Organic nonlinear optical material
US5169986A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1990 |
| Grant date | Dec 8, 1992 |
| Priority date | — |
| Expiry date | Oct 19, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D319/18
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention provides an organic nonlinear optical material including a benzylidene-aniline derivative having an electron-donating substituent introduced at the 4-position and an electron-accepting substituent introduced at the 4'-position, by selecting as the conjugated .pi. electronic system a benzylidene-aniline derivative having a large molelcular hyperpolarizability and yet a dipole moment as small as those of benzene derivatives, and introducing a molecular alignment-regulating substituent. The centrosymmetry in the bulk state of the material, for example, in the crystal state, is destroyed and the molecular alignment is regulated to such a bulk structure so that the optical nonlinearity possessed by the molecule is effectively utilized. The material exhibit a large optical nonlinearity never attained by conventional techniques. the intermolecular cohesive force due to the .pi. electron interaction between the molecules in the present invention is larger than that between a benzene derivative. Consequently, the material has, comparatively, a high melting point, a low subliming property, and a low water-absorbing property. In conclusion, a practically invaluable nonli…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.