Carbene metal complexes as OLED materials
First Claim
1. An organic light emitting device, comprising:
- (a) an anode;
(b) a cathode;
(c) an organic layer disposed between the anode and the cathode, wherein the organic layer comprises a compound further comprising one or more ligands coordinated to a metal center, and at least one ligand is a zwitterionic carbon donor ligand.
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Abstract
An organic light emitting device having an anode, a cathode and an organic layer disposed between the anode and the cathode is provided. In one aspect, the organic layer comprises a compound having at least one zwitterionic carbon donor ligand. In another aspect, the organic layer comprises a carbene compound, including the following:
In another aspect, the organic layer comprises a carbene compound, including:
In another aspect, the organic layer comprises a carbene compound that includes a triazole ring and has the structure:
In another aspect, the organic layer comprises a carbene compound that includes a tetrazole ring and has the structure:
88 Citations
61 Claims
-
1. An organic light emitting device, comprising:
-
(a) an anode;
(b) a cathode;
(c) an organic layer disposed between the anode and the cathode, wherein the organic layer comprises a compound further comprising one or more ligands coordinated to a metal center, and at least one ligand is a zwitterionic carbon donor ligand. - View Dependent Claims (2, 3, 4, 5)
-
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6. An organic light emitting device, comprising:
-
(a) an anode;
(b) a cathode;
(c) an organic layer disposed between the anode and the cathode, wherein the organic layer comprises a compound further comprising one or more carbene ligands coordinated to a metal center, and the compound has the structure;
and wherein M is a metal;
R1 and R2 are independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, CN, CF3, CO2R′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, SO3R′
, halo, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group;
R3 is independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group; and
additionally or alternatively, two R groups on the same or adjacent ring, together form independently a 5 or 6-member cyclic group, wherein said cyclic group is cycloalkyl, cycloheteroalkyl, aryl, or heteroaryl; and
wherein said cyclic group is optionally substituted by one or more substituents J;
each substituent J is independently selected from the group consisting of R′
, CN, CF3, C(O)OR′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, or SO3R′
, and additionally, or alternatively, two J groups on adjacent ring atoms form a fused 5- or 6-membered aromatic group;
each R′
is independently selected from halo, H, alkyl, alkenyl, alkynyl, heteroalkyl, aralkyl, aryl, and heteroaryl;
(X-Y) is selected from a photoactive ligand or an ancillary ligand, α
is 0, 1, 2, 3, or 4;
b is 0, 1, 2, or 3;
m is a value from 1 to the maximum number of ligands that may be attached to metal M;
m+n is the maximum number of ligands that may be attached to metal M. - View Dependent Claims (7, 8, 9)
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10. An organic light emitting device, comprising:
-
(a) an anode;
(b) a cathode;
(c) an organic layer disposed between the anode and the cathode, wherein the organic layer comprises a compound further comprising one or more carbene ligands coordinated to a metal center, and wherein the compound has the structure;
wherein M is a metal;
ring D is independently an aromatic cyclic, heterocyclic, fused cyclic, or fused heterocyclic ring, wherein ring D can be optionally substituted with one or more substituents R2;
R1 and R2 are independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, CN, CF3, CO2R′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, SO3R′
, halo, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group;
R3 is independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group; and
additionally or alternatively, two R groups on the same or adjacent ring, together form independently a 5 or 6-member cyclic group, wherein said cyclic group is cycloalkyl, cycloheteroalkyl, aryl, or heteroaryl; and
wherein said cyclic group is optionally substituted by one or more substituents J;
each substituent J is independently selected from the group consisting of R′
, CN, CF3, C(O)OR′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, or SO3R′
