WO2007065523A1 - Verfahren zur herstellung ortho-metallierter metallverbindungen - Google Patents
Verfahren zur herstellung ortho-metallierter metallverbindungen Download PDFInfo
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- WO2007065523A1 WO2007065523A1 PCT/EP2006/010740 EP2006010740W WO2007065523A1 WO 2007065523 A1 WO2007065523 A1 WO 2007065523A1 EP 2006010740 W EP2006010740 W EP 2006010740W WO 2007065523 A1 WO2007065523 A1 WO 2007065523A1
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- C07F15/00—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
- C07F15/0006—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table compounds of the platinum group
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- C07F15/00—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
- C07F15/0006—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table compounds of the platinum group
- C07F15/0046—Ruthenium compounds
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- C07F15/00—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
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- C07F15/006—Palladium compounds
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- C07F15/00—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
- C07F15/0006—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table compounds of the platinum group
- C07F15/0073—Rhodium compounds
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- C07F15/00—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
- C07F15/0006—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table compounds of the platinum group
- C07F15/0086—Platinum compounds
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- H10K85/30—Coordination compounds
- H10K85/341—Transition metal complexes, e.g. Ru(II)polypyridine complexes
- H10K85/342—Transition metal complexes, e.g. Ru(II)polypyridine complexes comprising iridium
Definitions
- the present invention describes a method for producing homoleptic and heteroleptic tris-ortho-metallated metal compounds from simple starting compounds.
- Organometallic compounds are used as functional materials in a number of different applications that can be broadly attributed to the electronics industry.
- a development for this is the use of organometallic complexes which show phosphorescence instead of fluorescence (MA Baldo et al., Appl. Phys. Leu. 1999, 75, 4-6).
- organometallic compounds For spin-statistical reasons, up to four times the energy and power efficiency is possible using organometallic compounds. This development seems to prevail over singlet emitters, at least for red and green emissions. This requires efficient chemical-synthetic access to the corresponding, high-purity organometallic compounds. This is particularly important when considering the rarity of the late transition metals Rh, Ir, Pd and Pt for the resource-saving use of the mentioned class of compounds.
- K. Dedeian et al. describe a process starting from iridium (III) tris (acetylacetonate) and 2-phenylpyridine, according to which fac-tris [2- (2-pyridinyl- ⁇ N) phenyl- ⁇ C] -iridium (III) was obtained in 45% yield .
- the product must be cleaned of impurities by chromatographic processes, halogenated hydrocarbons being used here (K. Dedeian, PI Djurovich, FO Garces, G. Carlson, RJ Watts, Inorg. Chem. 1991, 30, 1685- 1687).
- di- ⁇ -chlorotetrakis [2- (2-pyridinyl- ⁇ N) phenyl- ⁇ C] di-iridium (III), which is initially obtained in approximately 72% yield from hydrated lridium (III) chloride and 2 Phenylpyridine is shown (S. Spouse, KA King, PJ Spellane, RJ Watts, J. Am. Chem. Soc. 1984, 106, 6647-6653), used as starting material.
- Reaction temperature of about 200 0 C gives it the facial iridium complex while maintaining a reaction temperature of 140-145 0 C gives the meridional iridium complex.
- the yield is between 65 and 80% in both cases. In both cases, product mixtures are formed from which the pure complexes have to be isolated by chromatography, so that this process is not technically meaningful to use.
- WO 04/099223 describes a process for producing tris-ortho-metalated iridium complexes by reacting the ligand with iridium halide in Presence of a silver, mercury, aluminum or antimony salt described.
- metal salts in particular silver salts, is disadvantageous because metal traces can hardly be removed from the product and have a negative effect on the optoelectronic properties of the iridium complexes.
- Arylpyridine-type ligands are described in the presence of an auxiliary ligand which is capable of breaking the metal-halogen bond.
- Pyridines, triarylphosphines and keto-ketonates are described as auxiliary ligands.
- the synthesis can also be carried out in two stages in a one-pot process from the metal halide.
- Protic solvents, in particular ethylene glycol, are used as solvents, and the reaction is carried out under reflux (in ethylene glycol at about 197 ° C.).
- a 60% yield is obtained over two stages, starting from IrCl 3 .
- An improvement in the yield would be desirable here.
- this process has the disadvantage that it is carried out under drastic conditions (3 days reflux at 197 ° C.).
- JP 2004/238379 describes a process for the synthesis of iridium complexes by reacting [L 2 IrHaI] 2 with a further ligand in
- An inorganic base, an alkali metal alkoxide or an organic amine is preferably used as the base.
- Polar solvents in particular, are used as solvents
- the only embodiment describes the synthesis using triethanolamine as the base in ethylene glycol using microwave radiation.
- this procedure can be used to selectively obtain both the facial and the otherwise difficult to access meridional iridium complexes.
