Selective crystallization of dysprosium complex from neodymium/dysprosium mixture enabled by cooperation of coordination and crystallization

Designing a molecular-level Ln3+ separation system remains a challenge for developing next-generation separation methodologies. Herein, we report crystallization-based Nd3+/Dy3+ separation using a tripodal Schiff base ligand. Highly selective crystallization of...

Low-Coordinate Dinuclear Dysprosium(III) Single Molecule Magnets Utilizing LiCl as Bridging Moieties and tris(amido)amine as Blocking Ligands

A low-coordinate dinuclear dysprosium complex {[Dy(N3N)(THF)][LiCl(THF)]}2 (Dy2) with a double bridging ‘LiCl’ moiety and tris(amido)amine (N3N)3- anions as a blocking ligand is synthesized and characterized structurally and magnetically. Thanks to the use of the chelating blocking ligand (N3N)3− equipped with large steric –SiMe3 groups, the coordination sphere of both DyIII ions is restricted to only six donor atoms. The three amido nitrogen atoms determine the orientation of the easy magnetization axes of both DyIII centers. Consequently, Dy2 shows slow magnetic relaxation typical for single molecule magnets (SMMs). However, the effective energy barrier for magnetization reversal determined from the AC magnetic susceptibility measurements is much lower than the separation between the ground and the first excited Kramers doublet based on the CASSCF ab initio calculations. In order to better understand the possible influence of the anticipated intramolecular magnetic interactions in this dinuclear molecule, its GdIII-analog {[Gd(N3N)(THF)][LiCl(THF)]}2 (Gd2) is also synthesized and studied magnetically. Detailed magnetic measurements reveal very weak antiferromagnetic interactions in Gd2. This in turn suggests similar antiferromagnetic interactions in Dy2, which might be responsible for its peculiar SMM behavior and the absence of the magnetic hysteresis loop.

Synthesis and Single-Molecule Magnet Properties of a Trimetallic Dysprosium Metallocene Cation

The dimetallic fulvalene-bridged dysprosium complex [{Dy(Cp*)(μ-BH4)}2(Fvtttt)] (1, Cp* = C5Me5) is converted into the trimetallic borohydride-bridged species [{Dy(Cp*)(Fvtttt)}2Dy(μ-BH4)3] (2). In turn, 2 is reacted with a silylium electrophile to give...

Observation of field-induced single-ion magnet behavior in an octahedral dysprosium complex with strong ligand field

By employing the oxygen-containing ligands with the strong coordination ability, a mononuclear six-coordinate DyIII complex [Dy(Ph3PO)3(OPhCl2NO2)3] (1) (Ph3PO = triphenylphosphine oxide, Cl2NO2PhOH = 2,6-dichloro-4-nitrophenol) with the octahedral DyO6 coordination environment...

Single-component panchromatic white light generation, tuneable excimer-like visible orange and NIR emission in a Dy quinolinolate complex

Panchromatic single-component pure white light generation with a PLQY of ~14.5% is obtained from a dysprosium complex with the 5,7-dichloro-8-quinolinol ligand (HClQ) thanks to a peculiar orange-red excimer-like emission induced...

Modulating the slow magnetic relaxation of a mononuclear Dy(III) single-molecule magnet via magnetic field and dilution effect

A β-diketonate mononuclear dysprosium complex, with the formula [Dy(dpq)(BTFA)3] (1), has been prepared via self-assembly between 3-benzoyl-1,1,1-trifluoroacetone (BTFA) and dipyrido [3,2-d:2’,3’-f] quinoxaline (dpq) ligands. The crystallographic data reveals that the...

Lanthanide complexes based on a conjugated pyridine carboxylate ligand: structures, luminescence and magnetic properties

The structures, fluorescence and magnetic properties of series three lanthanide complexes have been investigated. Dysprosium complex exhibit the single-molecule behavior.