A well-defined two-step relaxation, described by the sum of two modified Debye functions, is observed in a new alkoxido-bridged linear tetranuclear DyIII aggregate showing single-molecule magnet behavior with remarkably large energy barrier. This compound represents model molecular clear relaxation evidenced frequency-dependent susceptibility, which therefore may stimulate further investigations regarding dynamics lanthanide-based systems.

Single-ion magnets 1 and 2 their diamagnetic analogues 3 4 for magnetic-site dilution were obtained through substitution of the coordinated water molecules [Ln(TTA)(3)(H(2)O)(2)] (Ln=Dy (1, 2), Y (3, 4); TTA=4,4,4-trifluoro-1-(2-thienyl)-1,3-butanedionate) by 2,2'-bipyridine 3) 1,10-phenanthroline (2, 4) capping ligands. Their structures magnetic properties investigated with goal identifying features relevant to modulating relaxation dynamics single-ion magnets. The metal ions in all...

A novel dodecanuclear wheel with ten Dy(III) ions and two Co(II) bridged by four Schiff-base ligands sixteen acetates represents the highest-nuclearity 3d-4f example of its type displaying single-molecule magnet behaviour.

A discrete dysprosium cubane has been prepared and structurally characterized. Slow relaxation of magnetization in this complex is observed, which may stimulate further investigations into the dynamics lanthanide clusters with different topologies.

A novel octanuclear dysprosium(III) compound, templated by quadruple μ4-CO32− introduced via spontaneous fixation of atmospheric carbon dioxide, shows single-molecule-magnet behaviour with an obvious hysteresis loop detected a traditional SQUID magnetometer.

Abstract Elaborate chemical design is of utmost importance in order to slow down the relaxation dynamics single‐molecule magnets (SMMs) and hence improve their potential applications. Much interest was devoted study distinct processes related different crystal fields crystallographically independent lanthanide ions. However, assignment specific metal sites remains a challenging task. To address this challenge, new asymmetric Dy 2 SMM displaying well‐separated two‐step process with...

Self-assembly of polydentate Schiff base 2,6-diformyl-4-methylphenol di(benzoy1hydrazone) (H3L), with dysprosium thiocyanate and sodium azide, affords two novel trinuclear triangular circular helicate dysprosium(III) complexes, [Dy3(μ3-OCH3)2(HL)3(SCN)]·4CH3OH·2CH3CN·2H2O (1) or [Dy3(μ3-N3)(μ3-OH)(H2L)3(SCN)3](SCN)·3CH3OH·H2O (2), depending on the presence absence base. Single-crystal X-ray analyses show that μ3-methoxy oxygens cap Dy3 triangle in complex 1 one μ3-OH μ3-N3– 2, representing...

Reactions of LnIII perchlorate (Ln = Gd, Tb, Dy, and Ho), NiCl2·6H2O, a polydentate Schiff base resulted in the assembly novel isostructural hexanuclear Ni4Ln2 complexes [Ln Gd (1), Tb (2), Dy (3), Ho (4)] with an unprecedented 3d–4f metal topology consisting two defect-dicubane units. The corresponding Ni4Y2 (5) complex containing diamagnetic YIII atoms was also isolated to assist magnetic studies. Interestingly, 2 3 exhibit SMM characteristics 4 shows slow relaxation magnetization. absence...

Abstract The self‐assembly of three giant hexagonal 3d–4f metallocycles with inner diameters 16.4, 16.5, and 16.4 Å, is described. Hexagonal were stacked along the crystallographic c axis, producing unique macroscopic tubular single crystals. assembly mechanism crystals was investigated. Remarkably, all show typical single‐molecule magnet behavior, benefiting from ferromagnetic couplings between 3d 4f ions.

Toroidal arrangements of magnetic moments are realized in Tb^IIIand Dy^IIIbased heterometallic macrocycles thanks to the coupling between lanthanide and 3d metal ions.

Two new dysprosium(III) coordination compounds, namely, [Dy(4)(HL)(4)(C(6)H(4)NH(2)COO)(2)(mu(3)-OH)(4)(mu-OH)(2)(H(2)O)(4)].4CH(3)CN.12H(2)O (1) and Dy(8)(HL)(10)(C(6)H(4)NH(2)COO)(2)(mu(3)-OH)(8)(OH)(2)(NO(3))(2)(H(2)O)(4)] (2), have been synthesized from the Schiff-base ligand 2-{[(2-hydroxy-3-methoxyphenyl)methylidene]amino}benzoic acid (H(2)L) dysprosium chloride or nitrate (2). Single-crystal X-ray diffraction studies reveal that compound 1 exhibits a tetranuclear cubane-like structure...

A fusion of polygons: unique Dy10 cluster with four fused Dy3 triangles has been synthesized by incorporating the polydentate Schiff base ligand H4L in two different binding modes its mono- and di-deprotonated state (see figure). This compound represents largest lanthanide based on peculiar triangles, therefore opening a promising route toward design novel magnetic materials.