, and additionally, or alternatively, two J groups on adjacent ring atoms form a fused 5- or 6-membered aromatic group;
each R′
is independently selected from halo, H, alkyl, alkenyl, alkynyl, heteroalkyl, aralkyl, aryl, and heteroaryl;
Z1 and Z2 are independently selected from a bond, O, S, or NR′
;
A1, A2, A′
, and A″
is independently selected from C, N, or P;
(X-Y) is selected from a photoactive ligand or an ancillary ligand;
α
is 0, 1, 2, 3, or 4;
b is 0, 1, 2, or 3;
m is a value from 1 to the maximum number of ligands that may be attached to metal M;
m+n is the maximum number of ligands that may be attached to metal M. - View Dependent Claims (11, 12, 13, 14, 15)
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16. An organic light emitting device, comprising:
-
(a) an anode;
(b) a cathode;
(c) an organic layer disposed between the anode and the cathode, wherein the organic layer comprises a compound further comprising one or more carbene ligands coordinated to a metal center, and wherein the compound has the structure;
wherein M is a metal;
ring D is an aromatic cyclic, heterocyclic, fused cyclic, or fused heterocyclic ring with at least one carbon atom coordinated to metal M;
wherein ring D can be optionally substituted with one or more substituents R2; and
R1 and R2 are independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, CN, CF3, CO2R′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, SO3R′
, halo, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group;
R3 is independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group; and
additionally or alternatively, two R groups on the same or adjacent ring, together form independently a 5 or 6-member cyclic group, wherein said cyclic group is cycloalkyl, cycloheteroalkyl, aryl, or heteroaryl; and
wherein said cyclic group is optionally substituted by one or more substituents J;
each substituent J is independently selected from the group consisting of R′
, CN, CF3, C(O)OR′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, or SO3R′
, and additionally, or alternatively, two J groups on adjacent ring atoms form a fused 5- or 6-membered aromatic group;
each R′
is independently selected from halo, H, alkyl, alkenyl, alkynyl, heteroalkyl, aralkyl, aryl, and heteroaryl;
α
is 0, 1, 2, 3, or 4;
c is 0, 1, or 2. - View Dependent Claims (17, 18, 19, 20, 21)
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22. An organic light emitting device, comprising:
-
(a) an anode;
(b) a cathode;
(c) an organic layer disposed between the anode and the cathode, wherein the organic layer comprises a compound further comprising one or more carbene ligands coordinated to a metal center, and wherein the compound has the structure;
wherein M is a metal;
ring D is an aromatic cyclic, heterocyclic, fused cyclic, or fused heterocyclic ring with at least one carbon atom coordinated to metal M; and
wherein ring D can be optionally substituted with one or more substituents R2;
R2 is independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, CN, CF3, CO2R′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, SO3R′
, halo, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group;
R3 is independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group; and
additionally or alternatively, two R groups on the same or adjacent ring, together form independently a 5 or 6-member cyclic group, wherein said cyclic group is cycloalkyl, cycloheteroalkyl, aryl, or heteroaryl; and
wherein said cyclic group is optionally substituted by one or more substituents J;
each substituent J is independently selected from the group consisting of R′
, CN, CF3, C(O)OR′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, or SO3R′
, and additionally, or alternatively, two J groups on adjacent ring atoms form a fused 5- or 6-membered aromatic group;
each R′
is independently selected from halo, H, alkyl, alkenyl, alkynyl, heteroalkyl, aralkyl, aryl, and heteroaryl;
α
is 0, 1, 2, 3, or 4. - View Dependent Claims (23, 24, 25, 26)
-
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27. An organic light emitting device, comprising:
-
(a) an anode;
(b) a cathode;
(c) an organic layer disposed between the anode and the cathode, wherein the organic layer comprises a zwitterionic carbon donor ligand. - View Dependent Claims (28, 29)
-
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30. An organic light emitting device, comprising:
-
(a) an anode;
(b) a cathode;
(c) an organic layer disposed between the anode and the cathode, wherein the organic layer comprises a carbene ligand having the structure;
