Platinum complex compound and organic electroluminescence device using the same

Abstract

A compound is represented by the following formula (I): wherein each of Ar 1 and Ar 2 independently represents an aromatic ring or an aromatic heterocyclic ring; each of R 1 , R 2 , R 3 and R 4 independently represents a hydrogen atom or a substituent; each of Z 1 and Z 2 independently represents a carbon atom or a nitrogen atom; each of ring Q 1 containing a carbon atom and Z 1 , and ring Q 2 containing a carbon atom and Z 2 independently represents an aromatic ring or an aromatic heterocyclic ring; and A 1 represents a single bond or a divalent linking group.

1 . A compound represented by the following formula (I): 
     
       
         
         
             
             
         
       
       wherein 
       each of Ar 1  and Ar 2  independently represents an aromatic ring or an aromatic heterocyclic ring; 
       each of R 1 , R 2 , R 3  and R 4  independently represents a hydrogen atom or a substituent; 
       each of Z 1  and Z 2  independently represents a carbon atom or a nitrogen atom; 
       each of ring Q 1  containing a carbon atom and Z 1 , and ring Q 2  containing a carbon atom and Z 2  independently represents an aromatic ring or an aromatic heterocyclic ring; and 
       A 1  represents a single bond or a divalent linking group. 
     
   
   
       2 . The compound as claimed in  claim 1 , wherein
 the formula (I) is represented by the following formula (II):   
     
       
         
         
             
             
         
       
       wherein 
       each of ring Q 5  containing Z 15 , Z 17  and Z 19 , and ring Q 6  containing Z 16 , Z 18  and Z 20  independently represents a 5- or 6-membered aromatic ring or aromatic heterocyclic ring; 
       each of Z 15 , Z 16 , Z 17 , Z 18 , Z 19  and Z 20  independently represents a carbon atom or a nitrogen atom; 
       each of a bond for bonding Z 15  to Z 17 , a bond for bonding Z 15  to Z 19 , a bond for bonding Z 16  to Z 18 , and a bond for bonding Z 16  to Z 20  independently represents a single bond or a double bond, provided that when Z 15  represents a nitrogen atom, each of the bond for bonding Z 15  to Z 17  and the bond for bonding Z 15  to Z 19  represents a single bond, and when Z 16  represents a nitrogen atom, each of the bond for bonding Z 16  to Z 18  and the bond for bonding Z 16  to Z 20  represents a single bond; 
       Z 17 , Z 18 , Z 19  and Z 20  do not have a substituent; 
       each of ring Q 3  containing a carbon atom, Z 11  and Z 13 , and ring Q 4  containing a carbon atom, Z 12  and Z 14  independently represents an aromatic ring or an aromatic heterocyclic ring; 
       each of Z 11 , Z 12 , Z 13  and Z 14  independently represents a carbon atom or a nitrogen atom; 
       each of a bond for bonding Z 11  to the carbon atom coordinating to Pt contained in ring Q 3 , a bond for bonding Z 11  to Z 13 , a bond for bonding Z 12  to the carbon atom coordinating to Pt contained in ring Q 4 , and a bond for bonding Z 12  to Z 14  independently represents a single bond or a double bond, provided that when Z 11  represents a nitrogen atom, each of the bond for bonding Z 11  to the carbon atom coordinating to Pt contained in ring Q 3  and the bond for bonding Z 1  to Z 13  represents a single bond, and when Z 12  represents a nitrogen atom, each of the bond for bonding Z 12  to the carbon atom coordinating to Pt contained in ring Q 4  and the bond for bonding Z 12  to Z 14  represents a single bond; 
       Z 13  and Z 14  do not have a substituent; 
       each of R 11 , R 12 , R 13  and R 14  independently represents a hydrogen atom or a substituent; and 
       A 2  represents a single bond or a divalent linking group. 
     
