Einzelmolekül-Magnete: unterschiedliche Raten des resonanten Tunnelns der Magnetisierung in Mn12-Komplexen

Ruiz, D. E.; Sun, Zheng; Albela, Belén; Folting, Kirsten; Ribas, Joan; Christou, George; Hendrickson, David N.

doi:10.1002/(sici)1521-3757(19980202)110:3<315::aid-ange315>3.0.co;2-2

Cited by 9 publications

(3 citation statements)

References 16 publications

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“…In other derivatives some of the type II Mn ions have either no water molecules, or two water molecules. Four different isomers have been experimentally observed, which correspond to the coordination schemes 1:1:1:1 (as in 1 ),21, 125, 143 1:2:1:0,125, 139 1:1:2:0,125, 140 and 2:2:0:065, 125, 141, 142 (the notation indicates the water coordination number of the type II Mn ions).…”

Section: Mn12ac and Single‐molecule Magnetsmentioning

confidence: 99%

Quantum Tunneling of Magnetization and Related Phenomena in Molecular Materials

2003

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Molecules comprising a large number of coupled paramagnetic centers are attracting much interest because they may show properties which are intermediate between those of simple paramagnets and classical bulk magnets and provide unambiguous evidence of quantum size effects in magnets. To date, two cluster families, usually referred to as Mn12 and Fe8, have been used to test theories. However, it is reasonable to predict that other classes of molecules will be discovered which have similar or superior properties. To do this it is necessary that synthetic chemists have a good understanding of the correlation between the structure and properties of the molecules, for this it is necessary that concepts such as quantum tunneling, quantum coherence, quantum oscillations are understood. The goal of this article is to review the fundamental concepts needed to understand quantum size effects in molecular magnets and to critically report what has been done in the field to date.

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Section: Mn12ac and Single‐molecule Magnetsmentioning

confidence: 99%

Quantum Tunneling of Magnetization and Related Phenomena in Molecular Materials

2003

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“…Andere Derivate enthalten Typ‐II‐Ionen, die keine oder zwei Wassermoleküle in ihrer Koordinationssphäre enthalten. Vier unterschiedliche Bauprinzipien wurden experimentell nachgewiesen, entsprechend den Koordinationsschemata 1:1:1:1 (wie in 1 ),21, 125, 143 1:2:1:0,125, 139 1:1:2:0125, 140 und 2:2:0:065, 125, 141, 142 (die Notation gibt die Koordinationszahl von Wasser an den Typ‐II‐Ionen an).…”

Section: Mn12ac Und Einzelmolekülmagneteunclassified

Quantentunneln der Magnetisierung und verwandte Phänomene in molekularen Materialien

2003

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Moleküle mit einer großen Zahl gekoppelter paramagnetischer Zentren werden gegenwärtig intensiv erforscht. Man hofft auf Eigenschaften zu treffen, die zwischen denen isolierter Paramagnete und klassischer Magnete liegen, und damit einen eindeutigen Nachweis für das Auftreten von Größenquantisierungseffekten in Magneten zu erhalten. Als Prüfsteine für neue Theorien dienten bislang die beiden Clusterfamilien Mn12 und Fe8. Man darf jedoch davon ausgehen, dass die Synthesechemie in naher Zukunft weitere Klassen mit ähnlichen oder gar besseren Eigenschaften hervorbringt. Als eine Voraussetzung hierfür müssen die Beziehungen zwischen Struktur und Eigenschaften des Moleküls klar verstanden und Konzepte wie Quantentunneln, Quantenkohärenz oder Quantenoszillation gut bekannt sein. Ziel dieses Aufsatzes ist es, die notwendigen Grundlagen zum Verständnis der Größenquantisierungseffekte zusammenzufassen und einen kritischen Überblick über die Entwicklung dieses jungen Forschungsgebietes zu geben.

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“…Single‐molecule magnets (SMMs) have received considerable attention over the past two decades as their study lies at the interfaces of chemistry, materials, and physics disciplines . Among these are polynuclear complexes derived from cyanometalate anions, whose magnetic anisotropies arise from unquenched orbital angular momentum, a necessary criterion for the creation of an appreciable spin‐reversal energy barrier .…”

Section: Introductionmentioning

confidence: 99%

Structure‐Property Relationships in Tricyanoferrate(III) Building Blocks and Trinuclear Cyanide‐Bridged Complexes

et al. 2016

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International audienceThe preparation, structures, and magnetic properties of two tricyanoferrates, [NEt4]2[(Tp*Me)FeII(CN)3]·MeCN (1) and[NEt4][(Tp*Me)FeIII(CN)3]·H2O (2), and three trinuclear derivatives, {[(Tp*Me)FeIII(CN)3]2[NiII(L)2]}·n(solvent) (L = bpy, 3; tren, 4; DETA,5) are described. Magnetic measurements show that 2 is an S = 1/2 complex [g = 2.65(1)], while 3–5 display ST = 2 spin ground states, owing to cyanide-mediated ferromagnetic exchange between FeIII LS (S = 1/2) and NiII (S = 1) ions...

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Einzelmolekül-Magnete: unterschiedliche Raten des resonanten Tunnelns der Magnetisierung in Mn12-Komplexen

Cited by 9 publications

References 16 publications

Quantum Tunneling of Magnetization and Related Phenomena in Molecular Materials

Quantum Tunneling of Magnetization and Related Phenomena in Molecular Materials

Quantentunneln der Magnetisierung und verwandte Phänomene in molekularen Materialien

Structure‐Property Relationships in Tricyanoferrate(III) Building Blocks and Trinuclear Cyanide‐Bridged Complexes

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