wherein ring D is independently an aromatic cyclic, heterocyclic, fused cyclic, or fused heterocyclic ring, wherein ring D can be optionally substituted with one or more substituents R2;
R1 and R2 are independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, CN, CF3, CO2R′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, SO3R′
, halo, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group;
R3 is independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group; and
additionally or alternatively, two R groups on the same or adjacent ring, together form independently a 5 or 6-member cyclic group, wherein said cyclic group is cycloalkyl, cycloheteroalkyl, aryl, or heteroaryl; and
wherein said cyclic group is optionally substituted by one or more substituents J;
each substituent J is independently selected from the group consisting of R′
, CN, CF3, C(O)OR′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, or SO3R′
, and additionally, or alternatively, two J groups on adjacent ring atoms form a fused 5- or 6-membered aromatic group;
each R′
is independently selected from halo, H, alkyl, alkenyl, alkynyl, heteroalkyl, aralkyl, aryl, and heteroaryl;
Z1 and Z2 are independently selected from a bond, O, S, or NR′
;
A1, A2, A′
, and A″
is independently selected from C, N, or P;
α
is 0, 1, 2, 3, or 4;
b is 0, 1, 2, or 3. - View Dependent Claims (31, 32)
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33. An organic light emitting device, comprising:
-
(a) an anode;
(b) a cathode;
(c) an organic layer disposed between the anode and the cathode, wherein the organic layer comprises a carbene ligand having the structure;
wherein ring D is an aromatic cyclic, heterocyclic, fused cyclic, or or fused heterocyclic ring;
wherein ring D can be optionally substituted with one or more substituents R2; and
R1 and R2 are independently selected from hydrogen, alkyl, alkenyl, alkynyl, alkyl, CN, CF3, CO2R′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, SO3R′
, halo, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group;
R3 is independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group; and
additionally or alternatively, two R groups on the same or adjacent ring, together form independently a 5 or 6-member cyclic group, wherein said cyclic group is cycloalkyl, cycloheteroalkyl, aryl, or heteroaryl; and
wherein said cyclic group is optionally substituted by one or more substituents J;
each substituent J is independently selected from the group consisting of R′
, CN, CF3, C(O)OR′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, or SO3R′
, and additionally, or alternatively, two J groups on adjacent ring atoms form a fused 5- or 6-membered aromatic group;
each R′
is independently selected from halo, H, alkyl, alkenyl, alkynyl, heteroalkyl, aralkyl, aryl, and heteroaryl;
α
is 0, 1, 2, 3, or 4;
c is 0, 1, or 2. - View Dependent Claims (34, 35)
-
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36. An organic light emitting device, comprising:
-
(a) an anode;
(b) a cathode;
(c) an organic layer disposed between the anode and the cathode, wherein the organic layer comprises a carbene ligand having the structure;
wherein ring D is an aromatic cyclic, heterocyclic, fused cyclic, or fused heterocyclic ring;
wherein ring D can be optionally substituted with one or more substituents R2; and
R1 and R2 are independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, CN, CF3, CO2R′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, SO3R′
, halo, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group;
R3 is independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group; and
additionally or alternatively, two R groups on the same or adjacent ring, together form independently a 5 or 6-member cyclic group, wherein said cyclic group is cycloalkyl, cycloheteroalkyl, aryl, or heteroaryl; and
wherein said cyclic group is optionally substituted by one or more substituents J;
each substituent J is independently selected from the group consisting of R′
, CN, CF3, C(O)OR′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, or SO3R′
, and additionally, or alternatively, two J groups on adjacent ring atoms form a fused 5- or 6-membered aromatic group;
each R′
is independently selected from halo, H, alkyl, alkenyl, alkynyl, heteroalkyl, aralkyl, aryl, and heteroaryl;
α
is 0, 1, 2, 3, or 4. - View Dependent Claims (37)
-
-
38. A compound selected from the group consisting of:
wherein M is a metal; and
