Rhodium and iridium complexes
View Patent ↗The present invention relates to novel organometallic compounds which are phosphorescence emitters. Compounds of this type can be used as active components (=functional materials) in a series of different types of, application which can be classed within the electronics industry in the broadest sense. The compounds according to the invention are described by the formulae (I), (Ia), (II), (IIa), (V), (VII), (IX), (XI), (XIII) and (XV).
1. A compound of the formula (I) or (II)
wherein
M is Rh or lr,
X is the same or different and is F, Cl, Br or I,
Y is the same or different and is 0, S or Se,
R is the same or different at each occurrence and is H, F, Cl, Br, NO 2 , CN, a straight-chain or branched or cyclic alkyl or alkoxy group which has from 1 to 20 carbon atoms and in which one or more nonadjacent CH 2 groups is optionally replaced by —O—, —S—, —NR 1 — or —CONR 2 — and in which one or more hydrogen atoms in said alkoxy group is optionally replaced by F, or an aryl or heteroaryl group having from 4 to 14 carbon atoms which is optionally substituted by one or more nonaromatic R radicals; and
a plurality of R substituents, either on the same ring or on the two different rings together in the same ligand in turn optionally encompasses a further monocyclic carbon ring system;
R 1 and R 2 are the same or different and are each H or an aliphatic or aromatic hydrocarbon radical having 1 to 20 carbon atoms,
a is the same or different and is 0, 1, 2, 3 or 4,
b is the same or different and is 0, 1, 2 or 3, and
n is 1, 2 or 3.
2. The compound as claimed in claim 1 , wherein
a is 0, 1 or 2 and
b is 0 or 1.
3. A compound of the formula (Ia) or (IIa)
wherein
M is Rh or Ir,
X is the same or different and is F, Cl, Br or I,
Y is the same or different and is 0, S or Se,
R is the same or different at each occurrence and is H, F, Cl, Br, NO 2 , CN, a straight-chain or branched or cyclic alkyl or alkoxy group which has from 1 to 20 carbon atoms and in which one or more nonadjacent CH 2 groups is optionally replaced by —O—, —S—, —NP 1 — or —CONR 2 — and in which one or more hydrogen atoms in said alkoxy group is optionally replaced by F, or an aryl or heteroaryl group having from 4 to 14 carbon atoms which is optionally substituted by one or more nonaromatic R radicals;
and a plurality of R substituents, either on the same ring or on the two different rings together in the same ligand in turn optionally encompasses a further monocyclic carbon ring system;
R 1 and R 2 are the same or different and are each H or an aliphatic or aromatic hydrocarbon radical having 1 to 20 carbon atoms,
a is the same or different and is 0, 1, 2, 3 or 4,
b is the same or different and is 0, 1, 2 or 3, and
n is 1, 2 or 3.
4. The compound as claimed in claim 3 , wherein
a is 0, 1 or 2 and
b is 0 or 1.
5. A compound of the formula (V) or (VII)
wherein
M is Rh or Ir,
X is F, Cl, Br or I,
Y is O, S or Se,
Z is F, Cl, Br, I, O—R 1 , S—R 1 or N(R 1 ) 2 ,
R is the same or different at each occurrence and is H, F, Cl, Br, NO 2 , CN, a straight-chain or branched or cyclic alkyl or alkoxy group which has from 1 to 20 carbon atoms and in which one or more nonadjacent CH 2 groups is optionally replaced by —O—, —S—, —NR 1 — or —CONR 2 — and in which one or more hydrogen atoms in said alkoxy group is optionally replaced by F, or an aryl or heteroaryl group having from 4 to 14 carbon atoms which is optionally substituted by one or more nonaromatic R radicals; and
a plurality of R substituents, either on the same ring or on the two different rings in the same ligand together in turn optionally encompasses a further monocyclic carbon ring system;
R 1 and R 2 are the same or different and are each H or an aliphatic or aromatic hydrocarbon radical having 1 to 20 carbon atoms,
a is 0, 1, 2, 3 or 4,
b is 0, 1, 2 or 3, and
p is 1 or 2.
