Molecular Nanomagnets and Related Phenomena

Gao, Song; Affronte, Marco

doi:10.1007/978-3-662-45723-8

Cited by 111 publications

(8 citation statements)

References 65 publications

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“…Elemental analysis (%) calculated (found): C 46. 16 (2). To a solution of [Cr III L 3 ] (108 mg, 0.2 mmol) in 10 mL of dichloromethane, a solution of Ni(ClO 4 ) 2 •6H 2 O (73 mg, 0.2 mmol) was added in 10 mL of acetonitrile.…”

Section: Synthesismentioning

confidence: 99%

“…Heterometallic coordination complexes have seen application in areas as diverse as metalloprotein chemistry [1,2], catalysis [3], porous materials [4,5], and magnetism [6]. The latter includes three-dimensional (3D) networks [7], two-dimensional (2D) sheets [8], one-dimensional (1D) chains [9], and zero-dimensional (0D) (molecular) polygons and polyhedra [10,11], investigating controllable exchange interactions [12], enhanced magnetocaloric effects [13], spin frustration [14], slow relaxation of the magnetisation [15,16], and quantum coherence timescales [17]. A search of the Cambridge Structural Database (CSD) reveals that heterometallic wheels of varying size and metal ratios dominate the chemistry of polymetallic clusters containing both Cr III and Ni II ions with a nuclearity of four or more.…”

Section: Introductionmentioning

confidence: 99%

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[CrIII8NiII6]n+ Heterometallic Coordination Cubes

et al. 2021

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Three new heterometallic [CrIII8NiII6] coordination cubes of formulae [CrIII8NiII6L24(H2O)12](NO3)12 (1), [CrIII8NiII6L24(MeCN)7(H2O)5](ClO4)12 (2), and [CrIII8NiII6L24Cl12] (3) (where HL = 1-(4-pyridyl)butane-1,3-dione), were synthesised using the paramagnetic metalloligand [CrIIIL3] and the corresponding NiII salt. The magnetic skeleton of each capsule describes a face-centred cube in which the eight CrIII and six NiII ions occupy the eight vertices and six faces of the structure, respectively. Direct current magnetic susceptibility measurements on (1) reveal weak ferromagnetic interactions between the CrIII and NiII ions, with JCr-Ni = + 0.045 cm−1. EPR spectra are consistent with weak exchange, being dominated by the zero-field splitting of the CrIII ions. Excluding wheel-like structures, examples of large heterometallic clusters containing both CrIII and NiII ions are rather rare, and we demonstrate that the use of metalloligands with predictable bonding modes allows for a modular approach to building families of related polymetallic complexes. Compounds (1)–(3) join the previously published, structurally related family of [MIII8MII6] cubes, where MIII = Cr, Fe and MII = Cu, Co, Mn, Pd.

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Section: Synthesismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

[CrIII8NiII6]n+ Heterometallic Coordination Cubes

et al. 2021

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“…Despite recent progress [21][22][23][24] engineering the magnetic properties of such systems remains a challenging task and it still requires a lot of efforts to pave the route towards their rationalization and industrial application. Let's emphasize that the compound's magnetic behavior is tightly related to the type, number and coordination of ligands with respect to the composing magnetic centers [25][26][27]. These has been the subject of extensive interest, here we mention only some prominent and most recent examples, such as the mononuclear β-diketonate Dy 3+ single molecular magnet [28], tetranuclear lanthanide metallocene complexes [29], the tetravanadate [V 4 O 12 ] 4− anion bridged Cu 2+ complexes [30] and the single-ion Co 2+ one [31].…”

Section: Introductionmentioning

confidence: 99%

Magnetostructural Dependencies in $3d^2$ Systems: The Trigonal Bipyramidal V$^{3+}$ Complex

Georgiev,

Chamati

2022

Preprint

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We introduce a multi-configurational approach to study the magneto-structural correlations in 3d 2 systems. The theoretical framework represents a restricted active space self-consistent field method, with active space optimized to the number of all non-bonding orbitals. To demonstrate the validity and effectiveness of the method, we explore the physical properties of the trigonal bipyramidal spin-one single-ion magnet (C 6 F 5 ) 3 trenVCN t Bu. The obtained theoretical results show a good agreement with the experimental data available in the literature. This includes measurements for the magnetization, low-field susceptibility, cw-EPR and photoluminescence spectroscopy. The proposed method may be reliably applied to a variety of 3d 2 magnetic systems. To this end, and for the sake completeness, we provide detailed analytical and numerical representations for the generic Hamiltonian's effective matrix elements related to the crystal field, exchange, spin-orbit and Zeeman interactions.

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“…Heterometallic coordination complexes have seen application in areas as diverse as metalloprotein chemistry [1,2], catalysis [3], porous materials [4,5], and magnetism [6]. The latter includes 3D networks [7], 2D sheets [8], 1D chains [9], and 0D (molecular) polygons and polyhedral [10,11], investigating controllable exchange interactions [12], enhanced magnetocaloric effects [13], spin frustration [14], slow relaxation of the magnetization [15,16], and quantum coherence timescales [17]. A search of the Cambridge Structural Database (CSD) reveals that heterometallic wheels of varying size and metal ratios dominate the chemistry of polymetallic clusters containing both Cr III [18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

[CrIII8NiII6]n+ Heterometallic Coordination Cubes

O’Connor¹,

Sanz²,

Scott³

et al. 2021

Preprint

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Three new heterometallic [CrIII8NiII6] coordination cubes of formulae [CrIII8NiII6L24(H2O)12](NO3)12 (1), [CrIII8NiII6L24(MeCN)7(H2O)5](ClO4)12 (2) and [CrIII8NiII6L24Cl12] (3) (where HL = 1-(4-pyridyl)butane-1,3-dione), were synthesised using the paramagnetic metalloligand [CrIIIL3] and the corresponding NiII salt. The magnetic skeleton of each capsule describes a face-centred cube in which the eight CrIII and six NiII ions occupy the eight vertices and six faces of the structure, respectively. Direct current magnetic susceptibility measurements on (1) reveal weak ferromagnetic interactions between the CrIII and NiII ions, with JCr-Ni = +0.045 cm-1 . EPR spectra are consistent with weak exchange, being dominated by the zero-field splitting of the CrIII ions. Excluding wheel-like structures, examples of large heterometallic clusters containing both CrIII and NiII ions are rather rare, and we demonstrate that the use of metalloligands with predictable bonding modes allows for a modular approach to building families of related polymetallic complexes. Compounds (1)-(3) join the previously published, structurally related family of [MIII8MII6] cubes, where MIII = Cr, Fe and MII = Cu, Co, Mn, Pd. <br>

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Molecular Nanomagnets and Related Phenomena

Cited by 111 publications

References 65 publications

[CrIII8NiII6]n+ Heterometallic Coordination Cubes

[CrIII8NiII6]n+ Heterometallic Coordination Cubes

Magnetostructural Dependencies in $3d^2$ Systems: The Trigonal Bipyramidal V$^{3+}$ Complex

[CrIII8NiII6]n+ Heterometallic Coordination Cubes

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