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Journal Articles Chemical Science Year : 2021

Single-chain magnet behavior in a finite linear hexanuclear molecule

Felix Houard
Yan Suffren
Olivier Guillou
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Abstract

The careful monitoring of crystallization conditions of a mixture made of a Tb building block and a substituted nitronyl-nitroxide that typically provides infinite coordination polymers (), affords a remarkably stable linear hexanuclear molecule made of six Tb ions and five NIT radicals. The are double-bridged by water molecules but calculations demonstrate that this bridge is inefficient in mediating any magnetic interaction other than a small dipolar antiferromagnetic coupling. Surprisingly the , despite being finite molecules, show a single-chain magnet (SCM) behavior. This results in a magnetic hysteresis at low temperature whose coercive field is almost doubled when compared to the . We thus demonstrate that finite linear molecules can display SCM magnetic relaxation, which is a strong asset for molecular data storage purposes because 1D magnetic relaxation is more robust than the relaxation mechanisms observed in single-molecule magnets (SMMs) where under-barrier magnetic relaxation can operate.
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hal-03331002 , version 1 (01-09-2021)

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Felix Houard, Frédéric Gendron, Yan Suffren, Thierry Guizouarn, Vincent Dorcet, et al.. Single-chain magnet behavior in a finite linear hexanuclear molecule. Chemical Science, 2021, 12 (31), pp.10613-10621. ⟨10.1039/d1sc02033a⟩. ⟨hal-03331002⟩
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