Photochromic and electrochromic compounds and synthesis and use thereof
US8536205B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2006 |
| Grant date | Sep 17, 2013 |
| Priority date | — |
| Expiry date | Jan 18, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/142222
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Photochromic and electrochromic hexadiene compounds that are reversibly convertible between ring-open and ring-closed isomeric forms. The conversion between the different isomeric forms may be induced by light or electricity. The compounds may include a charge transfer moiety including electron donor and acceptor groups. The electron donor and acceptor are linearly conjugated in the ring-open form to enable electron transfer but are electrically insulated in the ring-closed form. Photoresponsive compounds may be synthesized by any of several methods disclosed, e.g., by reacting diene precursors with dienophiles in a condensation reaction. The compounds may be utilized in reactivity-gated photochromic or electrochromic applications. Compounds may be used in a method to selectively release a releasable agent, such as a small molecule.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.