Light-emitting material with a polycyclic ligand
Provided is a luminescent material having a polycyclic ligand. The luminescent material is a new metal complex having a polycyclic ligand and may be used as luminescent materials in electroluminescent devices. These new metal complexes achieve red light emission, have a very narrow full width at half maximum, and can achieve high saturation luminescence. In addition, these new metal complexes, when used as luminescent materials in electroluminescent devices, can achieve red light emission, have a very narrow full width at half maximum, achieve high saturation luminescence, reduce or maintain a low voltage, greatly improve device efficiency and lifetime, and provide better device performance. Further provided are an electroluminescent device and a compound composition.
1 . A metal complex, having a general formula of M(L a ) m (L b ) n (L c ) q ; wherein the metal M is selected from metals having a relative atomic mass greater than 40, L a , L b and L c are a first ligand, a second ligand and a third ligand coordinated to the metal M, respectively; m is selected from 1, 2 or 3, n is selected from 0, 1 or 2, q is selected from 0, 1 or 2, and m+n+q is equal to an oxidation state of the metal M; when m is equal to 2 or 3, a plurality of L a can be identical or different; when n is equal to 2, two L b can be identical or different; and when q is equal to 2, two L c can be identical or different; and L a has a structure represented by Formula 1:
wherein,
Z 1 and Z 2 are each independently selected from C or N, and Z 1 and Z 2 are different;
W is, at each occurrence identically or differently, selected from B, N or P;
ring A, and ring C are, at each occurrence identically or differently, selected from a five-membered unsaturated carbocyclic ring, an aromatic ring having 6 to 30 carbon atoms or a heteroaromatic ring having 3 to 30 carbon atoms;
ring D is selected from a benzene ring, a naphthalene ring, an aza-naphthalene ring, a pyridine ring or a pyrimidine ring;
ring B is selected from a heterocyclic ring having 2 to 30 carbon atoms or a heteroaromatic ring having 2 to 30 carbon atoms;
R a , R b , R c , and R d represent, at each occurrence identically or differently, mono-substitution, multiple substitutions or non-substitution;
R a , R b , R c , and R d are, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted alkynyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
adjacent substituents R a , R b , R c , and R d can be optionally joined to form a ring;
L a , L b , and L c can be optionally joined to form a multi-dentate ligand;
L b and L c are, at each occurrence identically or differently, selected from the group consisting of the following structures:
wherein,
R i , R ii , and R iii represent, at each occurrence identically or differently, mono-substitution, multiple substitutions or non-substitution;
X a is, at each occurrence identically or differently, selected from the group consisting of: O, S, Se, NR N1 , and CR C1 R C2 ;
X b and X c are, at each occurrence identically or differently, selected from the group consisting of: O, S, Se, and NR N2 ;
R i , R ii , R iii , R N1 , R N2 , R C1 , and R C2 are, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted alkynyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
adjacent substituents R i , R ii , R iii , R N1 , R N2 , R C1 , and R C2 can be optionally joined to form a ring.
2 . The metal complex of claim 1 , wherein in the L a , ring A, and ring C are, at each occurrence identically or differently, selected from an aromatic ring having 6 to 18 carbon atoms or a heteroaromatic ring having 3 to 18 carbon atoms; and ring B is selected form a heteroaromatic ring having 2 to 18 carbon atoms.
3 . The metal complex of claim 1 , wherein the L a is selected from a structure represented by any one of Formula 2 to Formula 18:
wherein,
Z 1 and Z 2 are each independently selected from C or N, and Z 1 and Z 2 are different;
W is, at each occurrence identically or differently, selected from B, N or P;
A 1 to As are, at each occurrence identically or differently, selected from N or CR a ;
B 1 to B 4 are, at each occurrence identically or differently, selected from N or CR b ;
C 1 to C 4 are, at each occurrence identically or differently, selected from N or CR c ;
in Formula 2 to Formula 9, and Formula 13 to Formula 18, D 1 is selected from CR d , D 2 is selected from N or CR a ; in Formula 10 to Formula 12, D 1 to D 4 are, at each occurrence identically or differently, selected from N or CR d ;
X 1 is, at each occurrence identically or differently, selected from O, S, Se, NR c , CR c R c , SiR c R c or PR c ;
Z 3 is, at each occurrence identically or differently, selected from O, S, Se, NR z , CR z R z , SiR z R z or PR z ;
R a , R b , R c , R a , and Rz are, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted alkynyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
adjacent substituents R a , R b , R c , Rd, and Rz can be optionally joined to form a ring.