- the meridional can also change into the corresponding facial
- the invention relates to a process for the preparation of metal complexes of the formula (1),
- M is Rh, Ir, Pd or Pt
- DCy is the same or different cyclic each time it occurs
- R be connected to each other
- CCy is the same or different cyclic at every occurrence
- R is the same or different with each occurrence F, Cl 1 Br, I,
- R 2 is the same or different H, F, Cl, Br, I,
- X is the same or different for each occurrence F 1 Cl, Br or
- Y is the same or different with each occurrence an alkali metal cation, an alkaline earth metal cation, an ammonium cation, a tetraalkylammonium cation with 4 to 40 C atoms or a tetraalkylphosphonium cation with 4 to 40 C atoms;
- n corresponds to the charge of M for a monovalent cation Y and corresponds to half the charge of M for a divalent cation Y;
- z is 0 to 100;
- y is 0 to 100; with a compound of formula (5),
- Solvent mixture of at least one organic solvent and at least 2 vol .-% water is carried out.
- Cyclic in the sense of this invention means both monocyclic and also bicyclic or polycyclic.
- radicals form a ring system with one another
- condensed aromatic or non-aromatic systems can be formed therefrom.
- residues which are bonded to different groups for example to CCy and DCy, can form a ring system with one another.
- C 4 o-alkyl group in which individual H atoms or CH 2 groups can also be substituted by the abovementioned groups, particularly preferably the radicals methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl , s-butyl, t-butyl, 2-methylbutyl, n-pentyl, s-pentyl, cyclopentyl, n-hexyl,
- a Cr to C 4 o-alkoxy group particularly preferably means methoxy, ethoxy, n-propoxy, i-propoxy, n-butoxy, i-butoxy, s-butoxy, t-butoxy or 2-methylbutoxy.
- An aromatic or heteroaromatic ring system with 1 to 30 aromatic ring atoms which can in each case still be substituted with the above-mentioned radicals R 2 or R 3 and which can be linked via any positions on the aromatic or heteroaromatic, are understood in particular to be groups which are derived from benzene, naphthalene, anthracene, phenanthrene, pyrene, chrysene, perylene, fluoranthene, tetracene, pentacene, benzpyrene, biphenyl, biphenylene, terphenyl, terphenylene, fluorene, spirobifluorene, truxene,
- Phenanthridine benzo-5,6-quinoline, benzo-6,7-quinoline, benzo-7,8-quinoline, phenothiazine, phenoxazine, pyrazole, indazole, imidazole, benzimidazole, naphthimidazole, phenanthrimidazole, pyridimidazole, pyrazine imidazole, quinoxalinimidazole , Benzoxazole, naphthoxazole, anthroxazole, phenanthroxazole, isoxazole, 1, 2-thiazole, 1, 3-thiazole, benzothiazole,
- homoleptic and heteroleptic metal complexes can be synthesized.
- a homoleptic complex is understood to mean a compound in which only the same ligands are bound to a metal.
- Complexes are those in which different ligands are bound to the metal. This applies both to ligands with a different basic ligand structure and to ligands which have the same basic structure but which are substituted differently. If a compound of the formula (2) or a compound of the formula (3) is reacted with a compound of the formula (5), homoleptic metal complexes generally result. If a compound of the formula (4) is reacted with a similar ligand of the formula (5), homoleptic metal complexes also generally arise. Will one
- Preferred octahedral heteroleptic metal complexes are those which contain two identical ligands and a third different ligand.
- both the facial and the meridional octahedral complexes are selectively accessible by the process according to the invention.
- Facial or meridional coordination in the sense of this application describes the octahedral environment of the metal M with the six donor atoms. Facial coordination occurs when three identical donor atoms have a triangular surface in the (pseudo) octahedral coordination polyhedron and three identical but different donor atoms have a different triangular surface in the (pseudo) octahedral
- Occupy coordination polyhedra In merdional coordination, three identical donor atoms occupy one meridian in the (pseudo) - octahedral coordination polyhedron and three identical but different donor atoms occupy the other meridian in (pseudo) - octahedral coordination polyhedra. This is shown below using the coordination of three N donor atoms and three C donor atoms as an example (Scheme 1). Because this definition refers to donor atoms and not to the CCy and DCy cycles that provide these donor atoms, the three CCy and the three DCy cycles can be the same or different with each occurrence and still be a facial or
- Identical donor atoms are understood to be those which consist of the same elements (e.g. carbon or nitrogen), regardless of whether these elements are built into different structures.
- This definition can also be applied to metal complexes which generally contain three neutral and three anionic coordinating atoms, so that this definition can also be used if, for example, a ligand has a neutral and an anionic one
- facial coordination meridional coordination Preferred metal educts according to the invention are those in which the symbol M stands for iridium or platinum, in particular for iridium.