6. The compound claimed in claim 5 , wherein
a is 0, 1 or 2 and
b is 0 or 1.
7. A compound of the formula (IX), (XI), (XIII) or (XV)
wherein
M is Rh or Ir,
X is F, Cl, Br or I,
Y is O, S or Se,
R is the same or different at each occurrence and is H, F, Cl, Br, NO 2 , CN, a straight-chain or branched or cyclic alkyl or alkoxy group which has from 1 to 20 carbon atoms and in which one or more nonadjacent CH 2 groups is optionally replaced by —O—, —S—, —NR 1 — or —CONR 2 — and in which one or more hydrogen atoms in said alkoxy group is optionally replaced by F, or an aryl or heteroaryl group having from 4 to 14 carbon atoms which is optionally substituted by one or more nonaromatic R radicals; and
a plurality of R substituents, either on the same ring or on the two different rings in the same ligand together in turn optionally encompasses a further monocyclic carbon ring system;
R 1 and R 2 are the same or different and are each H or an aliphatic or aromatic hydrocarbon radical having 1 to 20 carbon atoms,
L 1 is a neutral, monodentate ligand,
L 2 is a monoanionic, monodentate ligand,
L 3 is a neutral or mono- or dianionic bidentate ligand,
a is 0, 1, 2, 3 or 4,
b is 0, 1, 2, or 3,
m is 0, 1 or 2, and
p is 1 or 2.
8. The compound as claimed in claim 7 , wherein
a is 0, 1 or 2 and
b is 0 or 1.
9. The compound as claimed in claim 7 , wherein L 1 is carbon monoxide, an isonitrile, an amine, morpholine, a phosphine, a phosphite, an arsine, a stibine, or a nitrogen heterocycle.
10. The compound as claimed in claim 9 , wherein L 1 is tert-butylisonitrile, cyclohexylisonitrile, adamantylisonitrile, trimethylamine, triethylamine, trifluorophosphine, trimethylphosphine, tricyclohexylphosphine, tri-tert-butylphosphine, triphenylphosphine, tris(pentafluorophenyl)phosphine, trimethyl phosphite, triethyl phosphite, trifluoroarsine, trimethylarsine, tricyclohexylarsine, tri-tert-butylarsine, triphenylarsinine, tris(pentafluorophenyl)arsine, trifluorostibine, trimethylstibine, tricyclohexylstibine, tri-tert-butylstibine, triphenylstibine, tris(pentafluorophenyl)stibine pyridine, pyridazine, pyrazine or triazine.
11. The compound as claimed in claim 7 , wherein L 2 is a halide, cyanide, cyanate, isocyanate, thiocyanate, isothiocyanate, an alkoxide, a thioalkoxide, an amid, pyrrolide, morpholide, a carboxylate or an anionic nitrogen heterocycle.
12. The compound as claimed in claim 10 , wherein L 2 is methoxide, ethoxide, propoxide, iso-propoxide, tert-butoxide, phenoxide, methanethiolate, ethanethiolate, propanethiolate, iso-propanethiolate, tert-thiobutoxide, thiophenoxide, dimethylamide, diethylamide, di-iso-propylamide, acetate, trifluoroacetate, propionate, benzoate, pyrrolide, imidazolide or pyrazolide.
13. The compound as claimed in claim 7 , wherein L 3 is a diamine, an amine, a diimine, a heterocycle containing two nitrogen atoms, o-phenanthroline, a diphosphine, a 1,3-diketonate derived from 1,3-diketone, a 3-ketonate derived from 3-keto esters, a carboxylate derived from amino carboxylic acids, glycine, dimethylglycine, alanine, dimethylaminoalanine, a salicyliminate derived from salicylimine, a dialkoxide derived from dialcohols or a ditholate derived from dithiols.
