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Magnetic Tuning of an Anionic Co II ‐MOF through Deionization of the Framework: Spin‐Canting, Spin‐Flop, and Easy‐Plane Magnetic Anisotropy
Author(s) -
Tian ChongBin,
Han YunHu,
He ZhangZhen,
Du ShaoWu
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201604809
Subject(s) - spin canting , spin (aerodynamics) , magnetic anisotropy , magnetization , anisotropy , molecule , crystallography , materials science , dimethylamine , crystal structure , chemistry , magnetic structure , condensed matter physics , physics , magnetic field , organic chemistry , quantum mechanics , thermodynamics
An anionic Co II ‐MOF, (Me 2 NH 2 )[Co 3 (Me 2 NH) 3 (OH)(SDBA) 3 ] ( 1 ) (H 2 SDBA=4,4′‐sulfonyldibenzoic acid) consisting of highly symmetric Co II 3 (μ 3 ‐OH) triangles exhibits spin‐canting, spin‐flop, and easy‐plane magnetic anisotropy. Measurement on a single crystal shows that the ab plane of 1 is the easy magnetization plane. After structural modification through simultaneous removal of the coordinated dimethylamine (DMA) molecule at the Co center and the ionic groups DMA + and OH − , the resulting neutral amorphous framework 2 displays an enhanced spin frustration effect. The deionization of 1 does not result in the collapse of the framework, showing the high stability of the backbone structure.