Strong direct exchange coupling and single-molecule magnetism in indigo-bridged lanthanide dimers. Issue 21 (28th February 2017)

• Record Type: Journal Article
• Authors: Guo, Fu-Sheng; Layfield, Richard A.
• Is Part Of: Chemical communications. Volume 53:Issue 21(2017)
• Page Start: 3130
• Page End: 3133
• Publication Date: 2017-02-28
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c7cc01046j
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : The first lanthanide–indigo complexes are described, including a dysprosium single-molecule magnet and one of the strongest exchange coupling constants measured in a gadolinium compound. Abstract : The synthesis, structure and magnetic properties of the indigo-bridged dilanthanide complexes [{(η 5 -Cp*)2 Ln}2 (μ-ind)] n − with Ln = Gd or Dy and n = 0, 1 or 2 are described. The gadolinium complexes with n = 0 and 2 show typically weak exchange coupling, whereas the complex bridged by the radical [ind] 3− ligand shows an unusually large coupling constant of J = −11 cm −1 (−2 J formalism). The dysprosium complexes with n = 0 and 1 are single-molecule magnets in zero applied field, whereas the complex with n = 2 does not show slow magnetic relaxation.