R1 and R2 are independently selected from hydrogen, allyl, alkenyl, alkynyl, aralkyl, CN, CF3, CO2R′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, SO3R′
, halo, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group;
R3 is independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group; and
additionally or alternatively, two R groups on the same or adjacent ring, together form independently a 5 or 6-member cyclic group, wherein said cyclic group is cycloalkyl, cycloheteroalkyl, aryl, or heteroaryl; and
wherein said cyclic group is optionally substituted by one or more substituents J;
each substituent J is independently selected from the group consisting of R′
, CN, CF3, C(O)OR′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, or SO3R′
, and additionally, or alternatively, two J groups on adjacent ring atoms form a fused 5- or 6-membered aromatic group;
each R′
is independently selected from halo, H, alkyl, alkenyl, alkynyl, heteroalkyl, aralkyl, aryl, and heteroaryl;
(X-Y) is selected from a photoactive ligand or an ancillary ligand, α
is 0, 1, 2, 3, or 4;
b is 0, 1, 2, or 3;
m is a value from 1 to the maximum number of ligands that may be attached to metal M;
m+n is the maximum number of ligands that may be attached to metal M. - View Dependent Claims (39, 40)
-
41. A compound, selected from the group consisting of:
wherein M is a metal; and
R1 and R2 are independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, CN, CF3, CO2R′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, SO3R′
, halo, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group;
R3 is independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group; and
additionally or alternatively, two R groups on the same or adjacent ring, together form independently a 5 or 6-member cyclic group, wherein said cyclic group is cycloalkyl, cycloheteroalkyl, aryl, or heteroaryl; and
wherein said cyclic group is optionally substituted by one or more substituents J;
each substituent J is independently selected from the group consisting of R′
, CN, CF3, C(O)OR′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, or SO3R′
, and additionally, or alternatively, two J groups on adjacent ring atoms form a fused 5- or 6-membered aromatic group;
each R′
is independently selected from halo, H, alkyl, alkenyl, alkynyl, heteroalkyl, aralkyl, aryl, and heteroaryl;
(X-Y) is selected from a photoactive ligand or an ancillary ligand, α
is 0, 1, 2, 3, or 4;
b is 0, 1, 2, or 3;
m is a value from 1 to the maximum number of ligands that may be attached to metal M;
m+n is the maximum number of ligands that may be attached to metal M. - View Dependent Claims (42, 43, 44)
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45. A compound comprising one or more carbene ligands coordinated to a metal center, wherein the compound has the structure:
-
wherein M is a metal;
ring D is independently an aromatic cyclic, heterocyclic, fused cyclic, or fused heterocyclic ring, wherein ring D can be optionally substituted with one or more substituents R2;
R1 and R2 are independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, CN, CF3, CO2R′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, SO3R′
, halo, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group;
R3 is independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group; and
additionally or alternatively, two R groups on the same or adjacent ring, together form independently a 5 or 6-member cyclic group, wherein said cyclic group is cycloalkyl, cycloheteroalkyl, aryl, or heteroaryl; and
wherein said cyclic group is optionally substituted by one or more substituents J;
each substituent J is independently selected from the group consisting of R′
, CN, CF3, C(O)OR′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, or SO3R′
, and additionally, or alternatively, two J groups on adjacent ring atoms form a fused 5- or 6-membered aromatic group;
each R′
is independently selected from halo, H, alkyl, alkenyl, alkynyl, heteroalkyl, aralkyl, aryl, and heteroaryl;
Z1 and Z2 are independently selected from a bond, O, S, or NR′
;
A1, A2, A′
, and A″
is independently selected from C, N, or P;
(X-Y) is selected from a photoactive ligand or an ancillary ligand;
α
is 0, 1, 2, 3, or 4;
b is 0, 1, 2, or 3;
m is a value from 1 to the maximum number of ligands that may be attached to metal M;
m+n is the maximum number of ligands that may be attached to metal M. - View Dependent Claims (46, 47, 48, 49, 50)
wherein c is 0, 1, or 2.