4 . The metal complex of claim 3 , wherein in Formula 1 to Formula 18, Z 1 is N, and Z 2 is C.
5 . The metal complex of claim 3 , wherein in Formula 1 to Formula 18, W is N.
6 . The metal complex of claim 3 , wherein in Formula 2 to Formula 9, Formula 13 to Formula 18, Z 1 is N, and D 2 is N; in Formula 10 to Formula 12, Z 1 is N, and at least one of D 1 and D 2 is N; or in Formula 2 to Formula 17, Z 2 is N, and at least one of C 1 and C 2 is N.
7 . The metal complex of claim 3 , wherein in Formula 2 to Formula 18, A 1 to As are each independently selected from CR a , and B 1 to B 4 are each independently selected from CR b ; in Formula 2 to Formula 17, C 1 to C 4 are each independently selected from CR c ; in Formula 2 to Formula 18, D 1 to D 4 are each independently selected from CR a ; and the R a , R b , R c , and R d are, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted alkynyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
adjacent substituents R a , R b , R c , and R d can be optionally joined to form a ring.
8 . The metal complex of claim 3 , wherein in Formula 2 to Formula 18, at least one of A 1 to An is, at each occurrence identically or differently, selected from CR a , and the An corresponds to one having the largest serial number of A 1 to As in any one of Formula 2 to Formula 18; and the at least one R a is, at each occurrence identically or differently, selected from the group consisting of: deuterium, halogen, a cyano group, a hydroxyl group, a sulfanyl group, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, and combinations thereof;
adjacent substituents R a can be optionally joined to form a ring.
9 . The metal complex of claim 8 , wherein in Formula 2 to Formula 14 and Formula 18, at least one of A 1 to A 3 is, at each occurrence identically or differently, selected from CR a .
10 . The metal complex of claim 3 , wherein in Formula 2 to Formula 17, C 2 is selected from CR c , and the R c is selected from the group consisting of: deuterium, halogen, a cyano group, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, and combinations thereof.
11 . The metal complex of claim 3 , wherein in Formula 2 to Formula 18, at least one of B 1 to B n is selected from CR b , and the B n corresponds to one having the largest serial number of B 1 to B 4 in any one of Formula 2 to Formula 18; and/or in Formula 2 to Formula 18, at least one of D 1 to D n is selected from CR a , and the D n corresponds to one having the largest serial number of D 1 to D 4 in any one of Formula 2 to Formula 18; and the R b and R a are, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, a cyano group, a hydroxyl group, a sulfanyl group, and combinations thereof.
12 . The metal complex of claim 11 , wherein in Formula 2 to Formula 12, Formula 16 and Formula 18, B 2 and/or B 3 are selected from CR b ; in Formula 13 to Formula 15 and Formula 17, B 1 and/or B 2 are selected from CR b ; and in Formula 2 to Formula 18, D 1 and/or D 2 are selected from CR d .
13 . The metal complex of claim 3 , wherein L a is selected from a structure represented by Formula 2, Formula 3, Formula 7, Formula 8, Formula 9 or Formula 12.
14 . The metal complex of claim 3 , wherein in Formula 2 to Formula 18, Z 1 is C, and Z 2 is N.
15 . The metal complex of claim 3 , wherein in Formula 2 to Formula 18, A 1 to As are each independently selected from CR a , and B 1 to B 4 are each independently selected from CR b ; in Formula 2 to Formula 17, C 1 to C 4 are each independently selected from CR c ; in Formula 2 to Formula 18, D 1 to D 4 are each independently selected from CR d ; and the R a , R b , R c , and R d are, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, a cyano group, and combinations thereof.
16 . The metal complex of claim 1 , wherein L a is, at each occurrence identically or differently, selected from the group consisting of the following structures:
wherein TMS represents trimethylsilyl, and Ph represents phenyl;
wherein, optionally, hydrogen in the structures L a1 to L a956 , L a985 to L a1009 , L a1020 to L a1074 , L a1097 to L a1100 , L a1105 to L a1342 can be partially or completely substituted with deuterium.
