High-Nuclearity Manganese and Iron Complexes with the Anionic Ligand Methyl Salicylimidate

Godbole, Meenal D.; Roubeau, Olivier; Mills, Allison M.; Kooijman, Huub; Spek, and Anthony L.; Bouwman, Elisabeth

doi:10.1021/ic0605322

Cited by 41 publications

(27 citation statements)

References 58 publications

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“…Thus the presence of closely spaced spin states near the ground state, in other words, yields a solid‐state‐like behavior that is presumably related to the compact structure of the core. The situation is somewhat different for the similar system reported by Godbole et al.,29 since field‐dependent magnetization clearly shows the sign of a field‐induced spin‐state transition, suggesting a more discrete level structure.…”

Section: Molecular Nanomagnets: Structures and Propertiescontrasting

confidence: 62%

Exploring the No‐Man’s Land between Molecular Nanomagnets and Magnetic Nanoparticles

et al. 2012

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The comparison of the structural and magnetic properties of molecular nanomagnets (MNM) and magnetic nanoparticles (MNP) can be instructive to get a deeper understanding of the magnetic behavior on the intermediate scale between molecular and bulk objects. In this respect iron oxo based clusters are particularly interesting, since they provide an increasing number of molecular systems with sizes close to that of iron oxide MNP. In this Minireview we report a survey of literature data aimed at improving our understanding of the emergence of MNP properties from MNM ones.

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Section: Molecular Nanomagnets: Structures and Propertiescontrasting

confidence: 62%

Exploring the No‐Man’s Land between Molecular Nanomagnets and Magnetic Nanoparticles

et al. 2012

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“…Demzufolge führt die Gegenwart von eng benachbarten Spinzuständen nahe dem Grundzustand zu einem Bulk‐artigen Verhalten. Etwas anders ist die Situation bei einem ähnlichen System, das von Godbole et al 29. beschrieben wurde, bei dem die Messung der feldabhängigen Magnetisierung klare Indizien für einen feldabhängigen Spinzustandsübergang entsprechend einer mehr diskreten Niveaustruktur lieferte.…”

Section: Molekulare Nanomagnete: Strukturen Und Eigenschaftenunclassified

Erforschung des Niemandslandes zwischen molekularen Magneten und magnetischen Nanopartikeln

et al. 2012

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Ein Vergleich der strukturellen und magnetischen Eigenschaften von molekularen Nanomagneten und magnetischen Nanopartikeln kann hilfreich sein, um ein tieferes Verständnis des magnetischen Verhaltens im Zwischenbereich zwischen molekularen und Bulkobjekten zu gewinnen. In dieser Hinsicht sind Eisen‐Oxo‐Cluster besonders interessant, weil hier eine Reihe von molekularen Systemen existiert, die der Größe von magnetischen Eisenoxid‐Nanopartikeln nahekommen. In diesem Kurzaufsatz geben wir einen Überblick über Literaturdaten, mit dem Ziel, ein besseres Verständnis davon zu erlangen, wie die Eigenschaften molekularer Nanomagnete in magnetischen Nanopartikeln in Erscheinung treten und umgekehrt.

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“…The coordination chemistry of this ligand, however, appears to be very rich. [17] Reaction of Mn(ClO 4 ) 2 with Hmesalim in ethanol unexpectedly results in the formation of the dinuclear, phenoxo bridged complex 1, in which the methoxy group on the ligand is exchanged with the solvent ethoxy group. ESI-MS analyses of a solution of the ligand Hmesalim in ethanol shows two peaks, one for Hmesalim and another for Hetsalim, indicating that the presence of a Lewis acid is not necessary for solvolysis to occur.…”

Section: Synthetic Aspectsmentioning

confidence: 99%

“…In fact two novel clusters, a hexanuclear cluster with an interesting doublecubane structure, and another octanuclear cluster have been isolated and crystallographically characterized after attempts at recrystallization of the mononuclear complex 2. [17] …”

Section: Synthetic Aspectsmentioning

confidence: 99%

Highly Efficient Disproportionation of Dihydrogen Peroxide: Synthesis, Structure, and Catalase Activity of Manganese Complexes of the Salicylimidate Ligand

et al. 2005

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Two complexes, [Mn 2 (etsalim) 4 (Hetsalim) 2 ](ClO 4 ) 2 (1), and [Mn(mesalim) 2 (OAc)(MeOH)]·MeOH (2), in which Hmesalim and Hetsalim are methyl and ethyl salicylimidate, respectively, have been synthesized, fully characterized by X-ray analyses, magnetic susceptibility, UV/Vis and IR spectroscopy, and their catalase activity has been studied. Complex 1 is dinuclear and shows an Mn−Mn distance of 3.37 Å while complex 2 is mononuclear. Both complexes catalyze the disproportionation of hydrogen peroxide into water and dioxygen; they show very high catalase activity exhibiting saturation kinetics in the presence of NaOH. The rate and turnover number of the catalyzed reaction increase dramatically when a few equivalents of base (NaOH) are added to the reaction mixture. The turnover numbers for hydrogen peroxide disproportionation increase from approximately 200 to more than 1500 per manganese ion in less than 2 min for both com-

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High-Nuclearity Manganese and Iron Complexes with the Anionic Ligand Methyl Salicylimidate

Abstract: The three novel clusters [Mn 6

Cited by 41 publications

References 58 publications

Exploring the No‐Man’s Land between Molecular Nanomagnets and Magnetic Nanoparticles

Exploring the No‐Man’s Land between Molecular Nanomagnets and Magnetic Nanoparticles

Erforschung des Niemandslandes zwischen molekularen Magneten und magnetischen Nanopartikeln

Highly Efficient Disproportionation of Dihydrogen Peroxide: Synthesis, Structure, and Catalase Activity of Manganese Complexes of the Salicylimidate Ligand

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