Biscarbazole derivative, material for organic electroluminescence device and organic electroluminescence device using the same

Abstract

A biscarbazole derivative of the invention is represented by a formula (1) below. In the formula (1): A 1 represents a substituted or unsubstituted nitrogen-containing heterocyclic group having 1 to 30 ring carbon atoms; A 2 represents a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms, or substituted or unsubstituted nitrogen-containing heterocyclic group having 1 to 30 ring carbon atoms; X 1 and X 2 each are a linking group; Y 1 to Y 4 each represent a substituent; p and q represent an integer of 1 to 4; and r and s represent an integer of 1 to 3.

1 - 27 . (canceled) 
     
     
         28 . A compound represented by a formula (1) below: 
       
         
           
           
               
               
           
         
         wherein A 1  and A 2  each mutually independently represent a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted nitrogen-containing heterocyclic group having 1 to 30 ring carbon atoms, 
         X 1  and X 2  are each a linking group and independently represent a single bond, a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms, a substituted or unsubstituted fused aromatic hydrocarbon group having 10 to 30 ring carbon atoms, a substituted or unsubstituted aromatic heterocyclic group having 2 to 30 ring carbon atoms, or a substituted or unsubstituted fused aromatic heterocyclic group having 2 to 30 ring carbon atoms, 
         Y 1 , Y 2 , Y 3  and Y 4  each independently represent a hydrogen atom, a fluorine atom, a cyano group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted haloalkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted alkylsilyl group having 1 to 10 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 30 carbon atoms, a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms, a substituted or unsubstituted fused aromatic hydrocarbon group having 10 to 30 ring carbon atoms, a substituted or unsubstituted aromatic heterocyclic group having 2 to 30 ring carbon atoms; or a substituted or unsubstituted fused aromatic heterocyclic group having 2 to 30 ring carbon atoms, 
         p and q represent 0 or 2, p and q being not simultaneously 0; 
         r and s represent an integer of 1 to 3, 
         when p=2, a plurality of Y 1  may be mutually the same or different, 
         when q=2, a plurality of Y 2  may be mutually the same or different, 
         when r=2 or 3, a plurality of Y 3  may be mutually the same or different, 
         when s=2 or 3, a plurality of Y 4  may be mutually the same or different, when p is 2, a single pair of adjacent ones of Y 1  are mutually bonded to form a ring structure, and 
         when q is 2, a single pair of adjacent ones of Y 2  are mutually bonded to form a ring structure. 
       
     
     
         29 . The compound according to  claim 28 , wherein the ring structure formed by the mutually bonded adjacent ones of Y 1  when p is 2, and the ring structure formed by the mutually bonded adjacent ones of Y 2  when q is 2 are represented by any one of formulae (1a), (1b) and (1c) below. 
       
         
           
           
               
               
           
         
       
     
     
         30 . The compound according to  claim 29 , wherein the compound is represented by a formula (1-A), (1-B), (1-C), (1-D), (1-E) or (1-F). 
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
         31 . The compound according to  claim 30 , wherein A 1  is a substituted or unsubstituted nitrogen-containing compound having 1 to 30 ring carbon atoms. 
     
     
         32 . The compound according to  claim 28 , wherein one of A 1  and A 2  is a substituted or unsubstituted pyridine ring, a substituted or unsubstituted pyrimidine ring, a substituted or unsubstituted triazine ring, or a substituted or unsubstituted quinazoline ring. 
     
     
         33 . An organic-EL-device material comprising the compound according to  claim 28 . 
     
     
         34 . An organic electroluminescence device, comprising:
 a cathode;   an anode; and   a plurality of organic thin-film layers comprising an emitting layer, at least one layer of the organic thin-film layers comprising the organic-EL-device material according to  claim 33 .   
     
     
         35 . The organic electroluminescence device according to  claim 34 , wherein the emitting layer comprises the organic-EL-device material as a host material. 
     
     
         36 . The organic electroluminescence device according to  claim 34 , wherein the emitting layer comprises a phosphorescent material. 
     
     
         37 . The organic electroluminescence device according to  claim 34 , wherein the phosphorescent material is an ortho-metalated complex of a metal atom selected from iridium (Ir), osmium (Os) and platinum (Pt).