   
   
       3 . The compound as claimed in  claim 2 , wherein
 the formula (II) is represented by the following formula (III):   
     
       
         
         
             
             
         
       
       wherein 
       each of Z 25  and Z 26  represents a carbon atom; 
       each of Z 27 , Z 28 , Z 29 , Z 30 , Z 31 , Z 32 , Z 33 , Z 34 , Z 35  and Z 36  independently represents a carbon atom or a nitrogen atom; 
       Z 27 , Z 28 , Z 29  and Z 30  do not have a substituent; 
       each of Z 21 , Z 22 , Z 23  and Z 24  independently represents a carbon atom or a nitrogen atom; 
       each of ring Q 7  containing a carbon atom, Z 21  and Z 23  and ring Q 8  containing a carbon atom, Z 22  and Z 24  independently represents an aromatic ring or an aromatic heterocyclic ring; 
       each of a bond for bonding Z 21  to the carbon atom coordinating to Pt contained in ring Q 7 , a bond for bonding Z 21  to Z 23 , a bond for bonding Z 22  to the carbon atom coordinating to Pt contained in ring Q 9 , and a bond for bonding Z 22  to Z 24  independently represents a single bond or a double bond, provided that when Z 21  represents a nitrogen atom, each of the bond for bonding Z 21  to the carbon atom coordinating to Pt contained in ring Q 7  and the bond for bonding Z 21  to Z 23  represents a single bond, and when Z 22  represents a nitrogen atom, each of the bond for bonding Z 22  to the carbon atom coordinating to Pt contained in ring Q 8  and the bond for bonding Z 22  to Z 24  represents a single bond; 
       Z 23  and Z 24  do not have a substituent; 
       each of R 21 , R 22 , R 23  and R 24  independently represents a hydrogen atom or a substituent; and 
       A 3  represents a single bond or a divalent linking group. 
     
   
   
       4 . The compound as claimed in  claim 3 , wherein
 the formula (III) is represented by the following formula (IV):   
     
       
         
         
             
             
         
       
       wherein 
       each of Z 41 , Z 42 , Z 43  and Z 44  independently represents a carbon atom or a nitrogen atom; 
       each of ring Q 9  containing a carbon atom, Z 41  and Z 43  and ring Q 10  containing a carbon atom, Z 42  and Z 44  independently represents an aromatic ring or an aromatic heterocyclic ring; 
       each of a bond for bonding Z 41  to the carbon atom coordinating to Pt contained in ring Q 9 , a bond for bonding Z 41  to Z 43 , a bond for bonding Z 42  to the carbon atom coordinating to Pt contained in ring Q 10 , and a bond for bonding Z 42  to Z 44  independently represents a single bond or a double bond, provided that when Z 41  represents a nitrogen atom, each of the bond for bonding Z 41  to the carbon atom coordinating to Pt contained in ring Q 9  and the bond for bonding Z 41  to Z 43  represents a single bond, and when Z 42  represents a nitrogen atom, each of the bond for bonding Z 42  to the carbon atom coordinating to Pt contained in ring Q 10  and the bond for bonding Z 42  to Z 44  represents a single bond; 
       Z 43  and Z 44  do not have a substituent; 
       each of R 31 , R 32 , R 33 , R 34 , R 35 , R 36 , R 37 , R 38 , R 39  and R 40  independently represents a hydrogen atom or a substituent; and 
       A 4  represents a single bond or a divalent linking group. 
     
   
   
       5 . The compound as claimed in  claim 4 , wherein
 the formula (IV) is represented by the following formula (V):   
     
       
         
         
             
             
         
       
       wherein 
       each of R 41 , R 42 , R 43 , R 44 , R 45 , R 46 , R 47 , R 48 , R 49 , R 50 , R 51 , R 52 , R 53 , R 54 , R 55  and R 56  independently represents a hydrogen atom or a substituent; and 
       A 5  represents a single bond or a divalent linking group. 
     
   
   
       6 . The compound as claimed in  claim 4 , wherein
 the formula (IV) is represented by the following formula (VI):   
     
       
         
         
             
             
         
       
       wherein 
       each of R 61 , R 62 , R 63 , R 64 , R 65 , R 66 , R 67 , R 68 , R 69 , R 70 , R 71 , R 72 , R 73  and R 74  independently represents a hydrogen atom or a substituent; and 
       A 6  represents a single bond or a divalent linking group. 
     