14. The compound as claimed in claim 12 , wherein L 3 is ethylenediamine N,N,N′, N′-tetramethylethylenediamine, propylenediamine, N,N,N,′,N′-tetramethylpropylenediamine, cis-, trans-diaminocyclohexane, cis-, trans- N,N,N′,N′-tetramethyldiaminocyclohexane, 2[(1-(phenylimino)ethyl]pyridine, 2[(I-(2-methylphenylimino)-ethyl]pyridine, 2[(1-(2,6-di-iso-propylphenylimino)ethyl]pyridine, 2[(1-(methylimino)ethyl]pyridine, 2[(1-(ethylimino)ethyl]pyridine, 2[(1-(iso-propylimino)ethyl]pyridine, 2[(1-(tert-butylimino)ethyl]pyridine, 1,2-bis(methylimino)ethane, 1,2-bis(ethylimino)ethane, 1,2-bis(iso-propylimino)ethane, 1,2-bis(tert-butylimino)ethane, 2,3-bis(methylimino)butane, 2,3-bis(ethylimino)butane, 2,3-bis(iso-propylimino)butane, 2,3-bis(tert-butylimino)butane 1,2-(phenylimino)ethane, 1,2-bis(2-ethanemethylphenylimino)ethane, I2-bis(2,6di-iso-propylphenylimino, 1,2-bis(2,6-di-tert-butylphenylimino)ethane, 2,3-bis(phenylimino)butane, 2,3-bis(2-methylphenylimino)butane, 2,3-bis(2,6-di-iso-propylphenylimino)butane, 2,3-bis(2,6-di-tert-butylphenylimino)butane, 2,2′-bipyridine, bis(diphenylphosphino)methane, bis(diphenylphosphino)ethane, bis(diphenylphosphino)propane, bis(dimethylphosphino)methane, bis(dimethylphosphino)ethane, bis(dimethylphosphino)propane, bis(diethyl phosphino)methane, bis(diethylphosphino)ethane, bis(diethylphosphino)propane, bis(di-tert-buthylphosphino)methane, bis(di-tert-butylphosphino)ethane, bis(tert-butylphosphino)propane, acetylacetone, benzoylacetone, I 5-diphenylacetylacetone, dibenzoylmethane, bis(1,1,1-trifluoroacetyl)methane, ethyl acetoacetate, pyridine-2-carboxylic acid, quinoline-2-carboxylic acid, methylsalicylimine, ethylsalicylimine, phenylsalicylimine, ethylene glycol, 1,3-propylene glycol 1,2-ethylenedithiolate or 1,3-propylenedithiolate.
15. A process for preparing the compounds defined in claim 1 , which comprises reacting the compounds (III) or (IV)
wherein M and the radicals and indices Y, R, a and b are as defined in claim 1 with halogenating agents.
16. A process for preparing the compounds defined in claim 5 , which comprises reacting the compounds (VI) or (VIII)
wherein M and the radicals and indices Z, Y, R, a and b are as defined in claim 5 with halogenating agents.
17. A process for preparing the compounds defined in claim 7 , which comprises reacting the compounds (X), (XII), (XIV) or (XVI)
wherein M and the radicals and indices L 1 , L 2, L 3 , Y, R, a, b and m are as defined above in claim 7 with halogenating agents.
18. The process as claimed in claim 15 , wherein the halogenating agent used is a halogen X 2 or an interhalogen X—X and a base in a ratio of from 1:1 to 1:100, or an organic bromine complex, and in each case optionally a Lewis acid in a ratio (halogen to Lewis acid) of from 1:0.1 to 1:0.0001.
19. The process as claimed in claim 16 , wherein the halogenating agent used is a halogen X 2 or an interhalogen X—X and a base in a ratio of from 1:1 to 1:100, or an organic bromine complex, and in each case optionally a Lewis acid in a ratio (halogen to Lewis acid) of from 1:0,1 to 1:0.0001.
20. The process as claimed in claim 17 , wherein the halogenating agent used is a halogen X 2 or an interhalogen X—X and a base in a ratio of from 1:1 to 1:100, or an organic bromine complex, and in each case optionally a Lewis acid in a ratio (halogen to Lewis acid) of from 1:0.1 to 1:0,0001.
