Electroluminescent metal complex
Metal complexes of the formula I or I′ [LDH] n M[L] m (I) [LTH](M[L] p ) 2 (I1) wherein n is an integer 1 or 2, m and p each is an integer 1 or 2, the sum (n+m) being 2 or 3, M is a metal with an atomic weight of greater than 40 such as Iridium, L is a ligand as described in claim 1 , and LDH is a bidentate ligand of the formula I1 and LTH is a dimer of LDH, binding to 2 metal atoms M, of the formula II′ wherein W is selected from O, S, NR 4 , CR 5 R 6 , X is N or CR 7 , Y is selected from O, S, NR 8 ; and further residues are as defined in claim 1 , show good light emitting efficiency in electroluminescent applications.
1. Compound of the formula I or I′
[LDH] n M[L] m (I)
[LTH](M[L] p ) 2 (I′)
wherein
n is an integer 1 or 2,
m and p each is an integer 1 or 2,
the sum (n+m) being 2 or 3,
M is a metal with an atomic weight of greater than 40,
L is a moiety
consisting of
2 monodentate ligands CyC and CyN or CyC and CyC, or
1 bidentate ligand other than LDH or LTH, wherein the 2 moieties CyC and CyN, or CyC and CyC, are interlinked by a chemical bond,
wherein CyC is an organic moiety containing a carbon atom bonding to M, and CyN is a cyclic organic moiety containing a nitrogen atom bonding to M;
LDH is a bidentate ligand of the formula II
and LTH is a dimer of LDH, binding to 2 metal atoms M, of the formula II′
wherein
W is selected from O, S, NR 4 and CR 5 R 6 ,
X is N or CH,
Y is selected from O, S and NR 8 ;
R 1 and R 2 independently are H, unsubstituted or substituted C 1 -C 18 alkyl, unsubstituted or substituted C 2 -C 18 alkenyl, unsubstituted or substituted C 5 -C 10 aryl, unsubstituted or substituted C 5 -C 10 heteroaryl, C 1 -C 18 acyl, halogen, C 1 -C 18 alkoxy,
C 1 -C 18 alkylthio, C 3 -C 12 cycloalkyl, C 1 -C 18 acyloxy, C 5 -C 10 aryloxy,
C 3 -C 12 cycloalkyloxy, COR, CH═NR, CH═N—OH, CH═N—OR, COOR, CONHR, CONRR′, CONH—NHR, CONH—NRR′, SO 2 R, SO 3 R, SO 2 NHR, SO 2 NRR′,
SO 2 NH—NHR, SO 2 NH—NRR′, S(O)R, S(O)OR, S(O)NHR, S(O)NRR′, S(O)NH—NHR,
S(O)NH—NRR′, SiRR′R″, PORR′, PO(OR)R′, PO(OR) 2 , PO(NHR) 2 , PO(NRR′) 2 , CN, NO 2 , NHR, NRR′, NH—NHR, NH—NRR′ or CONROH;
R is H, C 1 -C 12 alkyl, C 5 -C 10 aryl or C 3 -C 12 cycloalkyl,
R′ and R″ independently are selected from C 1 -C 12 alkyl, C 5 -C 10 aryl and C 3 -C 12 cycloalkyl,
or neighbouring residues R 1 and R 2 form an organic bridging group completing, together with the carbon atoms they are bonding to, a carbocyclic or heterocyclic, non-aromatic or aromatic ring of 5 to 7 ring atoms in total, which optionally may be substituted;
R 4 , R 5 , R 6 independently are H, unsubstituted or substituted C 1 -C 18 alkyl, unsubstituted or substituted C 2 -C 18 alkenyl, unsubstituted or substituted C 5 -C 10 aryl, unsubstituted or substituted C 2 -C 10 heteroaryl, C 1 -C 18 acyl;
R 3 is H, unsubstituted or substituted C 1 -C 18 alkyl, unsubstituted or substituted C 2 -C 18 alkenyl, unsubstituted or substituted C 5 -C 10 aryl, unsubstituted or substituted C 2 -C 10 heteroaryl, C 1 -C 18 acyl, OR, SR, NRR′, or is C 2 -C 5 alkynyl, C 3 -C 5 cycloalkyl, hetero-C 2 -C 5 cycloalkyl or C 3 -C 5 cycloalkenyl each unsubstituted or mono- or poly-substituted by COR, COOR, CONRR′, CN, halogen and/or by OR;
R′ 3 is unsubstituted or substituted C 1 -C 18 alkylene, unsubstituted or substituted C 2 -C 18 alkenylene, unsubstituted or substituted C 5 -C 10 arylene, unsubstituted or substituted C 2 -C 10 heteroarylene or C 2 -C 18 diacylene; and
R 8 is hydrogen or a substituent.
