Manganese oxide helices, rings, strands, and films, and methods for their preparation
US6503476B1 · kind B1 · utility
9Cited by
5References
30Claims
0Family size
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Key dates
| Filing date | Jul 24, 2000 |
| Grant date | Jan 7, 2003 |
| Priority date | — |
| Expiry date | Jul 24, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/40
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Methods for the preparation of mixed-valence manganese oxide compositions with quaternary ammonium ions are described. The compositions self-assemble into helices, rings, and strands without any imposed concentration gradient. These helices, rings, and strands, as well as films having the same composition, undergo rapid ion exchange to replace the quaternary ammonium ions with various metal ions. And the metal-ion-containing manganese oxide compositions so formed can be heat treated to form semi-conducting materials with high surface areas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.