A rhombus-shaped tetranuclear dysprosium cluster showing single-molecule magnet behavior

• DOI: 10.1016/j.poly.2017.08.033
• Publication Date: 2017-09-01T21:00:18Z
• Authors: Xiao-Xiao Wang; Xue-Rong Han; Xu Si; Meng Fang; Wen-Min Wang; Hao-Kai Peng; Ming Fang
• Keywords: Dysprosium; Rhombus; Magnetic Relaxation; Trigonal crystal system; Single-molecule magnet; Coordination sphere

Abstract A new rhombus-shaped tetranuclear dysprosium cluster, [Dy 4 (μ 3 -OH) 2 L 6 (tmhd) 4 ]·CH 2 Cl 2 ·8CH 3 CN ( 1 ) (HL = 5-(4-fluorobenzylidene)-8-hydroxylquinoline; tmhd = 2,2,6,6-tetramethyl-3,5-heptanedione), has been synthesized and completely characterized. The X-ray structural analysis exhibit that compound 1 contains one Dy 4 center with rhombus-shaped arrangement, and each Dy(III) ion of 1 is located in a distorted bicapped trigonal prism coordination sphere. Magnetic properties measurements indicate that 1 shows slow magnetic relaxation with energy barrier of 69.29 K and τ 0 = 6.18 × 10 −8 s.