2. Compound of claim 1 , wherein formula I is formula (III) or tautomeric forms thereof,
wherein
is a bidentate C,N-binding ligand, CyC and CyN are interlinked by a chemical bond,
n is 1,
M is Ir and m is 2 or
M is Pt and m is 1;
W is O, S, NR 4 , CR 5 R 6 ,
X is N or CH,
Y is O or NR 8 ;
R 1 , R 2 independently are selected from H, C 1 -C 8 alkyl, phenyl, halogen, C 1 -C 8 alkoxy, CN, NHR, NRR′;
or R 1 and R 2 together with the carbon atoms they are bonding to form an annellated phenyl ring, which optionally may be substituted;
R 3 is H, unsubstituted or substituted C 1 -C 8 alkyl, unsubstituted or substituted C 2 -C 8 alkenyl, unsubstituted or substituted phenyl;
R 4 , R 5 , R 6 independently are H or C 1 -C 8 alkyl;
R 8 is H, C 1 -C 8 alkyl, COR, SO 2 R; and
R and R′ independently are selected from C 1 -C 6 alkyl, and R may also be hydrogen.
3. Compound of claim 2 , wherein
is
4. Compound of claim 1 of formula (I) or (I′) wherein
Y is O or NR 8 ;
M is selected from Tl, Pb, Bi, In, Sn, Sb, Te, Mo, Cr, Mn, Ta, V, Cu, Fe, Ru, Ni, Co, Ir, Pt, Pd, Rh, Re, Os, Ag and Au;
R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 8 are as defined above and, if substituted, the substituent is selected from halogen, C 1 -C 12 alkoxy, C 1 -C 12 alkylthio, benzoyl substituted by C 1 -C 4 alkyl or C 1 -C 4 alkoxy or halogen, benzoyloxy substituted by C 1 -C 4 alkyl or C 1 -C 4 alkoxy or halogen, phenyl, phenyloxy, C 3 -C 12 cycloalkyl, C 3 -C 12 cycloalkyloxy, or from the residues COR, OCOR, COOR, CONHR, CONRR′, SO 2 R, SO 3 R, SO 2 NHR, SO 2 NRR′, SiRR′R″, PORR′, PO(OR)R′, PO(OR) 2 , CN, NO 2 , NHR, NRR′, NH—NHR, NH—NRR′,
where R, R′ and R″ independently are selected from C 1 -C 12 alkyl, C 1 -C 6 haloalkyl, phenyl, cyclopentyl, cyclohexyl; and R may also be hydrogen.
5. Compound according to claim 1 , wherein L is selected from the ligands:
a) of formula
wherein
R 6 , R 7 , R 8 , and R 9 are independently of each other hydrogen, C 1 -C 24 alkyl, C 2 -C 24 alkenyl, C 2 -C 24 alkynyl, aryl, heteroaryl, C 1 -C 24 alkoxy, C 1 -C 24 alkylthio, cyano, acyl, alkyloxycarbonyl, a nitro group, or a halogen atom; or
two substituents R 6 , R 7 , R 8 , and R 9 , which are adjacent to each other, together form a group
wherein R 205 , R 206 , R 207 and R 208 are independently of each other H, or C 1 -C 8 alkyl,
the ring A represents an optionally substituted aryl or heteroaryl group; or the ring A may be taken with the pyridyl group binding to the ring A to form a ring; the alkyl group, alkenyl group, alkynyl group, aryl group, heteroaryl group, alkoxy group, alkylthio group, acyl group, and alkyloxycarbonyl group represented by R 6 , R 7 , R 8 , and R 9 may be substituted;
b) of formula
wherein Y′ is S, O, NR 200 , wherein
R 200 is hydrogen, cyano, C 1 -C 4 alkyl, C 2 -C 4 alkenyl, C 6 -C 10 aryl, —(CH 2 ) r —Ar wherein Ar is C 6 -C 10 aryl, a group —(CH 2 ) r′ X 20 , wherein r′ is an integer of 1 to 5, X 20 is halogen, hydroxy, —O—C 1 -C 4 alkyl, di(C 1 -C 4 alkyl)amino, amino, or cyano; a group —(CH 2 ) r OC(O)(CH 2 )r″CH 3 , wherein r is 1, or 2, and r″ is 0, or 1;
—NH-Ph, —C(O)CH 3 , —CH 2 —O—(CH 2 ) 2 —Si(CH 3 ) 3 , or
c) of formula
wherein
Q 1 and Q 2 are independently of each other hydrogen, C 1 -C 24 alkyl, or C 6 -C 18 aryl,
A 21 is hydrogen, halogen, C 1 -C 4 alkoxy, or C 1 -C 4 alkyl,
A 22 is hydrogen, halogen, C 1 -C 12 alkoxy, C 1 -C 12 alkyl, or C 6 -C 10 aryl,
A 23 is hydrogen, halogen, C 1 -C 12 alkoxy, C 1 -C 12 alkyl, or C 6 -C 10 aryl,
A 24 is hydrogen, halogen, C 1 -C 4 alkoxy, or C 1 -C 4 alkyl, or
A 22 and A 23 , or A 23 and A 24 together form a group
wherein R 205 , R 206 , R 207 and R 208 are independently of each other H, halogen, C 1 -C 12 alkoxy, or C 1 -C 12 alkyl,
