Solid‐State Umbrella‐type Inversion of a VO₅ Square‐Pyramidal Unit in a Bowl‐type Dodecavanadate Induced by Insertion and Elimination of a Guest Molecule

Abstract

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Molecular Vanadium Oxides for Energy Conversion and Energy Storage: Current Trends and Emerging Opportunities

“…In contrast to molybdates and tungstates, which are typically based on [MoO 6 ]/[WO 6 ] octahedra as fundamental building units, POVs show more structural flexibility and feature tetrahedral [VO 4 ], square‐pyramidal [VO 5 ], and octahedral [VO 6 ] coordination modes [21, 27] . However, this coordinative versatility can also facilitate structural rearrangements, which needs to be considered when deploying POVs in energy applications [27, 40–43] . In addition, POVs are often described as being “less stable” than tungstates and molybdates, which is most likely due to a combination of their structural flexibility, complex protonation chemistry, and high redox activity [21, 23, 27] …”

Molekulare Vanadiumoxide für Energiewandlung und Energiespeicherung: Derzeitige Trends und zukünftige Möglichkeiten

“…Im Gegensatz zu Molybdaten und Wolframaten, die typischerweise auf [MoO 6 ]/[WO 6 ]‐Oktaedern aufbauen, zeigen POVs größere strukturelle Flexibilität und besitzen tetraedrische [VO 4 ], quadratisch‐pyramidale [VO 5 ] und oktaedrische [VO 6 ] Koordionationsgeometrien [21, 27] . Diese koordinative Vielfalt kann jedoch auch strukturelle Umlagerungen bedingen, die beim Einsatz von POVs in Energieanwendungen berücksichtigt werden müssen [27, 40–43] . Zudem werden POVs häufig als “weniger stabil” im Vergleich zu Wolframaten und Molybdaten beschrieben, was wohl auf eine Kombination ihrer strukturellen Flexibilität, ihrer komplexen Protonierungschemie und ihrer ausgeprägten Redoxchemie zurückzuführen ist [21, 23, 27] …”

Controlling the structural and adsorption features of polyoxovanadate-based metal–organic clusters by adjustable template effect

“…[7][8][9][10][11][12] As an important group of POM-MOCs, the chemistry of polyoxovanadate-based MOCs (POV-MOCs) has experienced rapid development over the past decades. 8,[13][14][15][16][17][18][19][20][21][22][23][24][25] According to the nature of organic ligands, POV-MOCs can be roughly divided into two sub-categories, namely, polycarboxylate-based POV-MOCs (POV-C-MOCs) [26][27][28][29][30][31][32] and organo-phosphonate/arsonate-based POV-MOCs (POV-P/As-MOCs). 15,33 Both of them possess addenda of variable valent states (V III , V IV , and V V ) accompanied by flexible coordination geometries (square pyramid and octahedron).…”