Photoswitching of the antiferromagnetic coupling in an oxamato-based dicopper(ii) anthracenophane.

María Castellano (1) , Jesús Ferrando-Soria (1) , Emilio Pardo (1) , Miguel Julve (1) , Francesc Lloret (1) , Corine Mathonière (2) , Jorge Pasán (3) , Catalina Ruiz-Pérez (3) , Laura Cañadillas-Delgado (3, 4, 5) , Rafael Ruiz-García (1, 6) , Joan Cano (1, 6)

1 ICMol - Instituto de Ciencia Molecular
2 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
3 Laboratorio de Rayos X y Materiales Moleculares
4 ILL - Institut Laue-Langevin
5 ICMA-CSIC - Instituto de Ciencia de Materiales de Aragón [Saragoza, España]
6 FGUV - Fundació General de la Universitat de València

Thermally reversible photomagnetic (ON/OFF) switching behavior has been observed in a dinuclear oxamatocopper(ii) anthracenophane upon UV light irradiation and heating; the two Cu(II) ions (S(Cu) = 1/2) that are antiferromagnetically coupled in the dicopper(ii) metallacyclic precursor (ON state) become uncoupled in the corresponding [4+4] photocycloaddition product (OFF state), as substantiated from both experimental and theoretical studies.

Domaines: Matériaux

María Castellano, Jesús Ferrando-Soria, Emilio Pardo, Miguel Julve, Francesc Lloret, et al.. Photoswitching of the antiferromagnetic coupling in an oxamato-based dicopper(ii) anthracenophane.. Chemical Communications, 2011, 47 (39), pp.11035-11037. ⟨10.1039/c1cc15087a⟩. ⟨hal-00634275⟩