R 42 is H, halogen, C 1 -C 12 alkyl, C 1 -C 12 alkoxy, or C 1 -C 4 perfluoroalkyl,
R 43 is H, halogen, C 1 -C 12 alkyl, C 1 -C 12 alkoxy, C 1 -C 4 perfluoroalkyl, C 7 -C 15 aralkyl, or C 6 -C 10 aryl,
R 44 is H, halogen, C 1 -C 12 alkyl, C 1 -C 12 alkoxy, C 6 -C 10 aryl, C 7 -C 15 aralkyl, or C 1 -C 4 perfluoroalkyl,
R 45 is H, halogen, C 1 -C 12 alkyl, C 1 -C 12 alkoxy, or C 1 -C 4 perfluoroalkyl;
d1) of formula
wherein
n is 0, 1 or 2;
A 12 , A 14 , A 16 , A 21 , A 22 , A 23 , and A 24 are independently of each other hydrogen, CN, halogen, C 1 -C 24 alkyl, C 1 -C 24 alkoxy, C 1 -C 24 alkylthio, C 1 -C 24 perfluoroalkyl, C 6 -C 18 aryl, which is optionally substituted by G; —NR 25 R 26 , —CONR 25 R 26 , or —COOR 27 , or C 2 -C 10 heteroaryl, which is optionally substituted by G; or C 5 -C 12 cycloalkyl, C 5 -C 12 cycloalkoxy, C 5 -C 12 cycloalkylthio, each of which is optionally substituted by G;
2 adjacent radicals A 14 , A 17 or A 17 , A 16 , bonding to vicinal atoms, together are a group of formula
wherein A 41 , A 42 , A 43 , A 44 , A 45 , and A 46 are independently of each other H, halogen, CN, C 1 -C 24 alkyl, C 1 -C 24 perfluoroalkyl, C 1 -C 24 alkoxy, C 1 -C 24 alkylthio, C 6 -C 18 aryl, which may optionally be substituted by G, —NR 25 R 26 , —CONR 25 R 26 , or —COOR 27 , or C 2 -C 10 heteroaryl;
A 11 , A 13 , A 15 , A′ 21 , A′ 22 , A′ 23 , and A′ 24 are independently of each other is hydrogen or C 1 -C 24 alkyl;
or 2 adjacent radicals A 11 , A 12 ; A 13 , A 14 ; A 15 , A 16 ; A′ 21 , A 21 ; A′ 22 , A 22 ; A′ 23 , A 23 ; A′ 24 , A 24 , bonding to the same carbon atom, together are ═O or ═NR 25 or ═N—OR 25 or ═N—OH;
R 25 and R 26 are independently of each other C 6 -C 18 aryl, C 7 -C 15 aralkyl, or C 1 -C 24 alkyl,
R 27 is C 1 -C 24 alkyl, C 6 -C 18 aryl, or C 7 -C 18 aralkyl;
or
d2) of the formula
wherein
A′ 22 and A′ 23 are independently of each other hydrogen or C 1 -C 24 alkyl;
2 adjacent radicals A 18 , A 22 and A 23 , A 19 , bonding to vicinal atoms, together are a group of formula
wherein A 41 , A 42 , A 43 , A 44 , A 45 , and A 46 are independently of each other H, halogen, CN, C 1 -C 24 alkyl, C 1 -C 24 perfluoroalkyl, C 1 -C 24 alkoxy, C 1 -C 24 alkylthio, C 6 -C 18 aryl, which may optionally be substituted by G, —NR 25 R 26 , —CONR 25 R 26 , or —COOR 27 , or C 2 -C 10 heteroaryl;
R 25 and R 26 are independently of each other C 6 -C 18 aryl, C 7 -C 18 aralkyl, or C 1 -C 24 alkyl, R 27 is C 1 -C 24 alkyl, C 6 -C 18 aryl, or C 7 -C 18 aralkyl; and
for d1) and d2):
Y 1 , Y 2 and Y 3 are independently of each other a group of formula
wherein
R 41 is the bond to M,
R 71 is the bond to M,
R 42 is hydrogen, C 1 -C 24 alkyl, CN, C 1 -C 24 alkyl, which is substituted by halogen, C 6 -C 18 -aryl, C 6 -C 18 -aryl substituted by C 1 -C 12 alkyl, or C 1 -C 8 alkoxy,
R 43 is hydrogen, CN, halogen, C 1 -C 24 alkyl substituted by F, C 6 -C 18 aryl, C 6 -C 18 aryl substituted by C 1 -C 12 alkyl, or C 1 -C 8 alkoxy, —CONR 25 R 26 , —COOR 27 ,
wherein
E 2 is —S—, —O—, or —NR 25′ —, wherein R 25′ is C 1 -C 24 alkyl, or C 6 -C 10 aryl,
or
R 42 and R 43 are a group of formula
wherein A 41 , A 42 , A 43 , A 44 , A 45 , and A 46 are independently of each other H, halogen, CN, C 1 -C 24 alkyl, C 1 -C 24 perfluoroalkyl, C 1 -C 24 alkoxy, C 1 -C 24 alkylthio, C 6 -C 18 aryl, which may optionally be substituted by G, —NR 25 R 26 , —CONR 25 R 26 , or —COOR 27 , or C 2 -C 10 heteroaryl;
R 44 is hydrogen, CN, C 1 -C 24 alkyl, C 1 -C 24 alkyl substituted by F, halogen, C 6 -C 18 -aryl, C 6 -C 18 -aryl substituted by C 1 -C 12 alkyl, or C 1 -C 8 alkoxy,
R 45 is hydrogen, CN, C 1 -C 24 alkyl, C 1 -C 24 alkyl substituted by F, halogen, C 6 -C 18 -aryl, C 6 -C 18 -aryl substituted by C 1 -C 12 alkyl, or C 1 -C 8 alkoxy,