21. The process as claimed in claim 18 , wherein the halogen or interhalogen used is chlorine, bromine, iodine, chlorine fluoride, bromine fluoride, iodine fluoride, bromine chloride, iodine chloride or iodine bromide respectively and the organic bromine complex is pyridinium perbromide.
22. The process as claimed in claim 19 , wherein the halogen or interhalogen used is chlorine, bromine, iodine, chlorine fluoride, bromine fluoride, iodine fluoride, bromine chloride, iodine chloride or iodine bromide respectively and the organic bromine complex is pyridinium perbromide.
23. The process as claimed in claim 20 , wherein the halogen or interhalogen used is chlorine, bromine, iodine, chlorine fluoride, bromine fluoride, iodine fluoride, bromine chloride, iodine chloride or iodine bromide respectively and the organic bromine complex is pyridinium perbromide.
24. The process as claimed in claim 18 , wherein the base used is an organic amine or salts of carboxylic acids or inorganic bases.
25. The process as claimed in claim 19 , wherein the base used is an organic amine or salts of carboxylic acids or inorganic bases.
26. The process as claimed in claim 20 , wherein the base used is an organic amine or salts of carboxylic acids or inorganic bases.
27. The process as claimed in claim 24 , wherein the base used is triethylamine, tri-n-butylamine, diisopropylethylamine, morpholine, N-methylmorpholine, pyridine, sodium acetate, sodium propionate, sodium benzoate, sodium or potassium phosphate or hydrogenphosphate, sodium or potassium hydrogencarbonate, sodium or potassium carbonate.
28. The process as claimed in claim 25 , wherein the base used is triethylamine, tri-n-butylamine, diisopropylethylamine, morpholine, N-methylmorpholine, pyridine, sodium acetate, sodium propionate, sodium benzoate, sodium or potassium phosphate or hydrogenphosphate, sodium or potassium hydrogencarbonate, sodium or potassium carbonate.
29. The process as claimed in claim 26 , wherein the base used is triethylamine, tri-n-butylamine, diisopropylethylamine, morpholine, N-methylmorpholine, pyridine, sodium acetate, sodium propionate, sodium benzoate, sodium or potassium phosphate or hydrogenphosphate, sodium or potassium hydrogencarbonate, sodium or potassium carbonate.
30. The process as claimed in claim 18 , wherein said Lewis acid is used and is selected from the group consisting of boron trifluoride, boron trifluoride etherate, boron trichloride, boron tribromide, boron triiodide, aluminum trichloride, aluminum tribromide, aluminum triiodide, iron(III) chloride, iron(III) bromide, zinc(II) chloride, zinc(II) bromide, tin(IV) chloride, tin (IV) bromide, phosphorus pentachloride, arsenic pentachloride and antimony pentachloride.
31. The process as claimed in claim 19 , wherein said Lewis acid is used and is selected from the group consisting of boron trifluoride, boron trifluoride etherate, boron trichloride, boron tribromide, boron triiodide, aluminum trichloride, aluminum tribromide, aluminum triiodide, iron(III) chloride, iron(III) bromide, zinc(II) chloride, zinc(II) bromide, tin(IV) chloride, tin(IV)bromide, phosphorus pentachloride, arsenic pentachloride and antimony pentachloride.
32. The process as claimed in claim 20 , wherein said Lewis acid is used and is selected from the group consisting of boron trifluoride, boron trifluoride etherate, boron trichloride, boron tribromide, boron triiodide, aluminum trichloride, aluminum tribromide, aluminum triiodide, iron(III) chloride, iron (III)bromide, zinc(II) chloride, zinc(II) bromide, tin (IV) chloride, tin(IV)bromide, phosphorus pentachloride, arsenic pentachloride and antimony pentachloride.
