Optically active polythiophenes
US6878801B2 · kind B2 · utility
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Key dates
| Filing date | Jan 8, 2003 |
| Grant date | Apr 12, 2005 |
| Priority date | — |
| Expiry date | Mar 28, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D333/18
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel polythiophenes which exhibit strong main chain absorption in the ultraviolet to visible region, show optical activity depending on the polymeric chain alone, and comprise as repeating units thiophene rings containing chiral substituent groups, and are represented by the following general formula: (wherein R1 and R2 are the same or different, each representing a hydrogen atom or an organic group, of which at least one is an enantiopure alkyl group with a branch structure at the β-position, and n represents the number of repeating units selected from 10 to 100,000).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.