Organic compounds -- part of the class 532-570 series – Organic compounds – Nitriles
Reexamination Certificate
2003-03-19
2004-08-10
Vollano, Jean F. (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Nitriles
C570S129000, C568S936000
Reexamination Certificate
active
06774257
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a bis(aminostyryl)naphthalene compound, a synthesis intermediate thereof, and a process for production thereof, the naphthalene compound being suitable for use as an organic luminescent material which emits light of desired color.
Organic electroluminescent elements (EL elements) nowadays are attracting attention as a component suitable for flat panel displays emitting light spontaneously, responding at high seeds, and being independent of viewing angles. This has aroused attention to organic luminescent materials as a constituent of EL elements. One advantage of organic luminescent materials is that they have desired optical properties according to their molecular design. Therefore, it is possible to produce luminescent materials emitting any of three primary colors (red, blue, and green). Combination of these luminescent materials will realize full-color organic electroluminescent elements.
A bis(aminostyryl)benzene compound represented by the general formula [A] below emits intense light of color from blue to red in the visible region depending on substituents introduced therein. Therefore, it will find use in various applications, not limited to use as a material for organic electroluminescent elements. It is capable of sublimation and hence it offers the advantage of forming a uniform amorphous film by vacuum deposition. At present, it is possible to predict to some extent the optical properties of a material by means of molecular orbital calculations. However, it is most important to develop a process for efficient production of a material necessary for practical use.
General formula [A]
(where Ar denotes an aryl group which may has a substituents, and R
a
and R
b
may be identical or different, each denoting a hydrogen atom, saturated or unsaturated hydrocarbon group, aryl group which may have a substituent, cyano group, halogen atom, nitro group, trifluoromethyl group, amino group, or alkoxyl group.)
A large number of compounds represented by the general formula [A] have been produced so far as the organic luminescent material. Most of them emit light of blue to green, and a few of them emitting yellow to red light have been reported. [Institute of Electric Information and Communication, Report on Technical Researches, Organic Electronics, 17, 7 (1992); Inorganic and Organic Electroluminescence 96 Berlin, 101 (1996); etc.] Any process for their efficient production has never been established.
SUMMARY OF THE INVENTION
The present invention was completed in view of the foregoing. It is an object of the present invention to provide a compound which is suitable as an organic luminescent material to emit intense light of yellow to red colors, a synthesis intermediate thereof, and a process for efficient production thereof.
REFERENCES:
patent: 3627758 (1971-12-01), Weber et al.
patent: 4065432 (1977-12-01), Frazer
CA:56:18209 abs of Journal of Amer. Chem. Soc. abstracts by Golden J.H. pp 3471-8 1961.
Ichimura Mari
Ishibashi Tadashi
Tamura Shinichiro
Sonnenschein Nath & Rosenthal LLP
Sony Corporation
Vollano Jean F.
LandOfFree
Bis (aminostyryl) naphthalene compound, synthesis... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bis (aminostyryl) naphthalene compound, synthesis..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bis (aminostyryl) naphthalene compound, synthesis... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3353328