Two new Dy3 triangles with trinuclear circular helicates and their single-molecule magnet behavior.

  title={Two new Dy3 triangles with trinuclear circular helicates and their single-molecule magnet behavior.},
  author={Shuang-Yan Lin and Lang Zhao and Yun-Nan Guo and Peng Zhang and Yang Guo and Jinkui Tang},
  journal={Inorganic chemistry},
  volume={51 20},
Self-assembly of polydentate Schiff base 2,6-diformyl-4-methylphenol di(benzoy1hydrazone) (H(3)L), with dysprosium thiocyanate and sodium azide, affords two novel trinuclear triangular circular helicate dysprosium(III) complexes, [Dy(3)(μ(3)-OCH(3))(2)(HL)(3)(SCN)]·4CH(3)OH·2CH(3)CN·2H(2)O (1) or [Dy(3)(μ(3)-N(3))(μ(3)-OH)(H(2)L)(3)(SCN)(3)](SCN)·3CH(3)OH·H(2)O (2), depending on the presence or absence of base. Single-crystal X-ray analyses show that two μ(3)-methoxy oxygens cap the Dy(3… 
Two bulky-decorated triangular dysprosium aggregates conserving vortex-spin structure.
Of particular interest is that those two title Dy(3) compounds maintain the peculiar vortex-spin structure of the ground nonmagnetic doublet, which displays frequency-dependent slow magnetic relaxation, while 3 still inherits the single-molecule-magnet behavior as the parent Dy( 3) prototype.
Tetranuclear and Pentanuclear Compounds of the Rare-Earth Metals: Synthesis and Magnetism.
The Schiff-base proligand 4-tert-butyl-2,6-bis-[(2-hydroxy-phenylimino)methyl]phenol (H3L) was prepared in situ from 4- tert- butyl- 2, 6-diformylphenol and 2-aminophenol, suggesting the presence of weak ferromagnetic interactions and single-molecule magnet behavior under an applied dc field.
Tetranuclear lanthanide (III) complexes containing dimeric subunits: single-molecule magnet behavior for the Dy4 analogue.
Alternating current (ac) susceptibility measurements of complex 1 reveal a frequency- and temperature-dependent two step out-of-phase signals under 1kOe DC field which is characteristic of a single-molecule magnet (SMM) behavior.
Dysprosium-based linear helicate clusters: syntheses, structures, and magnetism
Three new dysprosium-based linear helicate clusters, namely, [Dy4(HL)2L(DMF)8]·2ClO4·CH2Cl2·4DMF·(CH3CH2)2O·H2O (1), [Dy6L3(PhCOO)6(CH3OH)6]·11CH3OH·H2O (2), and
Single-molecule magnetism in three related {Co(III)2Dy(III)2}-acetylacetonate complexes with multiple relaxation mechanisms.
These complexes demonstrate further relaxation modes that are strongly dependent upon the application of a static dc magnetic field and may also be active under a zero applied dc field as derived from the Cole-Cole data.
Two Locally Chiral Dysprosium Compounds with Salen‐Type Ligands That Show Slow Magnetic Relaxation Behavior
Two Dy compounds, [Dy-4(mu(4)-O)L-2(C6H5COO)(6)]center dot 3CH(3)OH (1) and [Dy2L(H2L)(teaH(2))(o-vanillin)(H2O)](ClO4)(2)center dot 2CH(3)OH center dot H2O (2, teaH(3) = triethanolamine), were
Local coordination geometry perturbed β-diketone dysprosium single-ion magnets.
A series of three β-diketone mononuclear dysprosium complexes, namely, Dy(TFI)3(H2O)2 (1), Dy(TFI)3(bpy) (2), and [Dy(TFI)3(Phen)]·0.02CHCl3 (3) (TFI = 2-(2,2,2-trifluoroethyl)-1-indone, bpy =
Chair-Shaped MnII2LnIII4 (Ln = Gd, Tb, Dy, Ho) Heterometallic Complexes Assembled from a Tricompartmental Aminobenzohydrazide Ligand
The reaction of a new compartmental ligand, H3L [H3L = N′-(2-hydroxy-3-methoxybenzylidene)-2-(-2-hydroxy-3-methoxybenzylideneamino)benzohydrazide], with lanthanide salts followed by reaction of MnII
Acetato-bridged dinuclear lanthanide complexes with single molecule magnet behaviour for the Dy2 species.
