Single-chain magnet behavior in a finite linear hexanuclear molecule

Abstract

The careful monitoring of crystallization conditions of a mixture made of a TbIII building block and a substituted nitronyl nitroxide that typically provides infinite coordination polymers (chains), affords a remarkably...

Metallogels: a novel approach for the nanostructuration of single-chain magnets

“…This color change, already reported for similar crystalline systems, is characteristic of the NIT-4f coordination. 25,49,50 The purity of the precursor is confirmed by elemental analysis and FT-IR (absence of ν (–OH) stretching band, Fig. S3, ESI†).…”

Lanthanide–radical single-molecule magnets: current status and future challenges

“…42 Pioneering SCM systems such as [Co(hfac) 2 (NITPhOMe)] 42 b and [Dy(hfac) 3 (NIT-C 6 H 4 OPh)] ∞ 42 e , f reported by R. Sessoli and D. Gatteschi et al have been set as archetypes for magnetism investigation and pave the way for the study of follow-up nitroxide radical–Ln SMMs. 43–56 Different from the nitrogen-based Rad–Ln SMMs which often contain the [Dy(Cp) 2 ] + fragment, chemists favor the neutral [Dy(hfac) 3 ] motif to design nitronyl nitroxide-based 4f SMMs. The text-book example of 2p–4f-SMM [Dy(hfac) 3 (NITpPy)] 2 ( 22 ) was first reported by G. Poneti et al in 2007.…”

Light actuated single-chain magnet with magnetic coercivity

“…[11][12][13][14] Glauber predicted the slow magnetic relaxation in an anisotropic Ising system in 1963, but it was not until 2001 that the first experimental evidence of single-chain magnets was reported by Caneschi et al 15,16 Since then, many efforts have been devoted to synthesizing new single-chain magnets that can exhibit higher spin reversal energy barriers and blocking temperatures. [17][18][19][20] The recent breakthrough has been achieved in two cobalt-radical chain compounds reported by Shi and co-workers, Co(hfac) 2 (R-NapNIT) (hfac = hexafluoroacetylacetonate, R-NapNIT = 2-(2′-(R-)naphthyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide, R = MeO or EtO), which showed an ultra-large coercive field above 6 T. 21 Besides pursuing the high-performance single-chain magnets, the switching manipulation of their dynamic relaxation properties has also attracted considerable attention because it provides an alternative in reading and writing information at the molecular level. Several stimuli-responsive units, such as photochromic components and reversible coordinated molecules, have been utilized to modify the local coordination sphere of spin carriers to tune the magnetic relaxation behaviors.…”