A new "offset" analogue of the classical oxime-bridged [Mn(III)6] single-molecule magnets

Katye M Poole; Maria Korabik; Muhandis Shiddiq; Kylie J Mitchell; Adeline Fournet; Zhiliang You; George Christou; Stephen Hill; Małgorzata Hołyńska

doi:10.1021/ic502787q

A new "offset" analogue of the classical oxime-bridged [Mn(III)6] single-molecule magnets

Inorg Chem. 2015 Feb 16;54(4):1883-9. doi: 10.1021/ic502787q. Epub 2015 Jan 26.

Authors

Katye M Poole¹, Maria Korabik, Muhandis Shiddiq, Kylie J Mitchell, Adeline Fournet, Zhiliang You, George Christou, Stephen Hill, Małgorzata Hołyńska

Affiliation

¹ Department of Chemistry, University of Florida , Gainesville, Florida 32611-7200, United States.

PMID: 25621530
DOI: 10.1021/ic502787q

Abstract

A new "offset" analogue of the classical [Mn6O2]-core oxime-bridged single-molecule magnets is introduced with a modified stacking arrangement of the [Mn3O] units. Studies of the magnetic properties reveal antiferromagnetic exchange interactions, a spin S = 4 ground state and population of low-lying excited states. Slow relaxation of the magnetization can be detected, with a corresponding energy barrier of 35.8 K. Interpretation of these features is supported with high-frequency EPR studies, quantifying the easy-axis type magnetic anisotropy, leading to a biaxial system. Redox properties investigated by cyclic and differential pulse voltammetry reveal multiple irreversible redox processes.