33. The process as claimed in claim 15 , wherein the halogenating agent used is an organic N—X compound.
34. The process as claimed in claim 16 , wherein the halogenating agent used is an organic N—X compound.
35. The process as claimed in claim 17 , wherein the halogenating agent used is an organic N—X compound.
36. The process as claimed in claim 33 , wherein the organic N—X compound is 1-(chloromethyl)-4-fluoro-1,4-diazoniabicyclo[2.2.2]-octane bis(tetrafluoroborate), N-halocarboxamide, N-halocarboximide N-dihalosulfonamide or N-halosulfonamide salts.
37. The process as claimed in claim 34 , wherein the organic N—X compound is 1-(chloromethyl)-4-fluoro,1,4-diazoniabicyclo[2.2.2]-octane bis(tetrafluoroborate), N-halocarboxamide, N-halocarboximide, N-dihalosulfonamide or N-halosulfonamide salts.
38. The process as claimed in claim 35 , wherein the organic N—X compound is 1-(chloromethyl)-4-fluoro-1,4-diazoniabicyclo[2.2.2]-octane bis(tetrafluoroborate), N-halocarboxamide, N-halocarboximide, N-dihalosulfonamide or N-halosulfonamide salts.
39. The process as claimed in claim 15 , wherein the halogenating agent used is an organic O—X compound and halogens X 2 in a molar ratio of from 0.5:1 to 1:1.
40. The process as claimed in claim 16 , wherein the halogenating agent used is an organic O—X compound and halogens X 2 in a molar ratio of from 0.5:1 to 1:1.
41. The process as claimed in claim 17 , wherein the halogenating agent used is an organic O—X compound and halogens X 2 in a molar ratio of from 0.5:1 to 1:1.
42. The process as claimed in claim 39 , wherein the organic O—X compound used is iodoaryl dicarboxylate.
43. The process as claimed in claim 40 , wherein the organic O—X compound used is iodoaryl dicarboxylate.
44. The process as claimed in claim 41 , wherein the organic O—X compound used is iodoaryl dicarboxylate.
45. The process as claimed in claim 42 , wherein said iodoaryl dicarboxylate is iodobenzene diacetate or bistrifluoroacetoxyiodobenzene.
46. The process as claimed in claim 43 , wherein said iodoaryl dicarboxylate is iodobenzene diacetate or bistrifluoroacetoxyiodobenzene.
47. The process as claimed in claim 44 , wherein said iodoaryl dicarboxylate is iodobenzene diacetate or bistrifluoroacetoxyiodobenzene.
48. The process as claimed in claim 18 , wherein a stoichiometric ratio of the halogenating agents based on the content of active halogen, to the compounds (III) or (IV) of 1:1 is used.
49. The process as claimed in claim 19 , wherein a stoichiometric ratio of the halogenating agents based on the content of active halogen, to the compounds (VI) or (VIII) of 1:1 is used.
50. The process as claimed in claim 20 , wherein a stoichiometric ratio of the halogenating agents based on the content of active halogen, to the compounds (X), (XII), (XIV) or (XVI) of 1:1 is used.
51. The process as claimed in claim 33 , wherein a stoichiometric ratio of the halogenating agents based on the content of active halogen, to the compounds (III) or (IV) of 1:1 is used.
52. The process as claimed in claim 34 , wherein a stoichiometric ratio of the halogenating agents based on the content of active halogen, to the compounds (VI) or (VIII) of 1:1 is used.
53. The process as claimed in claim 35 , wherein a stoichiometric ratio of the halogenating agents based on the content of active halogen, to the compounds (X), (XII), (XIV) or (XVI) of 1:1 is used.
54. The process as claimed in claim 39 , wherein a stoichiometric ratio of the halogenating agents based on the content of active halogen, to the compounds (III) or (IV) 1:1 is used.
55. The process as claimed in claim 40 , wherein a stoichiometric ratio of the halogenating agents based on the content of active halogen, to the compounds (VI) or (VIII) of 1:1 is used.
56. The process as claimed in claim 41 , wherein a stoichiometric ratio of the halogenating agents based on the content of active halogen, to the compounds (X), (XII), (XIV) or (XVI) of 1:1 is used.
