Magnetic Poles Determinations and Robustness of Memory Effect upon Solubilization in a DyIII-Based Single Ion Magnet

Single molecule magnet behaviour in a rare trinuclear {CrIIIDyIII2} methoxo-bridged complex

A new neutral hetero-trinuclear {Cr^III–DyIII2} coordination complex exhibiting single molecule magnet behaviour has been synthesized.

Determination of magnetic anisotropy in a multinuclear TbIII-based single-molecule magnet

The magnetic anisotropy axis of the Tb³⁺ ion in a tetranuclear [CuTb]₂ SMM was established by magneto-structural relationship investigation.

Chiral probe development for circularly polarised luminescence: comparative study of structural factors determining the degree of induced CPL with four heptacoordinate europium(iii) complexes

Induced CPL signatures arising from the reversible binding of chiral carboxylates allow their absolute configuration and enantiomeric purity to be assessed.

Single-ion 4f element magnetism: an ab-initio look at Ln(COT)2−

The orbital and spin magnetizations of the ground state of the Ln(COT)₂⁻ series are investigated at the ab-initio level.

Planar Dy3 + Dy3 clusters: design, structure and axial ligand perturbed magnetic dynamics

Coupling Dy₃ triangles results in two unique Dy₆ complexes showing single-molecule magnetic behaviour with high energy barriers of 116 and 181 K for Dy₆–NO₃ and Dy₆–SCN, respectively.

Prediction of the quantized axis of rare-earth ions: the electrostatic model with displaced point charges

An electrostatic model with displaced point charges to predict the quantized axis of rare-earth ions is proposed.

Analysis of the electrostatics in DyIII single-molecule magnets: the case study of Dy(Murex)3

A Dy^III-based single-molecule magnet is reported. Ab initio calculations highlight that molecular symmetry plays a predominant role over site symmetry in determining the shape and orientation of Dy^III magnetic anisotropy.

Two mononuclear single molecule magnets derived from dysprosium(iii) and tmphen (tmphen = 3,4,7,8-tetramethyl-1,10-phenanthroline)

Two mononuclear Dy(iii) complexes have been synthesized and structurally characterized. Magnetic properties indicate both complexes exhibit SMM behavior and complex 1 is a SMM displaying D_2d geometry.

Near-IR luminescence and field-induced single molecule magnet of four salen-type ytterbium complexes

A series of rigid hexadentate salen-type (H2L) ytterbium complexes, namely, [Yb2L3(CH3OH)]·3CH3CN (1), [Yb2LL'L″(CH3OH)(H2O)2](ClO4)2·CH3OH·H2O (2), [Yb2L(OAc)4(CH3OH)2]·2CH3OH (3), and {[Yb2L(OAc)4]·3H2O}n (4) (H2L = N,N'-bis(2-oxy-3-methoxybenzylidene)-1,2-phenylenediamine, HL' = 2-(2'-hydroxy-3'-methyloxy-phenyl)benzimidazole and HL" = 3-methoxysalicylaldehyde) have been synthesized by reactions of H2L with multifarious Yb(3+) salts. X-ray crystallographic analyses demonstrate that complex 1 is of a triple-decker sandwich-type Yb2L3 structure with a ratio of H2L/Yb = 3:2, 2 and 3 possess the unique Yb2 core with a ratio of H2L/Yb = 2:2 and 1:2, respectively, 4 exhibits one dimensional coordination polymers in which the polymeric structures are formed by acetate (OAc(-)) groups. All complexes 1-4 exhibit near-IR luminescence, which can be rationalized on the basis of the disparate structural effects. The magnetic analysis unveils that all complexes 1-4 are of field-induced single-molecule magnet behavior with the energy barriers (Ueff/kB) of 14.5, 2.0, 9.5, and 2.4 K at 3 kOe direct current fields, respectively.

Influence of the supramolecular architecture on the magnetic properties of a Dy(III) single-molecule magnet: an ab initio investigation

Single-crystal angular-resolved magnetometry and wavefunction-based calculations have been used to reconsider the magnetic properties of a recently reported Dy(III)-based single-molecule magnet, namely [Dy(hfac)3(L(1))] with hfac(-) = 1,1,1,5,5,5-hexafluoroacetylacetonate and L(1) = 2-(4,5-bis(propylthio)-1,3-dithiol-2-ylidene)-6-(pyridin-2-yl)-5H-[1,3]dithiolo[4',5':4,5]benzo[1,2-d]imidazole. The magnetic susceptibility and magnetization at low temperature are found to be strongly influenced by supramolecular interactions. Moreover, taking into account the hydrogen-bond networks in the calculations allows to explain the orientation of the magnetic axes. This strongly suggests that hydrogen bonds play an important role in the modulation of the electrostatic environment around the Dy(III) center that governs the nature of its magnetic ground-state and the orientation of its anisotropy axes. We thus show here that SMM properties that rely on supramolecular organization may not be transferable into single-molecule devices.

[Dy(acac)3(dppn)]·C2H5OH: construction of a single-ion magnet based on the square-antiprism dysprosium(iii) ion

The present work reports a new mononuclear Dy(iii) complex [Dy(acac)₃(dppn)]·C₂H₅OH (1) (acac = acetylacetone, dppn = benzo[i]dipyrido-[3, 2-a:2′,3′-c]phenazine).