Fluorene derivative
US5075487A · kind A · utility
11Cited by
1References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1990 |
| Grant date | Dec 24, 1991 |
| Priority date | — |
| Expiry date | Apr 10, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2603/18
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A fluorene derivative useful as an electron transport material is disclosed, which is represented by formula (I) ##STR1## wherein R.sub.1 represents a hydrogen atom or a phenyl group, R.sub.2 represents a hydrogen atom, a nitro group, or an alkoxycarbonyl group, and R.sub.3 and R.sub.4 each represents a hydrogen atom or an alkyl group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.