   
   
       7 . The compound as claimed in  claim 2 , wherein
 the formula (II) is represented by the following formula (VII):   
     
       
         
         
             
             
         
       
       wherein 
       each of Z 55 , Z 56 , Z 57 , Z 58 , Z 59 , Z 60 , Z 61  and Z 62  independently represents a carbon atom or a nitrogen atom; 
       Z 55 , Z 56 , Z 61  and Z 62  do not have a substituent; 
       each of Z 51 , Z 52 , Z 53  and Z 54  independently represents a carbon atom or a nitrogen atom, 
       each of ring Q 11  containing a carbon atom, Z 51  and Z 53  and ring Q 12  containing a carbon atom, Z 52  and Z 54  independently represents an aromatic ring or an aromatic heterocyclic ring, 
       each of a bond for bonding Z 51  to the carbon atom coordinating to Pt contained in ring Q 11 , a bond for bonding Z 51  to Z 53 , a bond for bonding Z 52  to the carbon atom coordinating to Pt contained in ring Q 12 , and a bond for bonding Z 52  to Z 54  independently represents a single bond or a double bond, provided that when Z 51  represents a nitrogen atom, each of the bond for bonding Z 51  to the carbon atom coordinating to Pt contained in ring Q 11  and the bond for bonding Z 51  to Z 53  represents a single bond, and when Z 52  represents a nitrogen atom, each of the bond for bonding Z 52  to the carbon atom coordinating to Pt contained in ring Q 12  and the bond for bonding Z 52  to Z 54  represents a single bond; and 
       Z 53  and Z 54  do not have a substituent; 
       each of R 111 , R 112 , R 113  and R 114  independently represents a hydrogen atom or a substituent; and 
       A 7  represents a single bond or a divalent linking group. 
     
   
   
       8 . The compound as claimed in  claim 7 , wherein
 the formula (VII) is represented by the following formula (VIII):   
     
       
         
         
             
             
         
       
       wherein 
       each of Z 71 , Z 72 , Z 73  and Z 74  independently represents a carbon atom or a nitrogen atom; 
       each of ring Q 13  containing a carbon atom, Z 71  and Z 73  and ring Q 14  containing a carbon atom, Z 72  and Z 74  independently represents an aromatic ring or an aromatic heterocyclic ring; 
       each of a bond for bonding Z 71  to the carbon atom coordinating to Pt contained in ring Q 13 , a bond for bonding Z 71  to Z 73 , a bond for bonding Z 72  to the carbon atom coordinating to Pt contained in ring Q 14 , and a bond for bonding Z 72  to Z 74  independently represents a single bond or a double bond, provided that when Z 71  represents a nitrogen atom, each of the bond for bonding Z 71  to the carbon atom coordinating to Pt contained in ring Q 13  and the bond for bonding Z 71  to Z 73  represents a single bond, and when Z 72  represents a nitrogen atom, each of the bond for bonding Z 72  to the carbon atom coordinating to Pt contained in ring Q 14  and the bond for bonding Z 72  to Z 74  represents a single bond; 
       Z 73  and Z 74  do not have a substituent; 
       each of R 121 , R 122 , R 123 , R 124 , R 125 , R 126 , R 127  and R 128  independently represents a hydrogen atom or a substituent; and 
       A 8  represents a single bond or a divalent linking group. 
     
   
   
       9 . The compound as claimed in  claim 8 , wherein
 the formula (VII) is represented by the following formula (IX):   
     
       
         
         
             
             
         
       
       wherein 
       each of R 131 , R 132 , R 133 , R 134 , R 135 , R 136 , R 137 , R 138 , R 139 , R 140 , R 141p  R 142 , R 143  and R 144  independently represents a hydrogen atom or a substituent; and 
       A 9  represents a single bond or a divalent linking group. 
     
   
   
       10 . The compound as claimed in  claim 8 , wherein
 the formula (VIII) is represented by the following formula (X):   
     
       
         
         
             
             
         
       
       wherein 
       each of R 151 , R 152 , R 153 , R 154 , R 155 , R 156 , R 157 , R 158 , R 161 , R 162 , R 163  and R 164  independently represents a hydrogen atom or a substituent; and 
       A 10  represents a single bond or a divalent linking group. 
     
   
   
       11 . An organic electroluminescence device comprising:
 a pair of electrodes; and   an organic layer between the pair of electrodes,   wherein the organic layer contains the compound as claimed in  claim 1 .   
   
   
       12 . An organic electroluminescence device comprising:
 a pair of electrodes, and   a light-emitting layer between the pair of electrodes,   wherein the light-emitting layer contains the compound as claimed in  claim 1  in a proportion of from 20 to 30 wt % of the total mass of the light-emitting layer.