Nd2K2IrO7 und Sm2K2IrO7: Normaldrucksynthese komplexer Iridium(VI)‐oxide

Mugavero, Samuel J.; Smith, Mark D.; Yoon, Won‐Sub; Loye, Hans‐Conrad zur

doi:10.1002/ange.200804045

Cited by 7 publications

(2 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As is well established in solid-state chemistry, the type of M−X (M = cations, X = anions) coordination polyhedron observed has a close relationship to the oxidation state of the M atom. For the case of iridium, in particular, multiple Ir oxidation states are known in oxoiridates, including +2, +3, +4, +5, +6, +8, and even +9 [43][44][45][46][47][48][49][50] . To the best of our knowledge, an oxoiridate with iridium oxidation state +7 has not previously been reported.…”

Section: Density Functional Theory (Dft) Calculationsmentioning

confidence: 99%

Structural Diversity in Oxoiridates with 1D IrnO3(n+1) Chain Fragments and Flat Bands

Guo

Warden

Cava

2022

Preprint

View full text Add to dashboard Cite

A previously unreported series of hexagonal-perovskite-based Rb-oxoiridates, Rb5Ir2O9, Rb7Ir3O12, and Rb12Ir7O24, have been synthesized and structurally analyzed via N2-protected single-crystal X-ray diffraction (SC-XRD). These materials exhibit different 1D IrnO3(n+1) chain fragments along their c axes. IrO6 Octahedra and RbOx (x = 6, 8, and 10) polyhedra are their basic building blocks. The IrO6 octahedra are linked via face-sharing, forming Ir2O9 dimers, Ir3O12 trimers, and Ir7O24 heptamers. The nonmagnetic RbOx (x = 6, 8, and 10) polyhedra serve as both bridging units and spacers. Temperature-dependent SC-XRD shows all three to display positive thermal expansion and rules out structural transitions from their triangular symmetries down to 100 K. Density functional theory results suggest semiconducting-like behavior for the title compounds. The flatness of the electronic bands and our structural analysis are of potential interest for understanding and designing 1D quantum materials.

show abstract

Section: Density Functional Theory (Dft) Calculationsmentioning

confidence: 99%

Structural Diversity in Oxoiridates with 1D IrnO3(n+1) Chain Fragments and Flat Bands

Guo

Warden

Cava

2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Thus potentially large numbers of metastable oxide phases remain undiscovered, particularly for the 4d and 5d transition elements whose chemistry is less explored than the first‐row elements, and for which the use of mild reaction conditions may allow access to 11. 12 A range of complex ruthenium oxides containing Ca, Sr, or Ba have been reported and are of interest for their diverse and unusual magnetic and electronic properties. For example, Sr 2 RuO 4 is a notable example of a Cu‐free high temperature superconductor,13 whilst SrRuO 3 is both a metallic conductor and ferromagnetic 14.…”

mentioning

confidence: 99%

Conversion of Dihydroartemisinic Acid into Dihydro‐epi‐deoxyarteannuin B

Chen

Hao

2015

Eur J Org Chem

View full text Add to dashboard Cite

Low‐temperature (200 °C) hydrothermal synthesis of the ruthenium oxides Ca1.5Ru2O7, SrRu2O6, and Ba2Ru3O9(OH) is reported. Ca1.5Ru2O7 is a defective pyrochlore containing RuV/VI; SrRu2O6 is a layered RuV oxide with a PbSb2O6 structure, whilst Ba2Ru3O9(OH) has a previously unreported structure type with orthorhombic symmetry solved from synchrotron X‐ray and neutron powder diffraction. SrRu2O6 exhibits unusually high‐temperature magnetic order, with antiferromagnetism persisting to at least 500 K, and refinement using room temperature neutron powder diffraction data provides the magnetic structure. All three ruthenates are metastable and readily collapse to mixtures of other oxides upon heating in air at temperatures around 300–500 °C, suggesting they would be difficult, if not impossible, to isolate under conventional high‐temperature solid‐state synthesis conditions.

show abstract

Auf der Suche nach neuen Materialien: Kristallzucht von quaternären und höherwertigen Oxiden in Flussmitteln

Bugaris

Loye

2012

Angewandte Chemie

Self Cite

View full text Add to dashboard Cite

Dieser Aufsatz behandelt die explorative Kristallzucht in Hochtemperaturlösungen als eine Methode zur Entdeckung von komplexen Oxidmaterialien. Er gibt eine Übersicht über das Verfahren der Kristallzucht in der Schmelze (Flux‐ oder Flussmittelzüchtung) und kann als Leitfaden für die Anwendung dieser Technik dienen. Die am häufigsten eingesetzten Schmelzen werden hinsichtlich ihres Lösungsvermögens für spezifische Elemente diskutiert, und typische Reaktionsbedingungen werden zusammengestellt. Um das Leistungsvermögen der Fluxmethode zu demonstrieren, werden verschiedene kürzlich hergestellte quaternäre und höhere Oxide vorgestellt, die für das Züchten von Oxidkristallen aus spezifischen Elementen geeignet sind.

show abstract

Nd₂K₂IrO₇ und Sm₂K₂IrO₇: Normaldrucksynthese komplexer Iridium(VI)‐oxide

Abstract: Zur Synthese von Übergangsmetalloxiden mit ungewöhnlich hohen Metalloxidationsstufen werden typischerweise Hochdruckmethoden angewendet, [1][2][3][4][5][6][7][8][9] in Ln 2 MIrO 6 (Ln = La, Pr, Nd, Sm, Eu; M = Li, Na), [18,31,33] La 2.5 K 1.5 IrO 7 , [32]

Cited by 7 publications

References 52 publications

Structural Diversity in Oxoiridates with 1D IrnO3(n+1) Chain Fragments and Flat Bands

Structural Diversity in Oxoiridates with 1D IrnO3(n+1) Chain Fragments and Flat Bands

Conversion of Dihydroartemisinic Acid into Dihydro‐epi‐deoxyarteannuin B

Auf der Suche nach neuen Materialien: Kristallzucht von quaternären und höherwertigen Oxiden in Flussmitteln

Contact Info

Product

Resources

About