A 11′ , A 12′ , A 13′ and A 14′ are independently of each other H, halogen, CN, C 1 -C 24 alkyl, C 1 -C 24 alkoxy, C 1 -C 24 alkylthio, —NR 25 R 26 , —CONR 25 R 26 , or —COOR 27 ,
R 68 and R 69 are independently of each other C 1 -C 24 alkyl, which may be interrupted by one or two oxygen atoms,
R 70 , R 72 , R 73 , R 74 , R 75 , R 76 , R 90 , R 91 , R 92 , and R 93 are independently of each other H, halogen, CN, C 1 -C 24 alkyl, C 6 -C 10 aryl, C 1 -C 24 alkoxy, C 1 -C 24 alkylthio, —NR 25 , R 26 , —CONR 25 R 26 , or —COOR 27 , wherein R 25 , R 26 and R 27 are as defined above and
G is C 1 -C 18 alkyl, —OR 305 , —SR 305 , —NR 305 R 306 , —CONR 305 R 306 , or —CN, wherein R 305 and R 306 are independently of each other C 6 -C 18 aryl; C 6 -C 18 aryl which is substituted by C 1 -C 18 alkyl, or C 1 -C 18 alkoxy; C 1 -C 18 alkyl, or C 1 -C 18 alkyl which is interrupted by —O—; or R 305 and R 306 together form
e) of formula
wherein
R 6 is hydrogen, halogen, nitro, C 1 -C 4 alkyl, C 1 -C 4 perfluoroalkyl, C 1 -C 4 alkoxy, or C 6 -C 10 aryl,
R 7 is hydrogen, halogen, C 1 -C 4 alkyl, C 1 -C 4 perfluoroalkyl, C 6 -C 10 aryl, C 6 -C 10 perfluoroaryl,
R 8 is hydrogen, C 1 -C 4 alkyl, C 1 -C 8 alkoxy, C 1 -C 4 perfluoroalkyl, C 6 -C 10 aryl, C 6 -C 10 perfluoroaryl,
R 9 is hydrogen, halogen, nitro, cyano, C 1 -C 4 alkyl, C 1 -C 4 perfluoroalkyl, C 1 -C 4 alkoxy, or C 6 -C 10 aryl,
A 10 is hydrogen, halogen, nitro, cyano, C 1 -C 4 alkyl, C 2 -C 4 alkenyl, C 1 -C 4 perfluoroalkyl, —O—C 1 -C 4 perfluoroalkyl, tri(C 1 -C 4 alkyl)silanyl, C 6 -C 10 aryl, or C 6 -C 10 perfluoroaryl,
A 11 is hydrogen, halogen, nitro, cyano, C 1 -C 4 alkyl, C 2 -C 4 alkenyl, C 1 -C 4 perfluoroalkyl, —O—C 1 -C 4 perfluoroalkyl, tri(C 1 -C 4 alkyl)silanyl, C 6 -C 10 aryl, or C 6 -C 10 perfluoroaryl,
A 12 is hydrogen, halogen, nitro, hydroxy, mercapto, amino, C 1 -C 4 alkyl, C 2 -C 4 alkenyl, C 1 -C 4 perfluoroalkyl, C 1 -C 4 alkoxy, —O—C 1 -C 4 perfluoroalkyl, —S—C 1 -C 4 alkyl, a group —(CH 2 ) r X 20 , wherein r is 1, or 2, X 20 is halogen, hydroxy, cyano, —O—C 1 -C 4 alkyl, di(C 1 -C 4 alkyl)amino, —CO 2 X 21 , wherein X 21 is H, or C 1 -C 4 alkyl; —CH═CHCO 2 X 22 , wherein X 22 is C 1 -C 4 alkyl; —CH(O), —SO 2 X 23 , —SOX 23 , —NC(O)X 23 , —NSO 2 X 23 , —NHX 23 , —N(X 23 ) 2 , wherein X 23 is C 1 -C 4 alkyl; tri(C 1 -C 4 alkyl)siloxanyl, —O—C 6 -C 10 aryl, cyclohexyl, C 6 -C 10 aryl, or C 6 -C 10 perfluoroaryl, and
A 13 is hydrogen, nitro, cyano, C 1 -C 4 alkyl, C 2 -C 4 alkenyl, C 1 -C 4 perfluoroalkyl, —O—C 1 -C 4 perfluoroalkyl, tri(C 1 -C 4 alkyl)silanyl, or C 6 -C 10 aryl.
6. Compound of claim 1 , wherein n is an integer 1,
M is Co, Fe, Ir or Rh, and m is 2, or
M is Ni, Rh, Ru, Pd or Pt, and m is 1,
R 1 , R 2 independently are selected from H, unsubstituted or substituted C 1 -C 8 alkyl, unsubstituted or substituted phenyl, halogen, C 1 -C 8 alkoxy, COR, COOR, SO 2 R, CN, NHR and NRR′;
or the neighbouring residues R 1 and R 2 form an organic bridging group completing, together with the carbon atoms they are bonding to, an annellated phenyl ring, which optionally may be substituted;
R 5 , R 6 independently are unsubstituted or substituted C 1 -C 8 alkyl, unsubstituted or substituted C 2 -C 8 alkenyl, unsubstituted or substituted phenyl;
R 4 is as defined for R 5 or is hydrogen;
R 3 is unsubstituted or substituted C 1 -C 8 alkyl, unsubstituted or substituted C 2 -C 8 alkenyl, unsubstituted or substituted phenyl; and
any substituent, if present, is selected from halogen, C 1 -C 8 alkyl, C 1 -C 8 alkoxy, phenyl, phenyloxy, COR, OCOR, COOR, SO 2 R, CN, NHR, NRR′; and
R and R′ independently are selected from C 1 -C 6 alkyl, and R may also be hydrogen;
R 8 is H, SO 2 —R 11 , CO—R 11 , where R 11 is C 1 -C 12 alkyl, C 1 -C 12 haloalkyl, phenyl, phenyl substituted by halogen.
