Nickel(II)-Lanthanide(III) Magnetic Exchange Coupling Influencing Single-Molecule Magnetic Features in {Ni(2)Ln(2)} Complexes

作者：Ahmed Naushad; Das Chinmoy; Vaidya Shefali; Langley Stuart K; Murray Keith S; Shanmugam Maheswaran^*

来源：Chemistry - A European Journal, 2014, 20(44): 14235-14239.

DOI：10.1002/chem.201404393

• dysprosium
• magnetism
• nickel
• single-molecule magnet
• X-ray diffraction

Four isostructural [Ni(2)Ln(2)(CH3CO2)(3)(HL)(4)(H2O)(2)](3+)(Ln(3+)=Dy (1), Tb (2), Ho (3) or Lu (4)) complexes and a dinuclear [NiGd(HL)(2)(NO3)(3)] (5) complex are reported (where HL=2-methoxy-6-[(E)-2-hydroxymethyl-phenyliminomethyl]-phenolate). For compounds 1-3 and 5, the Ni2+ ions are ferromagnetically coupled to the respective lanthanide ions. The ferromagnetic coupling in 1 suppresses the quantum tunnelling of magnetisation (QTM), resulting in a rare zero dc field Ni-Dy single-molecule magnet, with an anisotropy barrier U-eff of 19K.

• 出版日期2014-10-27