Lanthanide Assemblies and Polymetallic Complexes

Faulkner, Stephen; Sykes, Daniel

doi:10.1007/4243_2010_4

Cited by 2 publications

(2 citation statements)

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“…The synthesis of molecular lanthanide compounds has attracted intense research interest due to their applications in catalysis, − luminescence, − and magnetism. − In terms of magnetism, 4f coordination and organometallic compounds have been extensively investigated for their single-molecule magnet (SMM) and single-ion magnet (SIM) properties. ,,,− Potential applications of SMMs are high-density data storage, molecular spintronics, and quantum computing devices. − The general approach for new SMMs is to aim for systems with large ground spin states and enhanced negative Ising (or easy axis) magnetoanisotropy (D). ,− Easy axis means that the magnetization is preferentially oriented along one direction. In 4f metal chemistry the coordination compounds of Tb(III), Ho(III), and especially Dy(III) were extensively studied as SMMs in the last few years. − They feature high spins and intrinsic magnetic anisotropy along with strong spin-orbit coupling.…”

Section: Introductionmentioning

confidence: 99%

Tetranuclear and Pentanuclear Compounds of the Rare-Earth Metals: Synthesis and Magnetism

et al. 2015

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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. The proligand (H3L) was used with dibenzoylmethane (DBMH) or acetylacetone (acacH) with lanthanides giving compounds with varying arrangements of metal atoms and nuclearities. The tetranuclear compound {[Dy4(L)3(DBM)4][Et3NH]} (1) and pentanuclear compound {[Dy5(μ3-OH)2(L)3(DBM)4(MeOH)4]·4(MeOH)} (2) were obtained from the ligand (L)(3-) and dibenzoylmethane. The tetranuclear compounds {[Dy4(μ4-OH)(L)2(acac)4(MeOH)2(EtOH)(H2O)]·(NO3)·2(MeOH)·3(EtOH)} (3) and {[Ln4(μ3-OH)2(L)(HL)(acac)5(H2O)] (HNEt3)(NO3)·2(Et2O)} (Ln = Tb (4), Dy (5), Ho (6), and Tm (7)) resulted when the ligand (L)(3-) was used in the presence of acetylacetone. In the solid state structures, the tetranuclear compound 1 adopts a linear arrangement of metal atoms, while tetranuclear compound 3 has a square grid arrangement of metal atoms, and tetranuclear compounds 4-7 have a seesaw-shaped arrangement of metal atoms. The composition found from single-crystal X-ray analysis of compound 1 and 3-7 is supported by electrospray ionization mass spectrometry (ESI-MS). The magnetic studies on compounds 1 suggest the presence of weak ferromagnetic interactions, whereas compounds 2-6 exhibit weak antiferromagnetic interactions between neighboring metal centers. Compounds 1, 2, and 3 also show single-molecule magnet behavior under an applied dc field.

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Section: Introductionmentioning

confidence: 99%

Tetranuclear and Pentanuclear Compounds of the Rare-Earth Metals: Synthesis and Magnetism

et al. 2015

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“…Coordination chemistry of lanthanide ions has been increasingly exploited research area because of its interesting magnetic, [1][2][3][4] luminescent [5][6][7][8][9][10][11][12][13][14] , catalytic applications. [15][16][17][18][19] Various multinuclear lanthanide clusters with remarkable structures, including Ln 48 , [20] Ln 60 , [21,22] Ln 72 , [23] , Ln 104 , [24] have been synthesized.…”

Section: Introductionmentioning

confidence: 99%

Tuning Nuclearity of Dysprosium (III) Complexes by Controlling Substitution on Ligand Molecule

et al. 2020

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This work reports isolation of three multinuclear complexes of Dy(III) ion ([DyIII2(L‐NO2)2(Ph3PO)2(NO3)2] (1), [DyIII5(L)6(Ph3PO)(NO3)(H2O)2(μ3‐OH)2] (2), [DyIII6(L–CH3)6(Ph3PO)2 (μ3‐OH)3(NO3)2 (CH3OH)2] (3)]) by controlling substitution on ligand molecule. The reactions of substituted Schiff‐base ligands (H2L−R; R=NO2 (1), R=H (2), R=CH3 (3)), triphenylphosphine oxide(Ph3PO) with Dy(NO3)3 ⋅ 6H2O in the presence of triethyl amine afford three multinuclear complexs with varing nuclearity, topologies. This work demonstrates effect of substitution on ligand molecules that leads to the isolation of diffrent complexes in the presence of similar reaction conditions.These complexes have been charaterized by single crystal X‐ray diffration (SC‐XRD), High resolution mass spectrometry (HR‐MS). In order to study magnetic behaviour of complexes 1–3, direct current (dc) magnetic susceptibilities have aslo been measured. The effect of substitution on ligand has also been demonstrated by computational studies.

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Lanthanide Assemblies and Polymetallic Complexes

Abstract: In this chapter, we discuss how luminescent lanthanides can be incorporated into complex architectures, and use the systems described to illustrate key aspects of the behaviour of lanthanide containing assemblies in the solid state and in solution.

Cited by 2 publications

References 65 publications

Tetranuclear and Pentanuclear Compounds of the Rare-Earth Metals: Synthesis and Magnetism

Tetranuclear and Pentanuclear Compounds of the Rare-Earth Metals: Synthesis and Magnetism

Tuning Nuclearity of Dysprosium (III) Complexes by Controlling Substitution on Ligand Molecule

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