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Rotaxane Co II Complexes as Field‐Induced Single‐Ion Magnets
Author(s) -
Cirulli Martina,
Salvadori Enrico,
Zhang ZhiHui,
Dommett Michael,
Tuna Floriana,
Bamberger Heiko,
Lewis James E. M.,
Kaur Amanpreet,
Tizzard Graham J.,
Slageren Joris,
CrespoOtero Rachel,
Goldup Stephen M.,
Roessler Maxie M.
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202103596
Subject(s) - rotaxane , magnet , electron paramagnetic resonance , context (archaeology) , ion , chemistry , metal , chelation , magnetization , crystallography , chemical physics , nanotechnology , materials science , magnetic field , nuclear magnetic resonance , physics , inorganic chemistry , supramolecular chemistry , organic chemistry , crystal structure , paleontology , quantum mechanics , biology
Abstract Mechanically chelating ligands have untapped potential for the engineering of metal ion properties. Here we demonstrate this principle in the context of Co II ‐based single‐ion magnets. Using multi‐frequency EPR, susceptibility and magnetization measurements we found that these complexes show some of the highest zero field splittings reported for five‐coordinate Co II complexes to date. The predictable coordination behaviour of the interlocked ligands allowed the magnetic properties of their Co II complexes to be evaluated computationally a priori and our combined experimental and theoretical approach enabled us to rationalize the observed trends. The predictable magnetic behaviour of the rotaxane Co II complexes demonstrates that interlocked ligands offer a new strategy to design metal complexes with interesting functionality.