A Dy4 single-molecule magnet and its Gd(iii), Tb(iii), Ho(iii), and Er(iii) analogues encapsulated by an 8-hydroxyquinoline Schiff base derivative and β-diketonate coligand.
Five new tetranuclear complexes based on an 8-hydroxyquinoline Schiff base derivative and the β-diketone coligand, [Ln4(acac)4L6(μ3-OH)2]·CH3CN·0.5CH2Cl2(Ln = Gd (1), Tb (2), Dy (3), Ho (4) and Er (5); HL = 5-(benzylidene)amino-8-hydroxyquinoline; acac = acetylacetonate) have been synthesized, and structurally and magnetically characterized. Complexes 1-5 have similar tetranuclear structures. Each LnIIIion is eight coordinated and its coordination polyhedra can be described as being in a distorted square-antiprismatic geometry. The magnetic studies reveal that 1 features the magnetocaloric effect (MCE) with the magnetic entropy change of -ΔSm(T) = 25.08 J kg-1K-1at 2 K for ΔH = 7 T, and 3 displays the slow magnetic relaxation behavior of Single Molecule Magnets (SMMs) with the anisotropic barrier of 86.20 K and the pre-exponential factor τ0= 2.99 × 10-8s.
Department of Chemistry, Tianjin University, Tianjin, 300072, China. cuijianzhong@tju.edu.cn ghl@tju.edu.cn and Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071, China.
Hong-Ling
HL
Gao
Department of Chemistry, Tianjin University, Tianjin, 300072, China. cuijianzhong@tju.edu.cn ghl@tju.edu.cn.
Xiao-Pu
XP
Zhou
Department of Chemistry, Tianjin University, Tianjin, 300072, China. cuijianzhong@tju.edu.cn ghl@tju.edu.cn.
Yan-Xia
YX
Bi
Department of Chemistry, Tianjin University, Tianjin, 300072, China. cuijianzhong@tju.edu.cn ghl@tju.edu.cn.
Hai-Yun
HY
Shen
Department of Chemistry, Tianjin University, Tianjin, 300072, China. cuijianzhong@tju.edu.cn ghl@tju.edu.cn.
Wen-Min
WM
Wang
Department of Chemistry, Tianjin University, Tianjin, 300072, China. cuijianzhong@tju.edu.cn ghl@tju.edu.cn.
Ni-Ni
NN
Wang
Department of Chemistry, Tianjin University, Tianjin, 300072, China. cuijianzhong@tju.edu.cn ghl@tju.edu.cn.
Yi-Xin
YX
Chang
Department of Chemistry, Tianjin University, Tianjin, 300072, China. cuijianzhong@tju.edu.cn ghl@tju.edu.cn.
Ru-Xia
RX
Zhang
Department of Chemistry, Tianjin University, Tianjin, 300072, China. cuijianzhong@tju.edu.cn ghl@tju.edu.cn and Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071, China.
Jian-Zhong
http://orcid.org/0000-0002-5336-4284
JZ
Cui