Journal
NEW JOURNAL OF CHEMISTRY
Volume 42, Issue 18, Pages 14949-14955Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8nj02479k
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [21473121, 21571138]
- Project of Shandong Province Higher Educational Science and Technology Program [J16LC11]
- Natural Science Foundation of Shandong Province [ZR2016BP06]
- Fund for Shanxi 1331 Project Key Innovative Research Team
- 111 Project [B12015]
Ask authors/readers for more resources
Three new Ln(4) clusters based on a bidentate Schiff base ligand having formulae [Ln(4)((3)-OH)(2)L-6(acac)(4)]xCH(3)CN (Ln(iii) = Eu(1), Gd(2) and Dy(3), x = 1 for 1, x = 2 for 2, and x = 0 for 3, HL = 5-(4-o-hydroxybenzylidene)-8-hydroxylquinoline and acac = acetylacetone) have been successfully synthesized and completely characterized. The structures of 1-3 are similar to each other except for the nature of the central ion and the number of free acetonitrile molecules. The four Ln(III) ions are coplanar and clusters 1-3 have a butterfly-shaped arrangement. Magnetic studies show that cluster 2 displays a weak antiferromagnetic exchange interaction between nearby Gd-III centers and exhibits magnetic refrigeration with maximum -S-m = 18.85 J kg(-1) K-1 (H = 7.0 T at 2.5 K). Alternating current (ac) magnetic susceptibility measurement of 3 indicates that 3 demonstrates SMMs behavior under a zero direct-current (dc) field, with an effective energy barrier (E/k(B)) of 79.15 K and a pre-exponential factor (0) = 5.82 x 10(-8) s.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available