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Design and synthesis of photo-switchable magnetic coordination complexes

AuthorsSalinas-Uber, Jorge; Roubeau, Olivier; Aromí, Guillem
Issue Date2014
CitationICMM 2014
AbstractA fascinating goal in coordination chemistry is to manipulate magnetic properties of complexes photochemically. This potential could find applications in important areas, such as that of spin-based quantum computing. Indeed, molecules exhibiting well defined spins separated by a photswitchable moiety could serve as prototypes of a SWAP quantum gate if the interaction between both spins can be controlled by light irradiation in a similar way as proposed for an electrically controlled spin-based gate. We have designed and synthesized new ligands to assemble, weakly coupled pairs of clusters in a single molecule. In addition, these ligands possess a photochromic unit, able to switch the quantum correlation between both spins through light. Ligands with different R groups have been prepared. When R=hydroxyphenyl (H4L1) its reactions with transition metals (Co, Ni, Cu) yield a family of tetranuclear compounds in form of pairs of dimers, [M4(L1)2(py)6] (Figure, left). We had demonstrated previously that the differences in both coordination pockets present in L1 could be employed for the synthesis of pure heterometallic compounds of the type [MM’···M’M], through site-selective control. Photocyclization of L1 is carried out using UV light and reversed with visible light. This phenomenon is also observed for the corresponding clusters. We shall present the structural, magnetic and optical properties of this new family of compounds and evaluate their potential as prototypes of SWAP quantum gates.
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
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