7. An organic electronic device comprising an emitting layer wherein the emitting layer comprises a compound according to claim 1 .
8. The device of claim 7 , further comprising a hole transport layer selected from polyvinyl-carbazol, N, N′-diphenyl-N, N′-bis(3-methylphenyl)-[1,1′-biphenyl]-4,4′-diamine (TPD), 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC), N,N′-bis(4-methylphenyl)-N,N′-bis(4-ethylphenyl)-[1,1′-(3,3′-dimethyl)biphenyl]4,4′-diamine (ETPD), tetrakis-(3-methylphenyl)-N,N,N′,N′-2,5-phenylenediamine (PDA), a-phenyl-4-N,N-diphenylaminostyrene (TPS), p-(diethylamino)benzaldehydediphenylhydrazone (DEH), triphenylamine (TPA), bis[4-(N,N-diethylamino)-2-methylphenyl](4-methylphenyl)methane (MPMP), 1-phenyl-3-[p-(diethylamino)styryl]-5-[p-(diethylamino)phenyl]pyrazoline (PPR or DEASP), 1,2-trans-bis (9H-carbazol-9-yl)cyclobutane (DCZB), N,N,N′,N′-tetrakis (4-methylphenyl)-(1,1′-biphenyl)-4,4′-diamine (TTB), 4,4′-N,N-dicarbazole-biphenyl (CBP), N,N-dicarbazoyl-1,4-dimethene-benzene (DCB), porphyrinic compounds, and combinations thereof.
9. A compound of formula (III) or tautomeric forms thereof,
wherein
is a bidentate C,N-binding ligand, CyC and CyN are interlinked by a chemical bond,
n is 1,
M is Ir and m is 2 or
M is Pt and m is 1; and
wherein the moiety
is selected from a group consisting of
10. Compound of claim 1 , wherein formula (I′) is
with n=2.
11. Compound of the formula I
[LDH] n M[L] m (I),
wherein
n is an integer 1,
M is Co, Fe, Ir, or Rh, and
m is 2, or
M is Ni, Rh, Ru, Pd, or Pt, and
m is 1,
LDH is a bidentate ligand of the formula II
wherein
W is selected from O, S, NR 4 , CR 5 R 6 ,
X is N or CH,
Y is selected from O, S, NR 8 ;
R 1 , R 2 independently are selected from H, unsubstituted or substituted C 1 -C 8 alkyl, unsubstituted or substituted phenyl, halogen, C 1 -C 8 alkoxy, COR, COOR, SO 2 R, CN, NHR, NRR′;
or the neighbouring residues R 1 and R 2 form an organic bridging group completing, together with the carbon atoms they are bonding to, an annellated phenyl ring, which optionally may be substituted;
R 4 , R 5 , R 6 independently are H, unsubstituted or substituted C 1 -C 8 alkyl, unsubstituted or substituted C 2 -C 8 alkenyl, unsubstituted or substituted phenyl;
R 3 is H, unsubstituted or substituted C 1 -C 8 alkyl, unsubstituted or substituted C 2 -C 8 alkenyl, unsubstituted or substituted phenyl; and
any substituent, if present, is selected from halogen, C 1 -C 8 alkyl, C 1 -C 8 alkoxy, phenyl, phenyloxy, COR, OCOR, COOR, SO 2 R, CN, NHR, NRR′; and
R and R′ independently are selected from C 1 -C 6 alkyl, and R may also be hydrogen;
R 8 is H, SO 2 —R 11 , CO—R 11 , where R ii is C 1 -C 12 alkyl, C 1 -C 12 haloalkyl, phenyl, phenyl substituted by halogen; and
L is a bidentate ligand and is selected from the ligands:
a) of formula
wherein R 6 , R 7 , R 8 , and R 9 are independently of each other hydrogen, C 1 -C 24 alkyl, C 2 -C 24 alkenyl, C 2 -C 24 alkynyl, aryl, heteroaryl, C 1 -C 24 alkoxy, C 1 -C 24 alkylthio, cyano, acyl, alkyloxycarbonyl, a nitro group, or a halogen atom; or
two R 6 , R 7 , R 8 , and R 9 , which are adjacent to each other, together form a group
wherein R 205 , R 206 , R 207 and R 208 are independently of each other H, or C 1 -C 8 alkyl,
the ring A represents an optionally substituted aryl or heteroaryl group; or the ring A may be taken with the pyridyl group binding to the ring A to form a ring; the alkyl group, alkenyl group, alkynyl group, aryl group, heteroaryl group, alkoxy group, alkylthio group, acyl group, and alkyloxycarbonyl group represented by R 6 , R 7 , R 8 , and R 9 may be substituted;
