Magnetic materials based on heterometallic Cr^II/III–Ln^III complexes

Abstract

Accommodating disparate spin centres within a single ensemble is a valuable synthetic strategy to obtain interesting molecular magnetic materials. 3d−4f heterometallic complexes are one such subclass that is being extensively...

Self-Assembly of Lanthanide–Aluminum Cluster-Organic Frameworks with Magnetocaloric Effect and Luminescence

“…However, the deviation between the two magnetic entropy changes could be attributed to the presence of antiferromagnetic interaction between Gd III ions and Al III ions, as well. Accordingly, the Gd 6 Al cluster demonstrates its potential for practical applications as a magnetic cooling system. − …”

Alkoxy-Bridged Dicopper(II) Cores Meet Tetracyanonickelate Linkers: Structural, Magnetic, and Theoretical Investigation of Cu/Ni Coordination Polymers

“…Heterometallic coordination polymers (CPs) incorporating magnetically active building blocks have gained increased attention in recent years because of possible cooperative phenomena of the magnetic spins. − The strongest magnetic coupling between the spins of the nearest-neighbor paramagnetic centers is typically mediated by short bridging ligands, including oxo, cyano, azido, or carboxylate moieties, which have extensively been studied due to their ability to transmit magnetic exchange of different nature and magnitude. − Considering the dependence of the magnetic interactions on the type of metal ion and the superexchange path, the selection of transition metals and bridging groups emerges as a key feature in the construction of heterometallic coordination systems. , …”

Effect of diamagnetic Zn(ii) ions on the SMM properties of a series of trinuclear ZnDy2 and tetranuclear Zn2Dy2 (LnIII = Dy, Tb, Gd) complexes: combined experimental and theoretical studies

“…22–27 Among several methodical techniques tried to suppress QTM, one is merging of 3d–4f spin carriers. 13,28–41 However, some researchers have observed very weak magnetic coupling between paramagnetic 3d and 4f ions which shows a small separation between the low-lying split sublevels leading to a lower energy barrier for magnetization reversal. 35–38 Keeping this in mind, replacing paramagnetic transition metal M 2+ ions with diamagnetic Zn II ions would be a good approach for enhancing the energy barrier and this method is employed with relative success by many researchers as it diminishes the intermolecular magnetic interaction responsible for swift tunneling of magnetization.…”