-
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47. The compound of claim 46, wherein the compound is selected from the group consisting of:
wherein c is 0, 1, or 2.
-
48. The compound of claim 47, wherein M is selected from the group consisting of ir, Pt, Pd, Rh, Re, Ru, Os, Tl, Pb, Bi, In, Sn, Sb, Te, Al, Ga, Au, and Ag.
-
49. The compound of claim 48, wherein M is Ir.
-
50. The compound of claim 49, wherein m is 3 and n is 0.
-
51. A compound comprising one or more carbene ligands coordinated to a metal center, wherein the compound has the structure:
-
wherein M is a metal;
ring D is an aromatic cyclic, heterocyclic, fused cyclic, or fused heterocyclic ring with at least one carbon atom coordinated to metal M;
wherein ring D can be optionally substituted with one or more substituents R2; and
R1 and R2 are independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, CN, CF3, CO2R′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, SO3R′
, halo, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group;
R3 is independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group; and
additionally or alternatively, two R groups on the same or adjacent ring, together form independently a 5 or 6-member cyclic group, wherein said cyclic group is cycloalkyl, cycloheteroalkyl, aryl, or heteroaryl; and
wherein said cyclic group is optionally substituted by one or more substituents J;
each substituent J is independently selected from the group consisting of R′
, CN, CF3, C(O)OR′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, or SO3R′
, and additionally, or alternatively, two J groups on adjacent ring atoms form a fused 5- or 6-membered aromatic group;
each R′
is independently selected from halo, H, alkyl, alkenyl, alkynyl, heteroalkyl, aralkyl, aryl, and heteroaryl;
α
is 0, 1, 2, 3, or 4;
c is 0, 1, or 2.- View Dependent Claims (52, 53, 54, 55, 56)
-
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53. The compound of claim 52, selected from the group consisting of:
-
54. The compound of claim 53, wherein M is selected from the group consisting of Ir, Pt, Pd, Rh, Re, Ru, Os, Tl, Pb, Bi, In, Sn, Sb, Te, Al, Ga, Au, and Ag.
-
55. The compound of claim 54, wherein M is Ir.
-
56. The compound of claim 55, wherein m is 3 and n is 0.
-
57. A compound comprising one or more carbene ligands coordinated to a metal center, wherein the compound has the structure:
-
wherein M is a metal;
ring D is an aromatic cyclic, heterocyclic, fused cyclic, or fused heterocyclic ring with at least one carbon atom coordinated to metal M; and
wherein ring D can be optionally substituted with one or more substituents R2;
R2 is independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, CN, CF3, CO2R′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, SO3R′
, halo, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group;
R3 is independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group; and
additionally or alternatively, two R groups on the same or adjacent ring, together form independently a 5 or 6-member cyclic group, wherein said cyclic group is cycloalkyl, cycloheteroalkyl, aryl, or heteroaryl; and
wherein said cyclic group is optionally substituted by one or more substituents J;
each substituent J is independently selected from the group consisting of R′
, CN, CF3, C(O)OR′
, C(O)R′
, C(O)NR′
2, NR′
2, NO2, OR′
, SR′
, SO2, SOR′
, or SO3R′
, and additionally, or alternatively, two J groups on adjacent ring atoms form a fused 5- or 6-membered aromatic group;
each R′
is independently selected from halo, H, alkyl, alkenyl, alkynyl, heteroalkyl, aralkyl, aryl, and heteroaryl;
α
is 0, 1, 2, 3, or 4.- View Dependent Claims (58, 59, 60, 61)
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59. The compound of claim 58, wherein M is selected from the group consisting of Ir, Pt, Pd, Rh, Re, Ru, Os, Tl, Pb, Bi, hi, Sn, Sb, Te, Al, Ga, Au, and Ag.
-
60. The compound of claim 59, wherein M is Ir.
-
61. The compound of claim 60, wherein m is 3 and n is 0.
Specification