b) of the formula
wherein Y′ is S, O, NR 200 , wherein
R 200 is hydrogen, cyano, C 1 -C 4 alkyl, C 2 -C 4 alkenyl, optionally substituted C 6 -C 10 aryl, —(CH 2 ) r —Ar wherein Ar is an optionally substituted C 6 -C 10 aryl, a group —(CH 2 ) r′ X 20 , wherein r′ is an integer of 1 to 5, X 20 is halogen, hydroxy, —O—C 1 -C 4 alkyl, di(C 1 -C 4 alkyl)amino, amino, or cyano; a group —(CH 2 ) r OC(O)(CH 2 )r″CH 3 , wherein r is 1, or 2, and r″ is 0, or 1;
—NH-Ph, —C(O)CH 3 , —CH 2 —O—(CH 2 ) 2 —Si(CH 3 ) 3 , or
c) of the formula
wherein
Q 1 and Q 2 are independently of each other hydrogen, C 1 -C 24 alkyl, or C 6 -C 18 aryl,
A 21 is hydrogen, halogen, C 1 -C 4 alkoxy, or C 1 -C 4 alkyl,
A 22 is hydrogen, halogen, C 1 -C 12 alkoxy, C 1 -C 12 alkyl, or C 6 -C 10 aryl,
A 23 is hydrogen, halogen, C 1 -C 12 alkoxy, C 1 -C 12 alkyl, or C 6 -C 10 aryl,
A 24 is hydrogen, halogen, C 1 -C 4 alkoxy, or C 1 -C 4 alkyl, or
A 22 and A 23 , or A 23 and A 24 together form a group
wherein R 205 , R 206 , R 207 and R 208 are independently of each other H, halogen, C 1 -C 12 alkoxy, or C 1 -C 12 alkyl,
R 42 is H, halogen, C 1 -C 12 alkyl, C 1 -C 12 alkoxy, or C 1 -C 4 perfluoroalkyl,
R 43 is H, halogen, C 1 -C 12 alkyl, C 1 -C 12 alkoxy, C 1 -C 4 perfluoroalkyl, C 7 -C 15 aralkyl, or C 6 -C 10 aryl,
R 44 is H, halogen, C 1 -C 12 alkyl, C 1 -C 12 alkoxy, C 6 -C 10 aryl, C 7 -C 15 aralkyl, or C 1 -C 4 perfluoroalkyl,
R 45 is H, halogen, C 1 -C 12 alkyl, C 1 -C 12 alkoxy, or C 1 -C 4 perfluoroalkyl;
d1) of the formula
wherein
n is 0, 1 or 2,
A 12 , A 14 , A 16 , A 21 , A 22 , A 23 , and A 24 are independently of each other hydrogen, CN, halogen, C 1 -C 24 alkyl, C 1 -C 24 alkoxy, C 1 -C 24 alkylthio, C 1 -C 24 perfluoroalkyl, C 6 -C 18 aryl, which is optionally substituted by G; —NR 25 R 26 , —CONR 25 R 26 , or —COOR 27 , or C 2 -C 10 heteroaryl, which is optionally substituted by G; or C 5 -C 12 cycloalkyl, C 5 -C 12 cycloalkoxy, C 5 -C 12 cycloalkylthio, each of which is optionally substituted by G;
2 adjacent radicals A 14 , A 17 or A 17 , A 16 , bonding to vicinal atoms, together are a group of formula
wherein A 41 ,A 42 , A 43 , A 44 , A 45 , and A 46 are independently of each other H, halogen, CN, C 1 -C 24 alkyl, C 1 -C 24 perfluoroalkyl, C 1 -C 24 alkoxy, C 1 -C 24 alkylthio, C 6 -C 18 aryl, which may optionally be substituted by G, —NR 25 R 26 , —CONR 25 R 26 , or —COOR 27 , or C 2 -C 10 heteroaryl;
A 11 , A 13 , A 15 , A′ 21 , A′ 22 , A′ 23 and A′ 24 are independently of each other hydrogen or C 1 -C 24 alkyl;
or 2 adjacent radicals A 11 , A 12 ; A 13 , A 14 ; A 15 , A 16 ; A′ 21 , A 21 ; A′ 22 , A 22 ; A′ 23 , A 23 ; A′ 24 , A 24 , bonding to the same carbon atom, together are ═O or ═NR 25 or ═N—OR 25 or ═N—OH;
R 25 and R 26 are independently of each other C 6 -C 18 aryl, C 7 -C 18 aralkyl, or C 1 -C 24 alkyl, R 27 is C 1 -C 24 alkyl, C 6 -C 18 aryl, or C 7 -C 18 aralkyl;
or
d2) of the formula
wherein
A′ 22 and A′ 23 are independently of each other hydrogen or C 1 -C 24 alkyl;
2 adjacent radicals A 18 , A 22 and A 23 , A 19 , bonding to vicinal atoms, together are a group of formula
wherein A 41 , A 42 , A 43 , A 44 , A 45 , and A 46 are independently of each other H, halogen, CN, C 1 -C 24 alkyl, C 1 -C 24 perfluoroalkyl, C 1 -C 24 alkoxy, C 1 -C 24 alkylthio, C 6 -C 18 aryl, which may optionally be substituted by G, —NR 25 R 26 , —CONR 25 R 26 , or —COOR 27 , or C 2 -C 10 heteroaryl;
R 25 and R 26 are independently of each other C 6 -C 18 aryl, C 7 -C 18 aralkyl, or C 1 -C 24 alkyl, R 27 is C 1 -C 24 alkyl, C 6 -C 18 aryl, or C 7 -C 18 aralkyl; and