17 . The metal complex of claim 1 , having a general formula of M(L a ) m (L b ) n (L c ) q ;
wherein the metal M is selected from Ir, Rh, Re, Os, Pt, Au or Cu L a , L b and L c are a first ligand, a second ligand and a third ligand coordinated to the metal M, respectively; m is selected from 1, 2 or 3, n is selected from 0, 1 or 2, q is selected from 0, 1 or 2, and m+n+q is equal to an oxidation state of the metal M; when m is equal to 2 or 3, a plurality of L a can be identical or different; when n is equal to 2, two L b can be identical or different; and when q is equal to 2, two L c can be identical or different;
L a , L b , and L c can be optionally joined to form a multi-dentate ligand;
L b and L c are, at each occurrence identically or differently, selected from the group consisting of the following structures:
wherein,
R i , R ii represent, at each occurrence identically or differently, mono-substitution, multiple substitutions or non-substitution;
X b and X c are, at each occurrence identically or differently, selected from the group consisting of: O, S, Se, and NR N2 ;
R i , R ii , R iii , R N2 are, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted alkynyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
adjacent substituents R i , R ii , R iii , R N2 can be optionally joined to form a ring.
18 . The metal complex of claim 17 , wherein L b is, at each occurrence identically or differently, selected from the following structure:
wherein R 1 to R 7 are, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted alkynyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof.
19 . The metal complex of claim 18 , wherein at least one or two of R 1 to R 3 are selected from substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms or combinations thereof; and/or at least one or two of R 4 to R 6 are selected from substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms or combinations thereof.
20 . The metal complex of claim 16 , wherein L b is, at each occurrence identically or differently, selected from the group consisting of the following structures:
wherein, L c is, at each occurrence identically or differently, selected from the group consisting of the following structures:
21 . The metal complex of claim 20 , wherein the metal complex is an Ir complex and has a structure represented by any one of Ir(L a )(L b )(L c ), Ir(L a ) 2 (L b ), Ir(L a ) 2 (L c ) and Ir(L a )(L c ) 2 ; when the metal complex has a structure of Ir(L a )(L b )(L c ), L a is selected from any one of the group consisting of L a1 to L a956 , L a985 to L a1009 , L a1020 to L a1074 , L a1097 to L a1100 , L a1105 to L a1342 , L b is selected from any one of the group consisting of L b1 to L b322 , and L c is selected from any one of the group consisting of L C1 to L c231 ; when the metal complex has a structure of Ir(L a ) 2 (L b ), L a is, at each occurrence identically or differently, selected from any one or any two of the group consisting of L a1 to L a956 , L a985 to L a1009 , L a1020 to L a1074 , L a1097 to L a1100 , L a1105 to L a1342 , and L b is selected from any one of the group consisting of L b1 to L b322 ; when the metal complex has a structure of Ir(L a ) 2 (L c ), L a is, at each occurrence identically or differently, selected from any one or any two of the group consisting of L a1 to L a956 , L a985 to L a1009 , L a1020 to L a1074 , L a1097 to L a1100 , L a1105 to L a1342 , and L c is selected from any one of the group consisting of L c1 to L c231 ; and when the metal complex has a structure of Ir(L a )(L c ) 2 , L a is selected from any one of the group consisting of L a1 to L a956 , L a985 to L a1009 , L a1020 to L a1074 , L a1097 to L a1100 , L a1105 to L a1342 , and L c is, at each occurrence identically or differently, selected from any one or any two of the group consisting of L c1 to L c231 .
22 . The metal complex of claim 20 , wherein the metal complex is selected from the group consisting of Compound 1 to Compound 530, and Compound 1 to Compound 530 have a general formula of Ir(L a ) 2 (L b ), wherein two L a are identical and L a and L b are respectively selected from structures listed in the following table:
Compound
No.