57. The process as claimed in claim 18 , wherein a stoichiometric ratio of the halogenating agents based ante content of active halogen, to the compounds (III) or (IV) of 2:1 is is used.
58. The process as claimed in claim 19 , wherein a stoichiometric ratio of the halogenating agents based on the content of active halogen, to the compounds (VI) or (VIII) of 2:1 is used.
59. The process as claimed in claim 20 , wherein a stoichiometric ratio of the halogenating agents based on the content of active halogen, to the compounds (X), (XII), (XIV) or (XVI) of 2:1 is used.
60. The process as claimed in claim 33 , wherein a stoichiometric ratio of the halogenating agents based on the content of active halogen, to the compounds (III) or (IV) of 2:1 of is used.
61. The process as claimed in claim 34 , wherein a stoichiometric ratio of the halogenating agents based on the content of active halogen, to the compounds (VI) or (VIII) of 2:1 is used.
62. The process as claimed in claim 35 , wherein a stoichiometric ratio of the halogenating agents based on the content of active halogen, to the compounds (X), (XII), (XIV) or (XVI) of 2:1 is used.
63. The process as claimed in claim 39 , wherein a stoichiometric ratio of the halogenating agents based on the content of active halogen, to the compounds (III) or (IV) of 2:1 is used.
64. The process as claimed in claim 40 , wherein a stoichiometric ratio of the halogenating agents based on the content of active halogen, to the compounds (VI) or (VIII) of 2:1 is used.
65. The process as claimed in claim 41 , wherein a stoichiometric ratio of the halogenating agents based on the content of active halogen, to the compounds (X), (XII), (XIV) or (XVI) of 2:1 is used.
66. The process as claimed in claim 18 , wherein a stoichiometric ratio of the halogenating agents based on the content of active halogen, to the compounds (III) or (IV) of 3:1 is used.
67. The process as claimed in claim 33 , wherein a stoichiometric ratio of the halogenating agents based on the content of active halogen, to compounds (III) or (IV) of 3:1 is used.
68. The process as claimed in claim 39 , wherein a stoichiometric ratio of the halogenating agents based on the content of active halogen, to compounds (III) or (IV) of 3:1 is used.
69. The process as claimed in claim 33 , wherein the organic N—X compound is N-chloroacetamide, N-bromoacetamide, N-iodoacetamide, N-chloropropionamide N-bromopropionamide, N-iodopropionamide, N-chlorobenzamide, N-bromobenzamide, N-iodobenzamide, N-chlorosuccinimide, N-bromosuccinimide, N-iodosuccinimide, N-chlorophthalimide, N-bromophthalimide, N-iodophthalimide, benzenesulfo-N-dibromamide, chloramine B or chloramine T.
70. The process as claimed in claim 34 , wherein the organic N—X compound is N-chloroacetamide, N-bromoacetamide, N-iodoacetamide, N-chloropropionamide, N-bromopropionamide, N-iodopropionamide, N-chlorobenzamide, N-bromobenzamide, N-iodobenzamide, N-chlorosuccinimide, N-bromosuccinimide, N-iodosuccinimide, N-chlorophthalimide, N-bromophthalimide, N-iodophthalimide, benzenesulfo-N-dibromamide, chloramine B or chloramine T.
71. The process as claimed in claim 35 , wherein the organic N—X compound is N-chloroacetamide, N-bromoacetamide, N-iodoacetamide, N-chloropropionamide, N-bromopropionamide, N-iodopropionamide, N-chlorobenzamide, N-bromobenzamide, N-iodobenzamide, N-chlorosuccinimide, N-bromosuccinimide, N-iodosuccinimide, N-chlorophthalimide, N-bromophthalimide, N-iodophthalimide, benzenesulfo-N-dibromamide, chloramine B or chloramine T.
72. The process as claimed in claim 19 , wherein a stoichiometric ratio of the halogenating agents based on the content of active halogen, to the compounds (VI) or (VIII) in the range from 4:1 to 1000:1 is used.