for d1) and d2):
Y 1 , Y 2 and Y 3 are independently of each other a group of formula
wherein
R 41 is the bond to M,
R 71 is the bond to M,
R 42 is hydrogen, or C 1 -C 24 alkyl, CN, C 1 -C 24 alkyl, which is substituted by halogen, C 6 -C 18 -aryl, C 6 -C 18 -aryl substituted by C 1 -C 12 alkyl, or C 1 -C 8 alkoxy,
R 43 is hydrogen, CN, halogen, C 1 -C 24 alkyl substituted by F, C 6 -C 18 aryl, C 6 -C 18 aryl substituted by C 1 -C 12 alkyl, or C 1 -C 8 alkoxy, —CONR 25 R 26 , —COOR 27 ,
wherein
E 2 is —S—, —O—, or —NR 25′ —, wherein R 25′ is C 1 -C 24 alkyl, or C 6 -C 10 aryl,
or R 42 and R 43 are a group of formula
wherein A 41 , A 42 , A 43 , A 44 , A 45 , and A 46 are independently of each other H, halogen, CN, C 1 -C 24 alkyl, C 1 -C 24 perfluoroalkyl, C 1 -C 24 alkoxy, C 1 -C 24 alkylthio, C 6 -C 18 aryl, which may optionally be substituted by G, —NR 25 R 26 , —CONR 25 R 26 , or —COOR 27 , or C 2 -C 10 heteroaryl;
R 44 is hydrogen, CN or C 1 -C 24 alkyl, C 1 -C 24 alkyl substituted by F, halogen, C 6 -C 18 -aryl, C 6 -C 18 -aryl substituted by C 1 -C 12 alkyl, or C 1 -C 8 alkoxy,
R 45 is hydrogen, CN or C 1 -C 24 alkyl, C 1 -C 24 alkyl substituted by F, halogen, C 6 -C 18 -aryl, C 6 -C 18 -aryl substituted by C 1 -C 12 alkyl, or C 1 -C 8 alkoxy,
A 11′ , A 12′ , A 13′ , and A 14′ are independently of each other H, halogen, CN, C 1 -C 24 alkyl, C 1 -C 24 alkoxy, C 1 -C 24 alkylthio, —NR 25 R 26 , —CONR 25 R 26 , or —COOR 27 ,
R 68 and R 69 are independently of each other C 1 -C 24 alkyl, which may be interrupted by one or two oxygen atoms,
R 70 , R 72 , R 73 , R 74 , R 75 , R 76 , R 90 , R 91 , R 92 , and R 93 are independently of each other H, halogen, CN, C 1 -C 24 alkyl, C 6 -C 10 aryl, C 1 -C 24 alkoxy, C 1 -C 24 alkylthio, —NR 25 R 26 , —CONR 25 R 26 , or —COOR 27 , wherein R 25 , R 26 and R 27 are as defined above and
G is C 1 -C 18 alkyl, —OR 305 , —SR 305 , —NR 305 R 306 , —CONR 305 R 306 , or —CN, wherein R 305 and R 306 are independently of each other C 6 -C 18 aryl; C 6 -C 18 aryl which is substituted by C 1 -C 18 alkyl, or C 1 -C 18 alkoxy; C 1 -C 18 alkyl, or C 1 -C 18 alkyl which is interrupted by —O—; or R 305 and R 306 together form a five or six membered ring;
e) of formula
wherein R 6 is hydrogen, halogen, nitro, C 1 -C 4 alkyl, C 1 -C 4 perfluoroalkyl, C 1 -C 4 alkoxy, or optionally substituted C 6 -C 10 aryl,
R 7 is hydrogen, halogen, C 1 -C 4 alkyl, C 1 -C 4 perfluoroalkyl, optionally substituted C 6 -C 10 aryl, or optionally substituted C 6 -C 10 perfluoroaryl,
R 8 is hydrogen, C 1 -C 4 alkyl, C 1 -C 8 alkoxy, C 1 -C 4 perfluoroalkyl, optionally substituted C 6 -C 10 aryl, or optionally substituted C 6 -C 10 perfluoroaryl,
R 9 is hydrogen, halogen, nitro, cyano, C 1 -C 4 alkyl, C 1 -C 4 perfluoroalkyl, C 1 -C 4 alkoxy, or optionally substituted C 6 -C 10 aryl,
A 10 is hydrogen, halogen, nitro, cyano, C 1 -C 4 alkyl, C 2 -C 4 alkenyl, C 1 -C 4 perfluoroalkyl, —O—C 1 -C 4 perfluoroalkyl, tri(C 1 -C 4 alkyl)silanyl, optionally substituted C 6 -C 10 aryl, or optionally substituted C 6 -C 10 perfluoroaryl,
A 11 is hydrogen, halogen, nitro, cyano, C 1 -C 4 alkyl, C 2 -C 4 alkenyl, C 1 -C 4 perfluoroalkyl, —O—C 1 -C 4 perfluoroalkyl, tri(C 1 -C 4 alkyl)silanyl, optionally substituted C 6 -C 10 aryl, or optionally substituted C 6 -C 10 perfluoroaryl,