L a
L b
1
L a27
L b31
2
L a27
L b57
3
L a28
L b31
4
L a28
L b57
5
L a29
L b31
6
L a29
L b57
7
L a30
L b31
8
L a30
L b57
9
L a33
L b31
10
L a33
L b57
11
L a35
L b31
12
L a35
L b57
13
L a37
L b31
14
L a37
L b57
15
L a41
L b31
16
L a41
L b57
17
L a43
L b31
18
L a43
L b57
19
L a27
L b66
20
L a27
L b88
21
L a28
L b66
22
L a28
L b88
23
L a29
L b66
24
L a29
L b88
25
L a30
L b66
26
L a30
L b88
27
L a33
L b66
28
L a33
L b88
29
L a35
L b66
30
L a35
L b88
31
L a37
L b66
32
L a37
L b88
33
L a41
L b66
34
L a41
L b88
35
L a43
L b66
36
L a43
L b88
37
L a27
L b90
38
L a27
L b122
39
L a28
L b90
40
L a28
L b122
41
L a29
L b90
42
L a29
L b122
43
L a30
L b90
44
L a30
L b122
45
L a33
L b90
46
L a33
L b122
47
L a35
L b90
48
L a35
L b122
49
L a37
L b90
50
L a37
L b122
51
L a41
L b90
52
L a41
L b122
53
L a43
L b90
54
L a43
L b122
55
L a27
L b126
56
L a27
L b139
57
L a28
L b126
58
L a28
L b139
59
L a29
L b126
60
L a29
L b139
61
L a30
L b126
62
L a30
L b139
63
L a33
L b126
64
L a33
L b139
65
L a35
L b126
66
L a35
L b139
67
L a37
L b126
68
L a37
L b139
69
L a41
L b126
70
L a41
L b139
71
L a43
L b126
72
L a43
L b139
73
L a27
L b245
74
L a35
L b245
75
L a28
L b245
76
L a37
L b245
77
L a29
L b245
78
L a41
L b245
79
L a30
L b245
80
L a43
L b245
81
L a33
L b245
82
L a44
L b245
83
L a51
L b31
84
L a51
L b57
85
L a56
L b31
86
L a56
L b57
87
L a58
L b31
88
L a58
L b57
89
L a74
L b31
90
L a74
L b57
91
L a79
L b31
92
L a79
L b57
93
L a81
L b31
94
L a81
L b57
95
L a97
L b31
96
L a97
L b57
97
L a102
L b31
98
L a102
L b57
99
L a104
L b31
100
L a104
L b57
101
L a120
L b31
102
L a120
L b57
103
L a125
L b31
104
L a125
L b57
105
L a212
L b31
106
L a212
L b57
107
L a214
L b31
108
L a214
L b57
109
L a217
L b31
110
L a217
L b57
111
L a219
L b31
112
L a219
L b57
113
L a226
L b31
114
L a226
L b57
115
L a304
L b31
116
L a304
L b57
117
L a306
L b31
118
L a306
L b57
119
L a309
L b31
120
L a309
L b57
121
L a311
L b31
122
L a311
L b57
123
L a321
L b31
124
L a321
L b57
125
L a323
L b31
126
L a323
L b57
127
L a332
L b31
128
L a332
L b57
129
L a351
L b31
130
L a351
L b57
131
L a356
L b31
132
L a356
L b57
133
L a375
L b31
134
L a375
L b57
135
L a422
L b31
136
L a422
L b57
137
L a427
L b31
138
L a427
L b57
139
L a450
L b31
140
L a450
L b57
141
L a473
L b31
142
L a473
L b57
143
L a496
L b31
144
L a496
L b57
145
L a606
L b31
146
L a606
L b57
147
L a611
L b31
148
L a611
L b57
149
L a634
L b31
150
L a634
L b57
151
L a899
L b31
152
L a899
L b57
153
L a923
L b31
154
L a923
L b57
155
L a51
L b66
156
L a51
L b88
157
L a56
L b66
158
L a56
L b88
159
L a58
L b66
160
L a58
L b88
161
L a74
L b66
162
L a74
L b88
163
L a79
L b66
164
L a79
L b88
165
L a81
L b66
166
L a81
L b88
167
L a97
L b66
168
L a97
L b88
169
L a102
L b66
170
L a102
L b88
171
L a104
L b66
172
L a104
L b88
173
L a120
L b66
174
L a120
L b88
175
L a125
L b66
176
L a125
L b88
177
L a212
L b66
178
L a212
L b88
179
L a214
L b66
180
L a214
L b88
181
L a217
L b66
182
L a217
L b88
183
L a219
L b66
184
L a219
L b88
185
L a226
L b66
186
L a226
L b88
187
L a304
L b66
188
L a304
L b88
189
L a306
L b66
190
L a306
L b88
191
L a309
L b66
192
L a309
L b88
193
L a311
L b66
194
L a311
L b88
195
L a321
L b66
196
L a321
L b88
197
L a323
L b66
198
L a323
L b88
199
L a332
L b66
200
L a332
L b88
201
L a351
L b66
202
L a351
L b88
203
L a356
L b66
204
L a356
L b88
205
L a375
L b66
206
L a375
L b88
207
L a422
L b66
208
L a422
L b88
209
L a427
L b66
210
L a427
L b88
211
L a450
L b66
