A [Mn18Dy] SMM resulting from the targeted replacement of the central MnIIin the S = 83/2 [Mn19]-aggregate with DyIII

Ako, Ayuk M.; Mereacre, Valeriu; Clérac, Rodolphe; Wernsdorfer, Wolfgang; Hewitt, Ian J.; Anson, Christopher E.; Powell, Annie K.

doi:10.1039/b814614d

Cited by 190 publications

(92 citation statements)

References 31 publications

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“…(2) 293 (2) 293 (2) 293 (2) 293(2) a (Å) 10.057 (4) 10.0559 (16) 10.0369 (11) 10.020 (3) 10.051(2) b (Å) 11.090 (4) 11.0995 (18) 11.0999 (12) 11.088 (3) 11.113(2) c (Å) 12.102 (4) 12.0981 (19) 12.0690 (13) one with chelating coordination mode, yielding a distorted square-antiprism geometry (Fig. (2) 293 (2) 293 (2) 293 (2) 293(2) a (Å) 10.057 (4) 10.0559 (16) 10.0369 (11) 10.020 (3) 10.051(2) b (Å) 11.090 (4) 11.0995 (18) 11.0999 (12) 11.088 (3) 11.113(2) c (Å) 12.102 (4) 12.0981 (19) 12.0690 (13) one with chelating coordination mode, yielding a distorted square-antiprism geometry (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Initially, much emphasis has been placed on incorporating the transition-metal ions into such clusters especially containing the high spin Mn III ion which contributes a large spin and uniaxial anisotropy. 10 Thus, inspired by this prospected incorporation, in the quest for new SMMs synthetic efforts have recently been focused not only on the pure 3d 5f,11 and 4f clusters, 12 but also on heterometallic 3d-4f 13 and even 3d-5f clusters. 8 However, the empirical finding that D is inversely proportional to S suggests that increasing the cluster size to merely augment the spin to very high values may not necessarily be the best strategy to ensure SMM behavior at times.…”

Section: Introductionmentioning

confidence: 99%

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[Ln^III–Mn^II–Ln^III] heterometallic compounds: rare linear SMMs with divalent manganese ions

Min

Wang

et al. 2015

Dalton Trans.

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The reaction of Mn(OAc)2·4H2O and Ln(NO3)3·6H2O with N-(2-aminopropyl)-2-hydroxybenzamide and salicylic aldehyde in methanol/methylene dichloride produces yellow crystals of Ln2Mn(C7H5O2)8 (Ln = Gd (), Tb (), Dy (), Ho () and Er ()), in the presence of triethylamine. Three metal ions are connected by six μ2-phenolate oxygen atoms of six salicylic aldehyde ligands, resulting in perfect linear [Ln(III)-Mn(II)-Ln(III)] structures. Magnetic studies of these complexes have been performed and AC susceptibility measurements show the presence of a temperature-dependent out-of-phase ac signal for complexes and indicating single-molecule magnet (SMM) behavior. The Dy(III)2Mn(II) compound shows double relaxation pathways which may originate from the single ion behavior of individual Dy(III) ions and the weak coupling between Dy(III) and Mn(II) ions, respectively. The Ueff of 92.4(2) K is a relatively high value among 3d-4f SMMs. Moreover, complexes and represent the first linear Mn-Ln SMMs containing only divalent manganese ions as far as we know. The result suggests the positive effects of magnetic coupling to enhance their SMM behavior, presenting a promising strategy for constructing efficient heterometallic SMMs.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

[Ln^III–Mn^II–Ln^III] heterometallic compounds: rare linear SMMs with divalent manganese ions

Min

Wang

et al. 2015

Dalton Trans.

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“…In this complex, H 3 L 1 coordinates in a dianionic form of (HL 1 ) 2À similar to that observed in complex 1, with the phenol and one of the alkoxyl groups deprotonated. [20] By linkage of the multiple bridges, a very rare Mn III 3 Mn II Na I core [10] is formed. Then, each of the alkoxo O atoms further bridges an equatorial Mn atom.…”

Section: Description Of the Structuresmentioning

confidence: 99%

Polynuclear Complexes with Alkoxo and Phenoxo Bridges from In Situ Generated Hydroxy‐Rich Schiff Base Ligands: Syntheses, Structures, and Magnetic Properties

