A Family of CoIICoIII3 Single-Ion Magnets with Zero-Field Slow Magnetic Relaxation: Fine Tuning of Energy Barrier by Remote Substituent and Counter Cation

A possible relation between the value of the axial Zero Field Splitting and the occurrence of field-induced slow magnetic relaxation has been established for a new gadolinium(iii) compound.

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Slow magnetic relaxation in dinuclear dysprosium and holmium phenoxide bridged complexes: a Dy2 single molecule magnet with a high energy barrier

Inorganic Chemistry Frontiers ◽

10.1039/d1qi00152c ◽

2021 ◽

Author(s):

Matilde Fondo ◽

Julio Corredoira-Vázquez ◽

Ana M. Garcia-Deibe ◽

Jesus Sanmartin Matalobos ◽

Silvia Gómez-Coca ◽

...

Keyword(s):

Crystal Structures ◽

Single Molecule ◽

Energy Barrier ◽

Magnetic Relaxation ◽

High Energy ◽

Single Molecule Magnet ◽

High Energy Barrier ◽

Slow Magnetic Relaxation

Dinuclear [M(H3L1,2,4)]2 (M = Dy, Dy2; M = Ho, Ho2) complexes were isolated from an heptadentate aminophenol ligand. The crystal structures of Dy2·2THF, and the pyridine adducts Dy2·2Py and Ho2·2Py,...

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Zero‐field slow magnetic relaxation behavior of Dy2 in a series of Dinuclear {Ln2} (Ln = Dy, Tb, Gd and Er) complexes: A combined experimental and theoretical study

European Journal of Inorganic Chemistry ◽

10.1002/ejic.202100983 ◽

2021 ◽

Author(s):

Soumalya Roy ◽

Pooja Shukla ◽

Prem Prakash Sahu ◽

Yu-Chen Sun ◽

Naushad Ahmed ◽

...

Keyword(s):

Magnetic Relaxation ◽

Theoretical Study ◽

Relaxation Behavior ◽

Zero Field ◽

Slow Magnetic Relaxation

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Structural anisotropy of cyanido-bridged {CoII9WV6} single-molecule magnets induced by bidentate ligands: towards the rational enhancement of an energy barrier

Chemical Communications ◽

10.1039/c5cc10371a ◽

2016 ◽

Vol 52 (26) ◽

pp. 4772-4775 ◽

Cited By ~ 21

Author(s):

Szymon Chorazy ◽

Michał Rams ◽

Anna Hoczek ◽

Bernard Czarnecki ◽

Barbara Sieklucka ◽

...

Keyword(s):

Single Molecule ◽

Energy Barrier ◽

Magnetic Relaxation ◽

Bidentate Ligands ◽

Single Molecule Magnets ◽

Structural Anisotropy ◽

Slow Magnetic Relaxation

{CoII9[WV(CN)8]6} clusters capped by odd and even number of bidentate ligands reveal the improved slow magnetic relaxation due to the significant structural anisotropy.

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Polyoxometalate-Supported Lanthanoid Single-Molecule Magnets

Australian Journal of Chemistry ◽

10.1071/ch14166 ◽

2014 ◽

Vol 67 (11) ◽

pp. 1542 ◽

Cited By ~ 24

Author(s):

Michele Vonci ◽

Colette Boskovic

Keyword(s):

Single Molecule ◽

Energy Barrier ◽

Magnetic Relaxation ◽

Donor Ligands ◽

Single Molecule Magnets ◽

Single Molecule Magnet ◽

Coordination Numbers ◽

Oxygen Donor ◽

Slow Magnetic Relaxation

Polyoxometalates are robust and versatile multidentate oxygen-donor ligands, eminently suitable for coordination to trivalent lanthanoid ions. To date, 10 very different structural families of such complexes have been found to exhibit slow magnetic relaxation due to single-molecule magnet (SMM) behaviour associated with the lanthanoid ions. These families encompass complexes with between one and four of the later lanthanoid ions: Tb, Dy, Ho, Er, and Yb. The lanthanoid coordination numbers vary between six and eleven and a range of coordination geometries are evident. The highest energy barrier to magnetisation reversal measured to date for a lanthanoid–polyoxometalate SMM is Ueff/kB = 73 K for the heterodinuclear Dy–Eu compound (Bu4N)8H4[DyEu(OH)2(γ-SiW10O36)2].

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Nitronyl Nitroxide Biradical-Based Binuclear Lanthanide Complexes: Structure and Magnetic Properties

Magnetochemistry ◽

10.3390/magnetochemistry6040048 ◽

2020 ◽

Vol 6 (4) ◽

pp. 48

Author(s):

Lu Xi ◽

Jing Han ◽

Xiaohui Huang ◽

Licun Li

Keyword(s):

Magnetic Properties ◽

Magnetic Relaxation ◽

Lanthanide Complexes ◽

Magnetic Data ◽

Antiferromagnetic Coupling ◽

Zero Field ◽

Nitronyl Nitroxide ◽

Ferromagnetic Exchange ◽

Binuclear Structure ◽

Slow Magnetic Relaxation

Employing a new nitronyl nitroxide biradical NITPhPzbis(NITPhPzbis = 5-(1-pyrazolyl)-1,3-bis(1’-oxyl-3’-oxido-4’,4’,5’,5’-tetramethyl-4,5-hydro-1H-imidazol-2-yl)benzene), a series of 2p-4f complexes [Ln2(hfac)6(H2O)(NITPhPzbis)] (LnIII = Gd1, Tb2, Dy3; hfac = hexafluoroacetylacetonate) were successfully synthesized. In complexes 1–3, the designed biradical NITPhPzbis coordinates with two LnIII ions in chelating and bridging modes to form a four-spin binuclear structure. Direct-current magnetic study of Gd analogue indicates that ferromagnetic exchange exists between the Gd ion and the radical while antiferromagnetic coupling dominates between two mono-radicals. Dynamic magnetic data show that the χ” signals of complex 3 exhibit frequency dependence under zero field, demonstrating slow magnetic relaxation behavior in complex 3. And the estimated values of Ueff and τ0 are about 8.4 K and 9.1 × 10−8 s, respectively.

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Zero-field slow magnetic relaxation in a uranium(iii) complex with a radical ligand

Chemical Communications ◽

10.1039/c4cc04486j ◽

2014 ◽

Vol 50 (71) ◽

pp. 10262-10264 ◽

Cited By ~ 21

Author(s):

Joana T. Coutinho ◽

Maria A. Antunes ◽

Laura C. J. Pereira ◽

Joaquim Marçalo ◽

Manuel Almeida

Keyword(s):

Single Molecule ◽

Magnetic Relaxation ◽

Zero Field ◽

Single Molecule Magnet ◽

Slow Magnetic Relaxation ◽

Bipyridine Ligand ◽

Radical Ligand

Single-molecule-magnet behaviour in [U(TpMe2)2(bipy˙)], a U(iii) complex with a radical bipyridine ligand, having magnetic contributions from both the metal and the ligand.

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