212
L a450
L b88
213
L a473
L b66
214
L a473
L b88
215
L a496
L b66
216
L a496
L b88
217
L a606
L b66
218
L a606
L b88
219
L a611
L b66
220
L a611
L b88
221
L a634
L b66
222
L a634
L b88
223
L a899
L b66
224
L a899
L b88
225
L a923
L b66
226
L a923
L b88
227
L a51
L b90
228
L a51
L b122
229
L a56
L b90
230
L a56
L b122
231
L a58
L b90
232
L a58
L b122
233
L a74
L b90
234
L a74
L b122
235
L a79
L b90
236
L a79
L b122
237
L a81
L b90
238
L a81
L b122
239
L a97
L b90
240
L a97
L b122
241
L a102
L b90
242
L a102
L b122
243
L a104
L b90
244
L a104
L b122
245
L a120
L b90
246
L a120
L b122
247
L a125
L b90
248
L a125
L b122
249
L a212
L b90
250
L a212
L b122
251
L a214
L b90
252
L a214
L b122
253
L a217
L b90
254
L a217
L b122
255
L a219
L b90
256
L a219
L b122
257
L a226
L b90
258
L a226
L b122
259
L a304
L b90
260
L a304
L b122
261
L a306
L b90
262
L a306
L b122
263
L a309
L b90
264
L a309
L b122
265
L a311
L b90
266
L a311
L b122
267
L a321
L b90
268
L a321
L b122
269
L a323
L b90
270
L a323
L b122
271
L a332
L b90
272
L a332
L b122
273
L a351
L b90
274
L a351
L b122
275
L a356
L b90
276
L a356
L b122
277
L a375
L b90
278
L a375
L b122
279
L a422
L b90
280
L a422
L b122
281
L a427
L b90
282
L a427
L b122
283
L a450
L b90
284
L a450
L b122
285
L a473
L b90
286
L a473
L b122
287
L a496
L b90
288
L a496
L b122
289
L a606
L b90
290
L a606
L b122
291
L a611
L b90
292
L a611
L b122
293
L a634
L b90
294
L a634
L b122
295
L a899
L b90
296
L a899
L b122
297
L a923
L b90
298
L a923
L b122
299
L a51
L b126
300
L a51
L b139
301
L a56
L b126
302
L a56
L b139
303
L a58
L b126
304
L a58
L b139
305
L a74
L b126
306
L a74
L b139
307
L a79
L b126
308
L a79
L b139
309
L a81
L b126
310
L a81
L b139
311
L a97
L b126
312
L a97
L b139
313
L a102
L b126
314
L a102
L b139
315
L a104
L b126
316
L a104
L b139
317
L a120
L b126
318
L a120
L b139
319
L a125
L b126
320
L a125
L b139
321
L a212
L b126
322
L a212
L b139
323
L a214
L b126
324
L a214
L b139
325
L a217
L b126
326
L a217
L b139
327
L a219
L b126
328
L a219
L b139
329
L a226
L b126
330
L a226
L b139
331
L a304
L b126
332
L a304
L b139
333
L a306
L b126
334
L a306
L b139
335
L a309
L b126
336
L a309
L b139
337
L a311
L b126
338
L a311
L b139
339
L a321
L b126
340
L a321
L b139
341
L a323
L b126
342
L a323
L b139
343
L a332
L b126
344
L a332
L b139
345
L a351
L b126
346
L a351
L b139
347
L a356
L b126
348
L a356
L b139
349
L a375
L b126
350
L a375
L b139
351
L a422
L b126
352
L a422
L b139
353
L a427
L b126
354
L a427
L b139
355
L a450
L b126
356
L a450
L b139
357
L a473
L b126
358
L a473
L b139
359
L a496
L b126
360
L a496
L b139
361
L a606
L b126
362
L a606
L b139
363
L a611
L b126
364
L a611
L b139
365
L a634
L b126
366
L a634
L b139
367
L a899
L b126
368
L a899
L b139
369
L a923
L b126
370
L a923
L b139
371
L a51
L b245
372
L a309
L b245
373
L a56
L b245
374
L a311
L b245
375
L a58
L b245
376
L a321
L b245
377
L a74
L b245
378
L a323
L b245
379
L a79
L b245
380
L a332
L b245
381
L a81
L b245
382
L a351
L b245
383
L a97
L b245
384
L a356
L b245
385
L a102
L b245
386
L a375
L b245
387
L a104
L b245
388
L a422
L b245
389
L a120
L b245
390
L a427
L b245
391
L a125
L b245
392
L a450
L b245
393
L a212
L b245
394
L a473
L b245
395
L a214
L b245
396
L a496
L b245
397
L a217
L b245
398
L a606
L b245
399
L a219
L b245
400
L a611
L b245
401
L a226
L b245
402
L a634
L b245
403
L a304
L b245
404
L a899
L b245
405
L a306
L b245
406
L a923