Ding

Chen

et al. 2013

Chemistry A European J

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Complexes of new Schiff base ligands generated in situ from the reaction of 1-aminoglycerol, aldehydes, and metal ions are reported. [Cu4(HL(1))4] (1) and [Ni4O(HL(1))3(H2O)3)]⋅6 H2O⋅DMF⋅DMSO (2) have M4O4 cubane cores, with the L/M molar ratios of 4:4 and 3:4, respectively. [Mn(III)3Mn(II)NaOCl4(HL(1))3]⋅3 MeCN (3) has a unique pentanuclear trigonal propeller-shaped Mn(III)3Mn(II)Na core structure, and the coordination assemblies are linked by hydrogen bonds to afford a 3D channel structure. [Cu2(HL(2))2] (4) has a bis(μ2-alkoxo)-bridged Cu2O2 core, with the binuclear species linked by hydrogen bonds to afford a 1D double-chain. [Ni7(OH)2(OCH3)4(H2L(3)2(MeOH)2(H2O)2]-(ClO4)2⋅10 H2O (5) has a heptanuclear structure containing heptadentate di-Schiff base ligands, with the nickel(II) ions bridged by phenoxo, alkoxo, hydroxo, and methoxo groups to afford a very rare face-sharing hexadruple defective cubane core with a Ni@Ni6 arrangement. The lattice water molecules are linked by hydrogen bonds to form helical chains, which are further hydrogen-bonded to the coordination moieties to afford a 2D network. Variable temperature magnetic susceptibility measurements and nonlinear data-fitting revealed that the "2+4" type of cubane complex 1 shows medium intradimeric ferromagnetic interactions and weak interdimeric ferromagnetic interactions. For complexes 2 and 5, coexistent ferro- and antiferromagnetic couplings afford a non-zero spin ground state. However, compound 3 shows antiferromagnetic interactions between Mn(III) and Mn(II) , and ferromagnetic interactions between the Mn(III) centers, resulting in a global antiferromagnetic behavior. In conclusion, the reaction of 1-aminoglycerol with aldehydes and metal salts afforded polynuclear complexes with a rich structural diversity and remarkable magnetic behavior.

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“…Recently, some of us have developed synthetic methodologies through which structurally related cluster systems displaying interesting topologies and/or exhibiting fascinating magnetic properties can be assembled. 26,27 Some of these synthetic advances have been employed in the preparation of Mn 19 (R) clusters. In the following, the abbreviation Mn 19 (R) refers to the respective Mn 19 clusters without counterions and noncoordinated solvent molecules, with R the para-substituent on the phenolic organic ligands.…”

Section: ■ Introductionmentioning

confidence: 99%

Reduction of Mn₁₉ Coordination Clusters on a Gold Surface

et al. 2015

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and Mn III ions in the powder sample. Brillouin function fits to the field-dependent magnetization suggest that the total spin ground state in the submonolayer is much lower than S TOT = 83/2 of the pristine molecules. These findings suggest that significant changes of the electronic structure, molecular geometry, and intramolecular exchange coupling take place upon surface deposition. A sample with coverage of 2−3 monolayers shows the presence of Mn III , suggesting that a decoupling layer could stabilize the Mn 19 core on a metallic surface.

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A [Mn₁₈Dy] SMM resulting from the targeted replacement of the central Mn^IIin the S = 83/2 [Mn₁₉]-aggregate with Dy^III

Cited by 190 publications

References 31 publications

[Ln^III–Mn^II–Ln^III] heterometallic compounds: rare linear SMMs with divalent manganese ions

[Ln^III–Mn^II–Ln^III] heterometallic compounds: rare linear SMMs with divalent manganese ions

Polynuclear Complexes with Alkoxo and Phenoxo Bridges from In Situ Generated Hydroxy‐Rich Schiff Base Ligands: Syntheses, Structures, and Magnetic Properties

Reduction of Mn₁₉ Coordination Clusters on a Gold Surface

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A [Mn18Dy] SMM resulting from the targeted replacement of the central MnIIin the S = 83/2 [Mn19]-aggregate with DyIII

Cited by 190 publications

References 31 publications

[LnIII–MnII–LnIII] heterometallic compounds: rare linear SMMs with divalent manganese ions

[LnIII–MnII–LnIII] heterometallic compounds: rare linear SMMs with divalent manganese ions

Polynuclear Complexes with Alkoxo and Phenoxo Bridges from In Situ Generated Hydroxy‐Rich Schiff Base Ligands: Syntheses, Structures, and Magnetic Properties

Reduction of Mn19 Coordination Clusters on a Gold Surface

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A [Mn₁₈Dy] SMM resulting from the targeted replacement of the central Mn^IIin the S = 83/2 [Mn₁₉]-aggregate with Dy^III

[Ln^III–Mn^II–Ln^III] heterometallic compounds: rare linear SMMs with divalent manganese ions

[Ln^III–Mn^II–Ln^III] heterometallic compounds: rare linear SMMs with divalent manganese ions

Reduction of Mn₁₉ Coordination Clusters on a Gold Surface