcén-Vázquez, E.; Falvello, Larry R.; Palacio, Fernando; Tomás, Milagros
Issue Date2014
CitationICMM 2014
AbstractThe discovery of Single Molecule Magnets (SMMs) has represented a revolution in the field of molecular magnetism. Many research groups have focused their efforts on the development of new SMMs. For applications, including putative technological applications, however, the further step of arranging those compounds into well-ordered structures still is a pending issue. Coordination chemistry is proving to be a powerful tool for the preparation of polymeric nets of SMMs. As described in a recent review by Clerac, there are very few examples of SMMs arranged in networks. As we propose in this presentation, the number and functional possibilities of SMM networks can readily be increased in the case of citrate cubanes. The transition-metal citrate cubane [M4citrate4]8- is a symmetrical, anionic molecular fragment that possesses twelve partially negatively charged oxygen atoms (and twelve coordinated but reactive oxygen centers) around its periphery. The cobalt variants have proved to be SMMs, as demonstrated by Murrie et al. and by others. Interestingly, all of the negatively charged points on the fragment surface are potential linkage positions for metal atoms whose adhesion can give extended networks with dimensionalities ranging from zero- to three. In this presentation we apply this viewpoint to the previously reported [M4citrate4]8- cubanes with transition metal centres and to new ones, giving compounds with more than 10 different combinations of linkage points. Some of these products present an unexpected variety of magnetic and dynamic phase behaviour, including chemical reactions, phase transitions and proton transport. All of these products have different patterns of peripheral metal-atom linkage to the 12 surface-resident and 12 encrusted oxygen atoms of the cubane fragment. These results show that transition metal citrate cubanes are excellent synthons for the preparation of a potentially boundless family of networks of ordered SMMs with a high probability of finding new magnetic and dynamic properties. A systematic naming scheme for the citrate cubane topology is used to provide simple descriptions of the diverse linkage geometries found to date.
DescriptionResumen del trabajo presentado a la: "14th International Conference on Molecule-Based Magnets" celebrada en San Petersburgo (Rusia) del 5 al 9 de julio de 2014.
Appears in Collections:(ICMA) Comunicaciones congresos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
Show full item record
Review this work

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.