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US 11,192,835 B2Granted
Polyoxometalates comprising noble metals and carboxylate-based capping groups and metal-clusters thereof
AssigneeExxonMobil Chemical Patents Inc.
InventorsTian Ma, Peng Yang, Wassim W. Ayass, Zhengguo Lin, Ulrich Kortz
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Abstract
The invention relates to polyoxometalates represented by the formula (An)m+[M′M12Oy(RCOO)zHq]m− or solvates thereof, corresponding supported polyoxometalates, and processes for their preparation, as well as corresponding metal clusters, optionally in the form of a dispersion in a liquid carrier medium or immobilized on a solid support, and processes for their preparation, as well as their use in reductive conversion of organic substrate.
Claims12
Polyoxometalate represented by the formula
- (An)m+[M′M12Oy(RCOO)z]m−
- or solvates thereof, wherein
- each A independently represents a cation and is selected from the group consisting of tetraalkylammonium, Li, K, Na and combinations thereof,
- n is the number of cations with n ranging from 1 to 45,
- all M are the same and are selected from the group consisting of Pd and Pt, and each M has d8 valence electron configuration,
- M′ is selected from the group consisting of Ga, In, Tl, Sn, and Pb,
- each RCOO is a carboxylate-based group, wherein each R is independently selected from the group consisting of a hydrogen atom and alkyl groups containing 1 to 6 carbon atoms, optionally substituted with F or Cl,
- y is 8,
- z is 16, and
- m is a number representing a total positive charge of n cations A and a corresponding negative charge of polyanion [M′M12Oy(RCOO)z], and m ranges from 1 to 45.
7 more elements
Dependencies are inferred from the claim text.