73. The process as claimed in claim 34 , wherein a stoichiometric ratio of the halogenating agents based on the content of active halogen, to the compounds (VI) or (VIII) in the range from 4:1 to 1000:1 is used.
74. The process as claimed in claim 40 , wherein a stoichiometric ratio of the halogenating agents based on the content of active halogen, to the compounds (VI) or (VIII) in the range from 4:1 to 1000:1 is used.
75. The compound as claimed in claim 1 , wherein the compound has a purity (determined by means of 1H NMR or HPLC) of more than 99%.
76. The compound as claimed in claim 3 , wherein the compound has a purity (determined by means of 1H NMR or HPLC) of more than 99%.
77. The compound as claimed in claim 5 , wherein the compound has a purity (determined by means of 1H NMR or HPLC) of more than 99%.
78. A conjugated or semiconjugated polymer containing one or more compounds of the formula (I) and/or (II)
and/or of the formula (Ia) and/or (IIa)
and/or of the formula (IX), (XI), (XIII) and/or (XV)
where the symbols and indices are defined as follows:
M is Rh or lr,
Y is the same or different and is O, S or Se,
R is the same or different at each occurrence and is H, F, Cl, Br, NO 2 , CN, a straight-chain or branched or cyclic alkyl or alkoxy group which has from 1 to 20 carbon atoms and in which one or more nonadjacent CH 2 groups is optionally replaced by —O—, —S—, —NR 1 — or —CONR 2 — and in which one or more hydrogen atoms in said alkoxy group is optionally replaced by F, or an aryl or heteroaryl group having from 4 to 14 carbon atoms which is optionally substituted by one or more nonaromatic R radicals; and
a plurality of R substituents, either on the same ring or on the two different rings together in the same ligand in turn optionally encompasses a further monocyclic carbon ring system;
R 1 and R 2 are the same or different and are H or an aliphatic or aromatic hydrocarbon radical having 1 to 20 carbon atoms,
L 1 is a neutral, monodentate ligand,
L 2 is a monoanionic, monodentate ligand,
L 3 is a neutral or mono- or dianionic bidentate ligand,
a is the same or different and is 0, 1, 2, 3 or 4,
b is the same or different and is 0, 1, 2 or 3,
n is 1, 2 or 3,
m is 0, 1 or 2,
p is 1 or 2, and
X is a bond to the conjugated or semiconjugated polymer.
79. The polymer as claimed in claim 78 , wherein the polymer is selected from the group consisting of polyfluorenes, poly-spiro-bifluorenes, poly-para-phenylenes, polycarbazoles and polythiophenes.
80. The polymer as claimed in claim 78 , wherein the polymer is a homo- or copolymer.
81. The polymer as claimed in claim 78 , wherein the polymer is soluble in organic solvents.
82. An electrical component comprising at least one polymer as claimed in claim 78 .
83. A compound of the formula (II)
wherein
M is Rh or lr,
X, is the same or different and is F, Cl, Br or I,
Y is the same or different and is 0, S or Se,
R is the same or different at each occurrence and is H, F, Cl, Br, NO 2 , CN, a straight-chain or branched or cyclic alkyl or alkoxy group which has from 1 to 20 carbon atoms and in which one or more nonadjacent CH 2 groups is optionally replaced by —O—, —S—, —NR 1 — or —CONR 2 — and in which one or more hydrogen atoms in said alkyl or alkoxy group is optionally replaced by F, or an aryl or heteroaryl group having from 4 to 14 carbon atoms which is optionally substituted by one or more nonaromatic R radicals; and
a plurality of R substituents, either on the same ring or on the two different rings in the same ligand together in turn optionally encompasses a further monocyclic carbon ring system;
R 1 and R 2 are the same or different and are each H or an aliphatic or aromatic hydrocarbon radical having 1 to 20 carbon atoms,
a is the same or different and is 0, 1, 2, 3 or 4, and
n is 1, 2 or 3.