Importance of Axial Symmetry in Elucidating Lanthanide-Transition Metal Interactions

Niels A. Bonde, Jonatan B. Petersen, Mikkel A. Sørensen, Ulla G. Nielsen, Björn Fåk, Stéphane Rols, Jacques Ollivier, Høgni Weihe, Jesper Bendix*, Mauro Perfetti

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Abstrakt

In this paper, we experimentally study and model the electron donating character of an axial diamagnetic Pd2+ ion in four metalloligated lanthanide complexes of formula [PPh4][Ln{Pd(SAc)4}2] (SAc- = thioacetate, Ln = Tb, Dy, Ho, and Er). A global model encompassing inelastic neutron scattering, torque magnetometry, and dc magnetometry allows to precisely determine the energy level structure of the complexes. Solid state nuclear magnetic resonance reveals a less donating character of Pd2+ compared to the previously reported isostructural Pt2+-based complexes. Consequently, all complexes invariably show a lower crystal field strength compared to their Pt2+-analogues. The dynamic properties show an enhanced single molecule magnet behavior due to the suppression of quantum tunneling, in agreement with our model.

OriginalsprogEngelsk
TidsskriftInorganic Chemistry
Vol/bind59
Udgave nummer1
Sider (fra-til)235-243
ISSN0020-1669
DOI
StatusUdgivet - 6. jan. 2020

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