title: Rational Organization of Lanthanide-Based SMM Dimers into Three-Dimensional Networks.
abstract: Optimization of the reaction of [Ln(hfac)3]·2H2O and pyridine-N-oxide (PyNO), which is known to afford double-bridged dimers, leads to triple-bridged dimers of formula [(Ln(hfac)3)2(PyNO)3] (Ln = Gd (1), Dy (2)) from which the Dy derivative (2) behaves as a single-molecule magnet (SMM). The pseudo threefold axis symmetry of this zero-dimensional building block makes possible its extension into a tridimensional network. By changing PyNO for 4,4'-bipyridine N,N'-dioxide (4,4'BipyNO) a tridimensional compound of formula {[Ln(hfac)3]2(4,4'BipyNO)2]} (Ln = Eu (3), Gd (4), and Dy (5)) is then rationally obtained. This covalent three-dimensional (3D) network has a remarkably high cell volume (V = 24 419 A(3)) and is an arrangement of interpenetrated 3D subnetworks whose triple-bridged dimers still behave as SMMs.
authors.affiliation: INSA, ISCR, UMR 6226, Université Européenne de Bretagne, 35708 Rennes, France.
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Yi
authors.affiliation: INSA, ISCR, UMR 6226, Université Européenne de Bretagne, 35708 Rennes, France.
authors.forename: Guillaume
authors.initials: G
authors.lastname: Calvez
authors.affiliation: INSA, ISCR, UMR 6226, Université Européenne de Bretagne, 35708 Rennes, France.
authors.forename: Carole
authors.initials: C
authors.lastname: Daiguebonne
authors.affiliation: INSA, ISCR, UMR 6226, Université Européenne de Bretagne, 35708 Rennes, France.
authors.forename: Olivier
authors.initials: O
authors.lastname: Guillou
authors.affiliation: INSA, ISCR, UMR 6226, Université Européenne de Bretagne, 35708 Rennes, France.
authors.forename: Kevin
authors.initials: K
authors.lastname: Bernot