A 24-Gd nanocapsule with a large magnetocaloric effect

Abstract

Two 24-nuclear lanthanide clusters, and were obtained and structurally characterized. Magnetic investigations reveal that exhibits the largest entropy change (-ΔS(m)) of 46.12 J kg(-1) K(-1) for ΔH = 7 T in all reported molecular clusters, and single-molecule magnet behaviour is observed in .

Gadolinium(III)‐Hydroxy Ladders Trapped in Succinate Frameworks with Optimized Magnetocaloric Effect

“…The magnetocaloric effect (MCE) that dictates the capacity of the refrigerants is determined by the isothermal magnetic entropy change (Δ S m ) and the adiabatic temperature change (Δ T ad ) induced by the change of the external field 4. 5 Since the first study of the MCE in the famous molecule {Mn 12 },6 large amount of molecular clusters and coordination polymers were excavated, including {Fe 14 },7 {Mn 10 },8 {Mn 4 Gd 4 },9 {Co x Gd y },10 {Cu 5 Gd 4 },11 {Ni 6 Gd 6 },12 {Gd 2 },13 {Gd 4 Ni 8 },14 {Mn x Gd y },15 {Gd 24 },16 [Gd(OAc) 3 (H 2 O) 0.5 ] n (Ac=acyl),17 [Gd(HCOO)(OAc) 2 (H 2 O) 2 ] n ,18 [Gd(HCOO)(C 8 H 4 O 4 )] n ,19 and [Mn(H 2 O) 6 ] n [MnGd(C 4 H 4 O 5 ) 3 ] 2 n ⋅ 6 n H 2 O 20…”

Magnetic Properties of 3D Heptanuclear Lanthanide Frameworks Supported by Mixed Ligands

“…4 As a result, a lot of pure lanthanide clusters, such as Ln 3 −Ln 10 , 5 Ln 12 −Ln 15 , 6 Ln 20 , 7 Ln 22 , 8 Ln 24 , 9 Ln 36 , 10 Ln 38 11 Ln 48 , 11,12 Ln 60 , 13 and Ln 104 , 14 have been documented. Recently, Yaghi et al proposed that metal cluster units may self-assemble into coordination polymers, 15 which will bring about the particular characteristics of the clusters into the obtained frameworks.…”

Facile Self‐Assembly of Intermetallic [Ni2Gd2] Cubane Aggregate for Magnetic Refrigeration

“…The most desirable attribute of these materials is their large ground spin states4 with an associated high Δ S m , which is a key parameter that determines the MCE of a magnetic system. Many of these complexes showing promising MCE properties are usually obtained from solvothermal methods under harsh conditions, such as [Ni 6 Gd 6 P 6 ],4a [Gd 24 ],4e [Co 8 Gd 8 ],4b [Co 6 Gd 8 ],4d etc 2. 4c, 5, or slow evaporation of reaction mixtures over a prolonged period, such as [Ln 42 M 10 ],4h [Mn 4 Ln 4 ],6 [Gd(HCOO)(OAc) 2 (H 2 O) 2 ],7 etc 4f.…”