Journal article

Effects of Mixed Valency in an Fe-Based Framework: Coexistence of Slow Magnetic Relaxation, Semiconductivity, and Redox Activity

Ryuichi Murase, Christopher J Commons, Timothy A Hudson, Guy NL Jameson, Chris D Ling, Keith S Murray, Wasinee Phonsri, Richard Robson, Qingbo Xia, Brendan F Abrahams, Deanna M D'Alessandro

INORGANIC CHEMISTRY | AMER CHEMICAL SOC | Published : 2020

Abstract

A 2-D coordination framework, (NEt4)2[Fe2(fan)3] (1·5(acetone); H2fan = 3,6-difluoro-2,5-dihydroxy-1,4-benzoquinone), was synthesized and structurally characterized. The compound is structurally analogous to a formerly elucidated framework, (NEt4)2[Fe2(can)3] (H2can = 3,6-dichloro-2,5-dihydroxy-1,4-benzoquinone), and adopts a 2-D (6,3) topology with the symmetrical stacking of [Fe2(fan)3]2- sheets that are held in position by the NEt4+ cations between the sheets. The investigation of the dc and ac magnetic properties of 1·5(acetone) revealed ferromagnetic ordering behavior and slow magnetization relaxation, as evinced from ac susceptibility measurements. Furthermore, the exposure of 1·5(acet..

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Grants

Funding Acknowledgements

We gratefully acknowledge the Australian Research Council and the Vibrational Spectroscopy Core Facility at the University of Sydney for supporting this research. We thank Dr. Ivana Borilovic and Dr. Kuduva R. Vignesh for help with the program CC-FIT and the relaxation analysis.