A 12 is hydrogen, halogen, nitro, hydroxy, mercapto, amino, C 1 -C 4 alkyl, C 2 -C 4 alkenyl, C 1 -C 4 perfluoroalkyl, C 1 -C 4 alkoxy, —O—C 1 -C 4 perfluoroalkyl, —S—C 1 -C 4 alkyl, a group —(CH 2 ) r X 20 , wherein r is 1, or 2, X 20 is halogen, hydroxy, cyano, —O—C 1 -C 4 alkyl, di(C 1 -C 4 alkyl)amino, —CO 2 X 21 , wherein X 21 is H, or C 1 -C 4 alkyl; —CH═CHCO 2 X 22 , wherein X 22 is C 1 -C 4 alkyl; —CH(O), —SO 2 X 23 , —SOX 23 , —NC(O)X 23 , —NSO 2 X 23 , —NHX 23 , —N(X 23 ) 2 , wherein X 23 is C 1 -C 4 alkyl; tri(C 1 -C 4 alkyl)siloxanyl, optionally substituted —O—C 6 -C 10 aryl, cyclohexyl, optionally substituted C 6 -C 10 aryl, or optionally substituted C 6 -C 10 perfluoroaryl, and
A 13 is hydrogen, nitro, cyano, C 1 -C 4 alkyl, C 2 -C 4 alkenyl, C 1 -C 4 perfluoroalkyl, —O—C 1 -C 4 perfluoroalkyl, tri(C 1 -C 4 alkyl)silanyl, or optionally substituted C 6 -C 10 aryl.
12. The compound according to claim 11 , wherein
n is an integer 1,
M is Ir, or Rh, and
m is 2.
13. The compound according to claim 11 , wherein
n is an integer 1,
M is Pd, or Pt, and
m is 1.
14. The compound according to claim 11 , wherein L is a ligand of formula
wherein
A 21 , A 22 , A 23 , A 24 , R 42 , R 43 , R 44 and R 45 are as defined for c) in claim 11 .
15. The compound according to claim 11 , which is a compound of formula
wherein
is a bidentate ligand L,
L is as defined in claim 11 ,
n is 1,
M is Ir and m is 2, or
M is Pt and m is 1;
W is O, S, NR 4 , CR 5 R 6 ,
X is N or CH,
Y is O or NR 8 ;
R 1 , R 2 independently are selected from H, C 1 -C 8 alkyl, phenyl, halogen, C 1 -C 8 alkoxy, CN, NHR, NRR′;
or R 1 and R 2 together with the carbon atoms they are bonding to form an annellated phenyl ring, which optionally may be substituted;
R 3 is H, unsubstituted or substituted C 1 -C 8 alkyl, unsubstituted or substituted C 2 -C 8 alkenyl, unsubstituted or substituted phenyl;
R 4 , R 5 , R 6 independently are H or C 1 -C 8 alkyl;
R 8 is H, SO 2 —R 11 , CO—R 11 , where R 11 is C 1 -C 12 alkyl, C 1 -C 12 haloalkyl, phenyl, phenyl substituted by halogen; and
any substituent, if present, is selected from halogen, C 1 -C 8 alkyl, C 1 -C 8 alkoxy, COR, NHR, NRR′; and
R and R′ independently are selected from C 1 -C 6 alkyl, and R may also be hydrogen.
16. An organic electronic device comprising an emitting layer wherein the emitting layer comprises a compound according to claim 11 .
17. The organic electronic device according to claim 16 , which is an organic light emitting diode.
18. The device of claim 17 , further comprising a hole transport layer selected from the group consisting of polyvinyl-carbazol, N, N′-diphenyl-N, N′-bis(3-methylphenyl)-[1,1′-biphenyl]-4,4′-diamine (TPD), 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC), N,N′-bis(4-methylphenyl)-N,N′-bis(4-ethylphenyl)-[1,1′-(3,3′-dimethyl)biphenyl]4,4′-diamine (ETPD), tetrakis-(3-methylphenyl)-N,N,N′,N′-2,5-phenylenediamine (PDA), a-phenyl-4-N,N-diphenylaminostyrene (TPS), p-(diethylamino)benzaldehydediphenylhydrazone (DEH), triphenylamine (TPA), bis[4-(N,N-diethylamino)-2-methylphenyl](4-methylphenyl)methane (MPMP), 1-phenyl-3-[p-(diethylamino)styryl]-5-4)-(diethylamino)phenyllpyrazoline (PPR or DEASP), 1,2-trans-bis (9H-carbazol-9-yl)cyclobutane (DCZB), N,N,N′,N′-tetrakis (4-methylphenyl)-(1,1′-biphenyl)-4,4′-diamine (TTB), 4,4′-N,N-dicarbazole-biphenyl (CBP), N,N-dicarbazoyl-1,4-dimethene-benzene (DCB), porphyrinic compounds, and combinations thereof.
19. A stationary display or a mobile display comprising the organic light emitting diode according to claim 17 .
20. A method of using the compound according to claim 11 in an electronic device comprising:
adding the compound according to claim 11 in an emitting layer in the electronic device.