Comparison of the structural parameters among the similar Dy2 SMMs with a η(1):η(2):μ2 coordination mode of carboxylate groups reveals the significant role played by coordination geometry in modulating the relaxation dynamics of SMMs.


Modulating magnetic dynamics of three Dy2 complexes through keto-enol tautomerism of the o-vanillin picolinoylhydrazone ligand.
The structural differences induced by the different coordinate fashions of the ligand may influence the strength of the local crystal field, the magnetic interactions between metal centers, and the local tensor of anisotropy on each Dy site and their relative orientations, therefore generating dissimilar dynamic magnetic behavior.
A N2(3-) radical-bridged terbium complex exhibiting magnetic hysteresis at 14 K.
The results show how synergizing the strong magnetic anisotropy of terbium(III) with the effective exchange-coupling ability of the N(2)(3-) radical can create the hardest molecular magnet discovered to date.
Observation of slow magnetic relaxation in triple-stranded lanthanide helicates.
Two dinuclear triple-stranded helicates [Ln(2)L(3)](3+) (Ln = Dy and Tb) obtained via self-assembly from the ligand HL (2,6-diformyl-4-methylphenol di(benzoylhydrazone)) and lanthanide perchlorate
Single-molecule magnet behavior for an antiferromagnetically superexchange-coupled dinuclear dysprosium(III) complex.
The Dy(2) complex is an ideal candidate for the elucidation of slow relaxation of the magnetization mechanism seen in lanthanide systems.
Capping ligand perturbed slow magnetic relaxation in dysprosium single-ion magnets.
The similar values of U(eff) for the two magnetically diluted samples imply nearly the same distribution of low-lying states for their Dy(III) centers, which is consistent with the slight axial contraction observed for 1 and 2 and further corroborated by ligand-field analysis.
Series of isostructural planar lanthanide complexes [Ln(III)4(mu3-OH)2(mdeaH)2(piv)8] with single molecule magnet behavior for the Dy4 analogue.
A series of five isostructural tetranuclear lanthanide complexes of formula (mdeaH(2) = N-methyldiethanolamine; piv = pivalate; Ln = Tb (1), Dy (2), Ho (3), Er (4), and Tm (5) have been synthesized and characterized and have a planar "butterfly" Ln(4) core.
[U(Tp(Me2))2(bipy)]+: a cationic uranium(III) complex with single-molecule-magnet behavior.
This compound was isolated as a dark-green solid in good yield and characterized by IR and NMR spectroscopies, and its molecular structure was determined by single-crystal X-ray diffraction.
Coordination-perturbed single-molecule magnet behaviour of mononuclear dysprosium complexes.
The results proved the important influence of the structural environment of a SMM on its magnetic behaviour.
Mononuclear lanthanide single molecule magnets based on the polyoxometalates [Ln(W5O18)2]9- and [Ln(beta2-SiW11O39)2]13- (Ln(III) = Tb, Dy, Ho, Er, Tm, and Yb).
The first two families of polyoxometalate-based single-molecule magnets (SMMs) are reported here and the ligand-field parameters and the splitting of the J ground-state multiplet of the lanthanide ions have been also estimated.
Determination of ligand-field parameters and f-electronic structures of double-decker bis(phthalocyaninato)lanthanide complexes.
Using a multidimensional nonlinear minimization algorithm, a set of ligand-field parameters are determined that reproduces both the NMR and the magnetic susceptibility data of the six complexes simultaneously, and the ratios of the paramagnetic shifts of the two positions were near constant in the six cases.