Synthesis, structural characterization and magnetic behaviour of a family of [CoIII2LnIII2] butterfly compounds. Issue 10 (27th February 2017)

• Record Type: Journal Article
• Authors: Funes, Alejandro V.; Carrella, Luca; Rechkemmer, Yvonne; van Slageren, Joris; Rentschler, Eva; Alborés, Pablo
• Is Part Of: Dalton transactions. Volume 46:Issue 10(2017)
• Page Start: 3400
• Page End: 3409
• Publication Date: 2017-02-27
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c6dt04713k
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : We report a family of butterfly-like [CoIII2LnIII2] complexes with Ln = Gd, Tb, Dy, Ho, Er and Yb. All of them are isostructural but the complex with Ln = Gd strings in a one dimensional chain. The Dy member shows slow relaxation of magnetization under zero DC applied field, while all the others only after a small DC field is applied. Abstract : We have successfully prepared and structurally characterized a family of butterfly-like [CoIII2LnIII2] complexes where all magnetic properties are due to the Ln(iii ) ions. The complexes with Ln = Tb(1 ), Dy(2 ), Ho(3 ), Er(4 ) and Yb(5 ) are iso-structural. An exception is the complex with Ln = Gd(6 ) which strings in a one dimensional chain. The structural similarity together with the high tendency of the crystallites to align under an applied magnetic field allowed an overall DC magnetic data treatment to extract phenomenological crystal field parameters and hence to determine the ground state multiplet energy level splitting. The Dy(iii ) member is the only one showing slow relaxation of magnetization under zero DC applied field, while all the others need a small DC applied field.