NAPHTHALENE DERIVATIVE, MATERIAL FOR ORGANIC ELECTROLUMINESCENCE DEVICE, AND ORGANIC ELECTROLUMINESCENCE DEVICE USING THE SAME

• US 20090008605A1
• Filed: 04/14/2008
• Published: 01/08/2009
• Est. Priority Date: 07/07/2007
• Status: Active Grant

• Current Assignee: Idemitsu Kosan Company Limited
• Original Assignee: Idemitsu Kosan Company Limited
• Inventors: Iwakuma, Toshihiro, Fukuoka, Kenichi, Hosokawa, Chishio, Ito, Mitsunori, Kawamura, Masahiro, Nishimura, Kazuki, Ogiwara, Toshinari, Takashima, Yoriyuki
• Granted Patent: US 8,025,815 B2
• Time in Patent Office: Days
• US Class Current: 252/301.160
• CPC Class Codes: C07C 13/567 with a fluorene or hydrogenated fluorene ring system
• CPC Class Codes: C07C 15/24 containing two rings
• CPC Class Codes: C07C 15/30 Phenanthrenes
• CPC Class Codes: C07D 235/08 Radicals containing only hydrogen and carbon atoms
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 11/565 with zinc cadmium
• CPC Class Codes: C09K 2211/1011 Condensed systems
• CPC Class Codes: H05B 33/14 characterised by the chemical or physical composition or the arrangement of the electroluminescent material , or by the simultaneous addition of the electroluminescent material in or onto the light source
• CPC Class Codes: H05B 33/20 characterised by the chemical or physical composition or the arrangement of the material in which the electroluminescent material is embedded
• CPC Class Codes: H10K 2102/103 comprising indium oxides, e.g. ITO
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 85/342 comprising iridium
• CPC Class Codes: H10K 85/622 containing four rings, e.g. pyrene
• CPC Class Codes: H10K 85/626 containing more than one polycyclic condensed aromatic rings, e.g. bis-anthracene
• CPC Class Codes: H10K 85/633 comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom
• CPC Class Codes: H10K 85/657 Polycyclic condensed heteroaromatic hydrocarbons
• CPC Class Codes: H10K 85/6572 comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole

Abstract

A naphthalene derivative represented by the following formula (1) is provided. In the formula, Ar¹ to Ar⁴ each represent an aromatic hydrocarbon cyclic group having 6 to 18 carbon atoms forming a ring. The aromatic hydrocarbon cyclic group has none of anthracene skeleton, pyrene skeleton, aceanthrylene skeleton and naphthacene skeleton. n, m and 1 each represent an integer in a range of 1 to 5. p represents an integer in a range of o to 5. When n, m, 1 and p each are 2 or more, a plurality of Ar¹ to Ar⁴ may be mutually the same or different.

Claims

1. A naphthalene derivative represented by the following formula (1),

where:

Ar¹ to Ar⁴ each represent an aromatic hydrocarbon cyclic group having 6 to 18 carbon atoms forming a ring, the aromatic hydrocarbon cyclic group having none of anthracene skeleton, pyrene skeleton, aceanthrylene skeleton and naphthacene skeleton;

n, m and l each represent an integer in a range of 1 to 5;

p represents an integer in a range of 0 to 5;

when the naphthalene derivative has a structure in which two naphthalene skeletons are consecutively bonded together, the structure of the naphthalene derivative is represented by any one of formulae (1-A), (1-B), (1-C) and (1-D) as follows;

the naphthalene skeletons represented by the formulae (1-A), (1-B) and (1-C) each are allowed to have a substituent(s) at any suitable position(s) or allowed to be unsubstituted;

R in the formula (1-D) represents a substituent, R being allowed to represent a single substituent or plural substituents, the single or plural substituent(s) being allowed to be in any position(s) of the two naphthalene skeletons;

when R represents plural substituents, the plural substituents are allowed to be mutually the same or different;

when the naphthalene derivative has a structure in which three naphthalene skeletons are consecutively bonded together, a naphthalene skeleton of the three naphthalene skeletons that is positioned at the center of the structure is tetravalent or more while at least either one of the other naphthalene skeletons of the three naphthalene skeletons that are positioned at ends of the structure is trivalent or more;

when the naphthalene derivative has a structure in which four naphthalene skeletons are consecutively bonded together, at least one of the naphthalene skeletons is tetravalent or more;

when the naphthalene derivative contains a plurality of unsubstituted 9-phenanthrenes, the number of the unsubstituted 9-phenanthrenes is 3 or more; and

when Ar¹ to Ar⁴ each represent a phenanthrene skeleton in the naphthalene derivative, the phenanthrene skeleton is monovalent.

2. The naphthalene derivative according to claim 1, wherein Ar¹ to Ar⁴ in the formula (1) each represent a benzene skeleton, a naphthalene skeleton, a fluorene skeleton, a phenanthrene skeleton, a fluoranthene skeleton, a triphenylene skeleton or a chrysene skeleton.

3. The naphthalene derivative according to claim 2, wherein, when Ar¹ to Ar⁴ in the formula (1) each has a substituent, the substituent is selected from a group consisting of an aryl group having 6 to 30 carbon atoms, an alkyl group having 1 to 30 carbon atoms, a cycloalkyl group having 1 to 30 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a cyano group, a silyl group having 3 to 30 carbon atoms and a halogen atom.

4. The naphthalene derivative according to claim 1, wherein n, m and l in the formula (1) each represent an integer in a range of 1 to 3 while p represents an integer in a range of 0 to 3.

5. A material for an organic electroluminescence device, the material comprising the naphthalene derivative according to claim 1.

6. The material for an organic electroluminescence device according to claim 5, the material being used together with a phosphorescent material.

7. The material for an organic electroluminescence device according to claim 5, the material being used as a host material for an emitting layer.

8-14. -14. (canceled)