Auxiliary ligand-triggered assembly of two dinuclear Cu(II) compounds with a pyridylhydrazone derivative: Synthesis, crystal structure and magnetic property

Liu, Xiangyu; Liu, Huaixian; Cen, Peipei; Chen, Xiaoyan; Zhang, Huiliang; Song, Wenhui; Hu, Qilin

doi:10.1016/j.ica.2016.03.031

Cited by 26 publications

(1 citation statement)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since the single-molecule magnet (SMM) was first discovered in 1993, such magnetic matter featuring slow relaxation behavior has been a burgeoning point and explored unremittingly by physical, chemical, and materials scholars . Significant easy-axis anisotropy and spin ground state are recognized as two chief components to attain the SMMs with prominent blocking temperature and anisotropic barrier, which acts as key roles in the potential applications of SMMs, including quantum computers, molecular spintronics apparatus, and high-density data memories . With plentiful SMMs being designed and prepared, lanthanide ions are encouraged to serve as the highly promising option for SMMs assembly because of their inherent strong spin–orbital coupling effect and significant magnetic anisotropies .…”

Section: Introductionmentioning

confidence: 99%

Electrostatic Potential Determined Magnetic Dynamics Observed in Two Mononuclear β-Diketone Dysprosium(III) Single-Molecule Magnets

et al. 2017

View full text Add to dashboard Cite

Two β-diketone mononuclear Dy(III) compounds, formulated as Dy(BTFA)(HO) (1) and Dy(BTFA)(bpy) (2) (BTFA = 3-benzoyl-1,1,1-trifluoroacetone, bpy = 2,2'-bipyridine), were prepared. Compound 1 can be identified to transform to 2 in the attendance of bpy coligand, when the local geometry symmetry of eight-coordinated Dy(III) ion changes from a dodecahedron (D) in 1 to a square antiprism (D) in 2. Fine-tuning structure aroused by auxiliary ligand has dramatical impact on magnetic properties of compounds 1 and 2. Magnetic investigations demonstrate that both 1 and 2 display dynamic magnetic relaxation of single-molecule magnets (SMMs) behavior with different effective barriers (ΔE/k) of 93.09 K for 1 under zero direct-current (DC) field as well as 296.50 K for 1 and 151.01 K for 2 under 1200 Oe DC field, respectively. As noticed, compound 1 possesses higher effective barrier than 2, despite 1 exhibiting a lower geometrical symmetry of the Dy(III) ion. Ab initio studies reveal that the Kramers doublet ground state is predominantly axial with the g tensors of two compounds matching the Ising-limit factor of 20 anticipated for the pure M = ±15/2 state. Electrostatic analysis confirms the uniaxial anisotropy directions, highlighting that the proper electrostatic distribution of the coordination sphere around Ln(III) center is the critical factor to improve the magnetic anisotropy and determine the dynamic behaviors of SMMs.

show abstract

Section: Introductionmentioning

confidence: 99%