Ferromagnetic manganese "cubes": From PSII to single-molecule magnets

Ross Inglis; Constantinos C. Stoumpos; Alessandro Prescimone; Milosz Siczek; Tadeusz Lis; Wolfgang Wernsdorfer; Euan K. Brechin; Constantinos J. Milios

doi:10.1039/b925248g

Ferromagnetic manganese "cubes": From PSII to single-molecule magnets

Ross Inglis, Constantinos C. Stoumpos, Alessandro Prescimone, Milosz Siczek, Tadeusz Lis, Wolfgang Wernsdorfer, Euan K. Brechin, Constantinos J. Milios

Chemistry

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Abstract

The reaction of Mn(O₂CMe)₂·2H₂O with Me-saoH₂ (Me-saoH₂= 2-hydroxyphenylethanone oxime) in MeCN forms the complex [Mn^III₄(Me-sao) ₄(Me-saoH)₄] (1) in good yields. Replacing Me-saoH ₂ with Naphth-saoH₂ (Naphth-saoH₂ = 2-hydroxy-1-napthaldoxime) in the presence of CH₃ONa forms the complex [Mn^III₄(Naphth-sao)₄(Naphth-saoH) ₄] (2) in low yields, while the reaction between Mn(ClO ₄)₂·6H₂O, Et-saoH₂ (Et-saoH₂= 2-hydroxypropiophenone oxime) and NBu₄OH in MeCN gives the complex [Mn^III₄(Et-sao)₄(Et- saoH)₄] (3) in moderate yields. All three tetrametallic cages exclusively contain Mn^III centres arranged in a "cube"-like topology, in which the metal centres are connected by-N-O_oximate groups. The magnetic properties of 1-3 are near identical, revealing the presence of only ferromagnetic interactions between the metal ions leading to high-spin ground states of S = 8. The complexes display frequency dependent out-of-phase signals in ac susceptibility studies and, in the case of 1 single-molecule magnetism has been observed by means of single-crystal hysteresis loop measurements.

Original language	English (US)
Pages (from-to)	4777-4785
Number of pages	9
Journal	Dalton Transactions
Volume	39
Issue number	20
DOIs	https://doi.org/10.1039/b925248g
State	Published - 2010

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Inorganic Chemistry

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@article{3f6b50ca91fc404db83395b74afab1c6,

title = "Ferromagnetic manganese {"}cubes{"}: From PSII to single-molecule magnets",

abstract = "The reaction of Mn(O2CMe)2·2H2O with Me-saoH2 (Me-saoH2= 2-hydroxyphenylethanone oxime) in MeCN forms the complex [MnIII4(Me-sao) 4(Me-saoH)4] (1) in good yields. Replacing Me-saoH 2 with Naphth-saoH2 (Naphth-saoH2 = 2-hydroxy-1-napthaldoxime) in the presence of CH3ONa forms the complex [MnIII4(Naphth-sao)4(Naphth-saoH) 4] (2) in low yields, while the reaction between Mn(ClO 4)2·6H2O, Et-saoH2 (Et-saoH2= 2-hydroxypropiophenone oxime) and NBu4OH in MeCN gives the complex [MnIII4(Et-sao)4(Et- saoH)4] (3) in moderate yields. All three tetrametallic cages exclusively contain MnIII centres arranged in a {"}cube{"}-like topology, in which the metal centres are connected by-N-Ooximate groups. The magnetic properties of 1-3 are near identical, revealing the presence of only ferromagnetic interactions between the metal ions leading to high-spin ground states of S = 8. The complexes display frequency dependent out-of-phase signals in ac susceptibility studies and, in the case of 1 single-molecule magnetism has been observed by means of single-crystal hysteresis loop measurements.",

author = "Ross Inglis and Stoumpos, {Constantinos C.} and Alessandro Prescimone and Milosz Siczek and Tadeusz Lis and Wolfgang Wernsdorfer and Brechin, {Euan K.} and Milios, {Constantinos J.}",

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language = "English (US)",

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T1 - Ferromagnetic manganese "cubes"

T2 - From PSII to single-molecule magnets

AU - Inglis, Ross

AU - Stoumpos, Constantinos C.

AU - Prescimone, Alessandro

AU - Siczek, Milosz

AU - Lis, Tadeusz

AU - Wernsdorfer, Wolfgang

AU - Brechin, Euan K.

AU - Milios, Constantinos J.

PY - 2010

Y1 - 2010

N2 - The reaction of Mn(O2CMe)2·2H2O with Me-saoH2 (Me-saoH2= 2-hydroxyphenylethanone oxime) in MeCN forms the complex [MnIII4(Me-sao) 4(Me-saoH)4] (1) in good yields. Replacing Me-saoH 2 with Naphth-saoH2 (Naphth-saoH2 = 2-hydroxy-1-napthaldoxime) in the presence of CH3ONa forms the complex [MnIII4(Naphth-sao)4(Naphth-saoH) 4] (2) in low yields, while the reaction between Mn(ClO 4)2·6H2O, Et-saoH2 (Et-saoH2= 2-hydroxypropiophenone oxime) and NBu4OH in MeCN gives the complex [MnIII4(Et-sao)4(Et- saoH)4] (3) in moderate yields. All three tetrametallic cages exclusively contain MnIII centres arranged in a "cube"-like topology, in which the metal centres are connected by-N-Ooximate groups. The magnetic properties of 1-3 are near identical, revealing the presence of only ferromagnetic interactions between the metal ions leading to high-spin ground states of S = 8. The complexes display frequency dependent out-of-phase signals in ac susceptibility studies and, in the case of 1 single-molecule magnetism has been observed by means of single-crystal hysteresis loop measurements.

AB - The reaction of Mn(O2CMe)2·2H2O with Me-saoH2 (Me-saoH2= 2-hydroxyphenylethanone oxime) in MeCN forms the complex [MnIII4(Me-sao) 4(Me-saoH)4] (1) in good yields. Replacing Me-saoH 2 with Naphth-saoH2 (Naphth-saoH2 = 2-hydroxy-1-napthaldoxime) in the presence of CH3ONa forms the complex [MnIII4(Naphth-sao)4(Naphth-saoH) 4] (2) in low yields, while the reaction between Mn(ClO 4)2·6H2O, Et-saoH2 (Et-saoH2= 2-hydroxypropiophenone oxime) and NBu4OH in MeCN gives the complex [MnIII4(Et-sao)4(Et- saoH)4] (3) in moderate yields. All three tetrametallic cages exclusively contain MnIII centres arranged in a "cube"-like topology, in which the metal centres are connected by-N-Ooximate groups. The magnetic properties of 1-3 are near identical, revealing the presence of only ferromagnetic interactions between the metal ions leading to high-spin ground states of S = 8. The complexes display frequency dependent out-of-phase signals in ac susceptibility studies and, in the case of 1 single-molecule magnetism has been observed by means of single-crystal hysteresis loop measurements.

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EP - 4785

JO - Dalton Transactions

JF - Dalton Transactions

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ER -

Ferromagnetic manganese "cubes": From PSII to single-molecule magnets

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