US 2002/0164498 A1 · Novel compound for red organic electroluminescent elements and devices

Abstract

The present invention discloses a novel compound useful as the material for a red organic EL device. The novel compound is produced by connecting a benzene ring at the positions 2 and 3 of withdrawing group 2,5-dimethyl-4-(2,2-dicyano)pyrane, and connecting a conjugated donating group at position 5. Using this compound, the EL emission is shifted to the red spectral region, and a higher purity in color for red EL elements is obtained. The synthesis of the compound is easy and the product yield is improved compared to the prior art. Moreover, the red organic EL devices fabricated using the compound have properties that conform with existing NTSC standards.

Claims6

Dependent claims

A compound, as shown in the following formula:

8
wherein, R1 and R2 are individually hydrogen, alkyl of from 1 to 20 carbon atoms, aryl, carbocyclic and other heterocyclic system, and R3 and R4 are individually hydrogen, alkyl of from 1 to 10 carbon atoms, and a branched or unbranched 5 or 6 member substituent ring connecting with R1 and R2 respectively;
and R5 is hydrogen, alkyl of from 1 to 10 atoms and a 5 or 6 member carboncyclic and other heterocyclic system connecting with benzenic ring;
but when R3-5 have no substitution groups present, R1 and R2 are hydrogen, alkyl of 2 to 20 carbon atoms, aryl, carbocyclic and other heterocyclic system.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

09/810,244Filed 19 Mar 2001

Published

7 Nov 2002

Term ends

Not estimatedThe source records don’t support an estimate.

Classification13 codes

C09K 11/06
Luminescent materials, e.g. electroluminescent or chemiluminescent: containing organic luminescent materials
C07D 309/34
Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings: having…
C07D 311/04
Ortho- or peri-condensed with carbocyclic rings or ring systems: benzo[b]pyrans, not hydrogenated in the carbocyclic ring
C07D 311/58
Benzo[b]pyrans, not hydrogenated in the carbocyclic ring: other than with oxygen or sulphur atoms in position 2 or 4

Novel compound for red organic electroluminescent elements and devices

Life of this patent

Novel compound for red organic electroluminescent elements and devices

Life of this patent

Abstract

Claims6