Two dinuclear triple-stranded helicates [Ln2L3]3+ (Ln = Dy and Tb) obtained viaself-assembly from the ligand HL (2,6-diformyl-4-methylphenol di(benzoylhydrazone)) lanthanide perchlorate have been synthesized characterized. The crystal structural analysis demonstrates that three strands wrap around a pseudo-threefold axis defined by two metal ions, leading to 'meso'-relation between right- (Δ) left-hand (Λ) configurations of in crystal. Each LnIII ion is coordinated nine donor atoms distorted...

Reactions of lanthanide(III) (Ln(III)) perchlorate (Ln = Dy and Ho) a polydentate Schiff base resulted in the unprecedented assembly novel Ln(12) wheels containing six vertex-sharing Ln(3) triangles. The Dy(12) derivative represents largest lanthanide wheel based on peculiar Dy(3) triangles showing slow magnetic relaxation.

We described the syntheses, crystal structures, and magnetic behavior of a novel series heterometallic [Ni(4)M(2)] [M = Gd (1), Dy (2) Y (3)] hexanuclear compounds afforded by reaction rare-earth(III) nitrate, nickel(II) acetate, Schiff-base ligand 2-(2-hydroxy-3-methoxybenzylideneamino)phenol (H(2)L) in mixture ethanol dichloromethane presence triethylamine. Single-crystal X-ray diffraction measurements reveal that all three have metal core made up two Ni(2)MO(4) defective cubanes. The...

The self-assembly of dysprosium(III) with the tailored chemical modification vanillin group affords two decorated Dy(3) compounds, namely, [Dy(3)(μ(3)-OH)(2)(Hpovh(-))(3)(NO(3))(3)(CH(3)OH)(2)H(2)O]·NO(3)·3CH(3)OH·2H(2)O (2) and [Dy(3)(μ(3)-OH)(2)(H(2)vovh(-))(3)Cl(2)(CH(3)OH)(H(2)O)(3)][Dy(3)(μ(3)-OH)(2)(H(2)vovh(-))(3)Cl(2)(H(2)O)(4)]·Cl(4)·2CH(3)OH·2CH(3)CN·7H(2)O (3), where H(2)povh = N-(pyridylmethylene)-o-vanilloylhydrazone H(3)vovh N-vanillidene-o-vanilloylhydrazone. Of particular...

Two new dysprosium(III) complexes, [Dy2(HL1)4(CO3)]·4H2O (1) and [Dy2(L2)2(NO3)2(CH3OH)2]·4CH3CN (2), have been synthesized from the Schiff-base ligands N′-((2-hydroxy-1-naphthyl)methylene)benzohydrazide (H2L1) N′-((2-hydroxy-1-naphthyl)methylene) picolinohydrazide (H2L2). Single-crystal X-ray diffraction studies reveal that four mono-deprotonated H2L1 two di-deprotonated H2L2 which undergone keto–enol tautomerism coordinate to dysprosium centres of complexes 1 2, respectively. The dc...

A magnetic personality: unique dysprosium trigonal prism with a new polydentate Schiff-base ligand behaves as single molecule magnet (SMM), which may stimulate further investigations into the relaxation dynamics of SMMs different topologies (see figure). Detailed facts importance to specialist readers are published "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted by authors. Please note: The publisher is responsible for...

A unique hexanuclear dysprosium(III) compound with a new polydentate Schiff-base ligand shows complex slow relaxation of the magnetization most likely associated single-ion behavior individual Dy(III) ions as well possible weak coupling between them.

As the simplest entity carrying intramolecular magnetic interactions, a dinuclear lanthanide complex serves as model to investigate effects of interactions on relaxation magnetization, and importantly, it proves be an efficient method obtain robust single-molecule magnets via improving communication between centers. Here, three Dy2 complexes (1, 2, 3) with similar structural motif, namely, [Dy2(HL)2(NO3)2(CH3CN)2]·2CH3CN (1), [Dy2(HL)2(NO3)2(DMF)2]·2H2O (2), Dy2(HL)2(NO3)2(DMF)4 (3), were...

The self-assembly of Ln(ClO4)3·6H2O and Zn(OAc)2·2H2O with pyrazine-2-carboxylic acid (HL) results in the formation three novel nanosized {LnIII24ZnII6} triangular metallorings, [Gd24Zn6L24(OAc)22(μ3-OH)30(H2O)14](ClO4)7(OAc)·2CH3OH·26H2O (1), [Tb24Zn6L24(OAc)22(μ3-OH)30(CH3O)2(CH3OH)2(H2O)10](ClO4)5(OH)·6CH3OH·12H2O (2), (H3O)[Dy24Zn6L24(OAc)22(μ3-OH)30(H2O)14](ClO4)7(OAc)2·4CH3OH·22H2O (3), having largest nuclearity among any known Ln/Zn clusters. Magnetic luminescent studies reveal...