L b245
407
L a993
L b31
408
L a993
L b90
409
L a997
L b31
410
L a997
L b90
411
L a1008
L b31
412
L a1008
L b90
413
L a995
L b31
414
L a995
L b90
415
L a1300
L b31
416
L a1300
L b88
417
L a1308
L b31
418
L a1308
L b88
419
L a1314
L b31
420
L a1314
L b88
421
L a1315
L b31
422
L a1315
L b88
423
L a1316
L b31
424
L a1316
L b88
425
L a1317
L b31
426
L a1317
L b88
427
L a1321
L b31
428
L a1321
L b88
429
L a1323
L b31
430
L a1323
L b88
431
L a1324
L b31
432
L a1324
L b88
433
L a1326
L b31
434
L a1326
L b88
435
L a1330
L b31
436
L a1330
L b88
437
L a1331
L b31
438
L a1331
L b88
439
L a1334
L b31
440
L a1334
L b88
441
L a1335
L b31
442
L a1335
L b88
443
L a1338
L b31
444
L a1338
L b88
445
L a1339
L b31
446
L a1339
L b88
447
L a1340
L b31
448
L a1340
L b88
449
L a993
L b122
450
L a993
L b126
451
L a997
L b122
452
L a997
L b126
453
L a1008
L b122
454
L a1008
L b126
455
L a995
L b122
456
L a995
L b126
457
L a1300
L b122
458
L a1300
L b126
459
L a1308
L b122
460
L a1308
L b126
461
L a1314
L b122
462
L a1314
L b126
463
L a1315
L b122
464
L a1315
L b126
465
L a1316
L b122
466
L a1316
L b126
467
L a1317
L b122
468
L a1317
L b126
469
L a1321
L b122
470
L a1321
L b126
471
L a1323
L b122
472
L a1323
L b126
473
L a1324
L b122
474
L a1324
L b126
475
L a1326
L b122
476
L a1326
L b126
477
L a1330
L b122
478
L a1330
L b126
479
L a1331
L b122
480
L a1331
L b126
481
L a1334
L b122
482
L a1334
L b126
483
L a1335
L b122
484
L a1335
L b126
485
L a1338
L b122
486
L a1338
L b126
487
L a1339
L b122
488
L a1339
L b126
489
L a1340
L b122
490
L a1340
L b126
491
L a997
L b139
492
L a997
L b135
493
L a1008
L b139
494
L a1008
L b135
495
L a995
L b139
496
L a995
L b135
497
L a1300
L b139
498
L a1300
L b135
499
L a1308
L b139
500
L a1308
L b135
501
L a1314
L b139
502
L a1314
L b135
503
L a1315
L b139
504
L a1315
L b135
505
L a1316
L b139
506
L a1316
L b135
507
L a1317
L b139
508
L a1317
L b135
509
L a1321
L b139
510
L a1321
L b135
511
L a1323
L b139
512
L a1323
L b135
513
L a1324
L b139
514
L a1324
L b135
515
L a1326
L b139
516
L a1326
L b135
517
L a1330
L b139
518
L a1330
L b135
519
L a1331
L b139
520
L a1331
L b135
521
L a1334
L b139
522
L a1334
L b135
523
L a1335
L b139
524
L a1335
L b135
525
L a1338
L b139
526
L a1338
L b135
527
L a1339
L b139
528
L a1339
L b135
529
L a1340
L b139
530
L a1340
L b135 .
23 . An electroluminescent device, comprising:
an anode,
a cathode, and
an organic layer disposed between the anode and the cathode, wherein the organic layer comprises the metal complex of claim 1 .
24 . The electroluminescent device of claim 23 , wherein the organic layer is an emissive layer, and the metal complex is a luminescent material.
25 . The electroluminescent device of claim 24 , wherein the electroluminescent device emits red light or white light.
26 . The electroluminescent device of claim 25 , wherein the emissive layer further comprises at least one host material.
27 . A compound composition, comprising the metal complex of claim 1 .
28 . The metal complex of claim 1 , wherein in the L a , ring A, ring C are, at each occurrence identically or differently, selected from a benzene ring, a naphthalene ring, a pyridine ring, a pyrimidine ring, a pyrazine ring, an aza-naphthalene ring, a furan ring, a thiophene ring, an isoxazole ring, an isothiazole ring, a pyrrole ring, a pyrazole ring, a benzofuran ring, a benzothiophene ring, an azabenzofuran ring or an azabenzothiophene ring.