Polyoxometalates and Other Metal-Oxo Clusters in Nature

Nyman, May

doi:10.1007/978-3-319-39193-9_43-1

Cited by 2 publications

(2 citation statements)

References 28 publications

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“…In nature, they govern the dissolution, migration, and deposition process of minerals, and they're often appealing in the study of contaminate transportation. 1 The well-established structure of polynuclear metal-oxo clusters provides a great platform for studying the dissolution of minerals computationally. 2 In the lab, metal-oxo clusters containing aqueous solution are used in the deposition of high-quality oxide thin films.…”

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confidence: 99%

Polynuclear Clusters: Bridging between Metal Ion and Metal Oxide

Wang

2016

Chem

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confidence: 99%

Polynuclear Clusters: Bridging between Metal Ion and Metal Oxide

Wang

2016

Chem

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“…The metal oxo Keggin clusters containing aluminum, iron and others have also been found in natural systems and believe to control different geochemical processes. [15][16][17] Keggin isomers can also undergo additional hydrolysis reactions or coordination with linkers that result in the formation of larger (>1 nm) oligomers. For the anionic POMs, formation of lacunary structures based upon the αand β-Keggin motif results in the formation of these larger clusters, with the Wells-Dawson topology as a well-known example.…”

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confidence: 99%

Formation of the [Ge4O16Al48(OH)108(H2O)24]20+ Tetramer from Condensation of ε-GeAl12 Keggin Polycations

Shohel¹,

Bjorklund²,

Smith³

et al. 2020

Preprint

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Keggin-type polyaluminum cations belong to a unique class of polyoxometalates (POMs) with their large positive charge, hydroxo bridges, and divergent isomerization/oligomerization. Previously reported oligomerizations of the polyaluminum cations were driven solely by the δ-Keggin isomer, which created Al26, Al30, and Al32 dimeric species. We herein report the isolation of largest ever Keggin-type structure for this system through a unique mode of self-condensation among<a> four ε-GeAl128+</a> to form [NaGe4O16Al48(OH)108(H2O)24]21+(Ge4Al48). Elemental analysis confirms the Ge4+ substitution, and dynamic light scattering experiments indicated that these larger species exist in the thermally aged solutions. DFT calculations have revealed that a single atom Ge substitution in tetrahedral site of ε-Al137+ is the key for the formation this cluster because it activates the deprotonation at certain octahedral sites to assist self-condensation in a specific mode.

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Polyoxometalates and Other Metal-Oxo Clusters in Nature

Cited by 2 publications

References 28 publications

Polynuclear Clusters: Bridging between Metal Ion and Metal Oxide

Polynuclear Clusters: Bridging between Metal Ion and Metal Oxide

Formation of the [Ge4O16Al48(OH)108(H2O)24]20+ Tetramer from Condensation of ε-GeAl12 Keggin Polycations

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