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Iron dinuclear helicate complex assembled by a phothochromic ligand

AuthorsEstrader, Marta ; Salinas-Uber, Jorge; Valldosera, Sandra; Roubeau, Olivier; Aromí, Guillem
Issue Date2014
CitationICMM 2014
AbstractThe interest in photochromic molecules and the study of their conformation changes upon irradiation with light, is motivated mainly by the potential influence of these changes on the molecular physical properties. Indeed, diarylethene based ligands have lately received much attention as they are promising candidates to build magnetic molecular switches. Complexes of such ligands are envisaged to change reversibly their magnetic properties as the diarylethene moiety undergoes the cyclization and vice versa under UV-vis light irradiation. On the other hand, molecular complexes exhibiting spin crossover (SCO) are receiving a renewed interest since it is now possible to control the SCO phenomena not only by temperature but also by other external stimuli such as light or pressure. The majority of SCO complexes are of Fe, and many pyrazolyl-pyridine diimine groups coordinated to the metal are often used. Hence an N-based photochromic ligand with similar pyrazolyl-pyridine moeities might provide multifunctional coordination compounds. To this aim, a new diarylethene based ligand (L) has been synthesized and characterized (Figure 1). The ligand exhibits photoswitching both in solution and in the solid state, changing from brown to purple when the cyclization takes place. This ligand has been used in a coordination reaction with Fe(II) leading to the dinuclear complex helicate in Figure 2. The magnetic and optical properties of this novel multifunctional assembly will be presented.
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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