Construction of a High Nuclear Gadolinium Cluster with Enhanced Magnetocaloric Effect through Structural Transition.
ACS Omega
; 7(43): 38782-38788, 2022 Nov 01.
Article
em En
| MEDLINE
| ID: mdl-36340128
ABSTRACT
Starting from a dinuclear complex {Gd2(L)2(NO3)4(H2O)2}·2(CH3CN) (1) based on 2,6-dimethoxyphenol (HL), a nonanuclear cluster {Gd9(L)4(µ4-OH)2(µ3-OH)8(µ2-OCH3)4(NO3)8 (H2O)8}(OH)·2H2O (2) was obtained via modulating the amount of the ligand and base. Both of them have been structurally and magnetically characterized. Complex 1 decorates the Gd2 core bridged by double µ2-phenoxyl oxygen atoms and coordinated neutral CH3CN molecules, while 2 features the Gd9 core with a sandglass-like topology. Magnetic investigations reveal that the weaker antiferromagnetic interactions between adjacent metal ions exist in complex 2 than in 1, which is in agreement with the theoretical results. Meanwhile, the magnetocaloric effect with a maximum -ΔS m value changes from 27.32 to 40.60 J kg-1 K-1 at 2 K and 7 T.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
ACS Omega
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
China