Modulating the single-molecule magnet behaviour in phenoxo-O bridged Dy2 systems via subtle structural variations

作者：Wang, Wen-Min; Zhao, Xiao-Yu; Qiao, Hui; Bai, Li; Han, Hong-Fei; Fang, Ming^*; Wu, Zhi-Lei; Zou, Ji-Yong

来源：Journal of Solid State Chemistry, 2017, 253: 154-160.

DOI：10.1016/j.jssc.2017.05.038

• Dinuclear dysprosium complexes
• Rationally modulate
• Single-molecule magnet behaviour

In search of simple approaches to rationally modulate the single-molecule magnet behaviour in polynuclear lanthanide compound, a new system containing two structurally closely related dinuclear dysprosium complexes, namely [Dy-2(hfac)(4)L-2] (1) and [Dy-2(hfac)(4)L'(2)] (2) (hfac = hexafluoroacetylacetonate, HL = 2-[4-methylaniline-imino]methyl]-8-hydroxyquinoline and HL' = 2-[(3,4-dimethylaniline)-imino]methyl]-8-hydroxyquinoline), are successfully synthesized and the structure-dependent magnetic properties are investigated. The two Dy2 compounds display only slight variations in the coordination geometries of the center Dy(III) ion but display remarkably different single-molecule magnet behaviors with the anisotropic barriers (Delta E/k(B)) of 9.91 K for 1 and 20.57 K for 2. The different magnetic relaxation behaviors of the two Dy2 complexes mainly originate from the different chemical environments of the central Dy-III ions.

• 出版日期2017-9
• 单位河北大学; 太原师范学院; 南开大学; 江西省科学院; 中国科学院长春应用化学研究所; 河北科技师范学院