Two Bulky-Decorated Triangular Dysprosium Aggregates Conserving Vortex-Spin Structure

The self-assembly of dysprosium­(III) with the tailored
chemical
modification of the vanillin group affords two decorated Dy3 compounds, namely, [Dy3(μ3-OH)2­(Hpovh–)3­(NO3)3­(CH3­OH)2­H2O]·NO3·3CH3OH·2H2O (2) and [Dy3­(μ3-OH)2­(H2­vovh–)3­Cl2­(CH3­OH)­(H2O)3]­[Dy3­(μ3-OH)2­(H2­vovh–)3­Cl2­(H2O)4]·Cl4·2CH3­OH·2CH3­CN·7H2O (3), where H2povh = N-(pyridylmethylene)-o-vanilloylhydrazone
and H3vovh = N-vanillidene-o-vanilloylhydrazone. Of particular interest is that those
two title Dy3 compounds maintain the peculiar vortex-spin
structure of the ground nonmagnetic doublet. Complex 2 displays frequency-dependent slow magnetic relaxation, while 3 still inherits the single-molecule-magnet behavior as the
parent Dy3 prototype. The dissimilar dynamic magnetic behavior
originates from the structural differences in light of the coordination
environment of DyIII ions, which influence the local tensor
of anisotropy and crystal-field splitting on each Dy site.