chem.202001235.pdf (897.65 kB)
Download file

Probing Relaxation Dynamics in Five-Coordinate Dysprosium Single-Molecule Magnets

Download (897.65 kB)
journal contribution
posted on 13.05.2021, 08:44 by Vijay S Parmar, Fabrizio Ortu, Xiaozhou Ma, Nicholas F Chilton, Rodolphe Clerac, David P Mills, Richard EP Winpenny
A new family of five-coordinate lanthanide single-molecule magnets (Ln SMMs) [Dy(Mes*O)2(THF)2X] (Mes*=2,4,6-tri-tert-butylphenyl; X=Cl, 1; Br, 2; I, 3) is reported with energy barriers to magnetic reversal >1200 K. The five-coordinate DyIII ions have distorted square pyramidal geometries, with halide anions on the apex, and two Mes*O ligands mutually trans- to each other, and the two THF molecules forming the second trans- pair. These geometrical features lead to a large magnetic anisotropy in these complexes along the trans-Mes*O direction. QTM and Raman relaxation times are enhanced by varying the apex halide from Cl to Br to I, or by dilution in a diamagnetic yttrium analogue.

Funding

Engineering and Physical Sciences Research Council. Grant Numbers: EP/P002560/1, EP/R011079/1, EP/P001386/1 European Research Council. Grant Number: ERC-2017-ADG-786734 Chinese Government Scholarship. Grant Number: PhD studentship

History

Citation

V. S. Parmar, F. Ortu, X. Ma, N. F. Chilton, R. Clérac, D. P. Mills, R. E. P. Winpenny, Chem. Eur. J. 2020, 26, 7774.

Version

VoR (Version of Record)

Published in

Chemistry: A European Journal

Volume

26

Issue

35

Pagination

7774 - 7778

Publisher

Wiley

issn

0947-6539

eissn

1521-3765

Acceptance date

26/03/2020

Copyright date

2020

Available date

13/05/2021

Spatial coverage

Germany

Language

English