Comparison of two field-induced ErIII single ion magnets. Issue 41 (12th September 2019)

• Record Type: Journal Article
• Authors: Kühne, Irina A.; Ungur, Liviu; Esien, Kane; Carter, Anthony B.; Gordon, John D.; Pauly, Cameron; Müller-Bunz, Helge; Felton, Solveig; Zerulla, Dominic; Morgan, Grace G.
• Is Part Of: Dalton transactions. Volume 48:Issue 41(2019)
• Page Start: 15679
• Page End: 15686
• Publication Date: 2019-09-12
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c9dt02434d
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Herein we present the synthesis, and magnetic and photophysical properties of four mononuclear Ln III complexes, among which the two Er III complexes 2 and 4 exhibit field-induced SIM behaviour that provides a new route towards air-stable erbium SIMs. Abstract : We present the synthesis, magnetic and photophysical properties of four mononuclear Ln III complexes in two isostructural lattices containing Gd III and Er III . A heptadentate Schiff base ligand and acetate versus trifluoroacetate were used to synthesise complexes 1–4, among which the two Er III complexes 2 and 4 exhibit field-induced SIM behaviour with almost similar U eff values (31.6 K for 2 and 32.7 K for 4 ). Ab initio calculations show the structure of the low-lying energy states and highlight that there is already significant tunnelling in the ground doublet state, but the application of a weak magnetic field of 0.05 T is sufficient for ac magnetic measurements to suppress tunnelling in the ground state. The calculated main magnetic axes ( g Z ) of the ground Kramers doublets show small differences between the two Er III compounds 2 and 4 due to their different ligand fields.