title: Dimers and chains of {3d-4f} single molecule magnets constructed from heterobimetallic tectons.
abstract: A tetranuclear complex and a 1-D coordination polymer with a ladder-like topology have been obtained by connecting [Ni(II)Dy(III)] nodes with dicarboxylato ligands: [Ni₂(valpn)₂Dy₂(III)(pdca)₂(NO₃)(H₂O)₆](NO₃)·4H₂O 1, and (∞)¹[Ni₂(H₂O)₂(valpn)₂Dy₂(tfa)₃]·4CH₃CN 2 (valpn²⁻ = the dianion of the Schiff base resulting from reacting o-vanillin with 1,3-propanediamine; pdca²⁻ = the dianion of 2,6-pyridinedicarboxylic acid; tfa²⁻ = the dianion of the terephthalic acid). The magnetic measurements show a ferromagnetic interaction between Ni(II) and Dy(III), and that both compounds behave like SMM with strong tunnelling. The barrier of 2 (17.4 K) is higher than that of 1 (13.6 K).
authors.affiliation: Inorganic Chemistry Laboratory, Faculty of Chemistry, University of Bucharest, Str. Dumbrava Rosie nr. 23, 020464, Bucharest, Romania.
authors.forename: Traian D
authors.initials: TD
authors.lastname: Pasatoiu
authors.forename: Mael
authors.initials: M
authors.lastname: Etienne
authors.forename: Augustin M
authors.initials: AM
authors.lastname: Madalan
authors.forename: Marius
authors.initials: M
authors.lastname: Andruh
authors.forename: Roberta
authors.initials: R
authors.lastname: Sessoli