- Preferred compounds of the formula (2) are those in which the index z is 1 to 10, particularly preferably 1 to 3.
- Preferred compounds of the formula (2) are also those in which the index y is 0 to 10, particularly preferably represents 0 to 3.
- Preferred compounds of the formula (3) are those in which the index z is 0 to 10, particularly preferably 0 to 3.
- Preferred compounds of the formula (3) are also those in which the index y represents 0 to 10, particularly preferably 0 to 3, very particularly preferably 0.
- the indices z and y need not be integers, since the complexes can also contain non-stoichiometric amounts of water and HX.
- the water content in particular can fluctuate depending on the batch, since it is hygroscopic metal salts. However, the proportion of water in the starting product has no influence on the reaction, since a larger amount of water is added to the reaction mixture.
- Preferred metal educts of formulas (2), (3) and (4) are furthermore those in which the symbol X is the same or different in each
- ligands are those in which the symbol CCy, identical or different on each occurrence, stands for an aromatic or heteroaromatic group with 5 to 20 aromatic ring atoms which can carry one or more substituents R.
- the aromatic or heteroaromatic group CCy can also be condensed.
- the uncoordinated ligand must have an unsubstituted carbon atom or an NH group in at least one ortho position to bind DCy, which can then bind to the metal.
- the group CCy particularly preferably binds to the metal via a carbon atom.
- Preferred aromatic groups CCy are those with 6 to 20 C atoms, preferably 6 to 14 C atoms, particularly preferably 6 or 10 C atoms, which can also be substituted by one or more R groups.
- Very particularly preferred aromatic groups are phenyl, naphthyl, anthryl, fluorenyl and phenanthrenyl, in particular phenyl and naphthyl, which can each be substituted by one or more radicals R.
- Preferred heteroaromatic groups CCy are those with at least one heteroatom and at least two C atoms, the sum of heteroatoms and C atoms having to be at least 5.
- the heteroatoms are preferably selected from N, S and / or O.
- Preferred heteroaromatic groups contain 5 to 14 aromatic ring atoms, particularly preferably 5, 6, 9 or 10 aromatic ring atoms.
- Especially preferred heteroaromatic groups are derived from thiophene, pyrrole, furan, imidazole, pyrazole, pyridine, pyrazine, pyrimidine, pyridazine, benzothiophene, indole, carbazole, benzofuran, quinoline, isoquinoline or quinoxaline, each of which can be substituted by one or more radicals R.
- Preferred ligands are also those in which the symbol DCy, the same or different on each occurrence, stands for a cyclic group with 5 to 20 ring atoms, which contains a neutral nitrogen atom in the ortho position to the bond of CCy as donor atom.
- the nitrogen is preferably either bound in an imine functionality or part of a heteroaromatic system.
- the cycle DCy contains at least one nitrogen atom and at least two carbon atoms, the sum of all heteroatoms and carbon atoms having to be at least 5.
- DCy preferably contains 5 to 20 aromatic ring atoms, particularly preferably 5 to 14 aromatic ring atoms, very particularly preferably 5, 6, 9 or 10 aromatic ring atoms.
- Particularly preferred cycles DCy are selected from pyridine, quinoline, isoquinoline, quinoxaline, benzopyrimidine, 2-azaanthracene, phenanthridine, oxazole, thiazole, benzoxazole or benzothiazole, in particular pyridine, quinoline, isoquinoline or benzopyrimidine, each of which has one or more R radicals can be substituted.
- the reaction is carried out with the addition of a salt which contains at least two oxygen atoms.
- the salt can be both organic and inorganic salts.
- Zwitterionic compounds are also salts in the sense of this invention and are suitable for the process according to the invention.
- At least one of the oxygen atoms is preferably negatively charged.
- the oxygen atoms are furthermore preferably bonded in a 1, 3, 1, 4 or 1, 5 arrangement in the salt (Scheme 2, where also
- Binding to central atoms other than carbon is possible, for example to sulfur, nitrogen or phosphorus), that is to say they preferably bind to the same central atom (1, 3 arrangement), to neighboring central atoms (1, 4 arrangement) or to the next but one Central atom (1, 5 arrangement).
- the oxygen atoms in are particularly preferred the salt bound in a 1, 3 or 1, 4 arrangement, very particularly preferably in a 1, 3 arrangement. It is also possible that the salt is formed in situ by adding a base.
- An inner salt or a zwitterion in the sense of this invention is understood to mean a compound which contains at least one anionic group which contains at least two oxygen atoms and which contains at least one cationic group in the same molecule.
- Such an inner salt can, for example, result in an intramolecular acid-base reaction between an acidic group and a basic group in the same molecule, for example between a carboxylic acid group and an amino group in an aminocarboxylic acid.
- Preferred inorganic salts are alkali metal, alkaline earth metal, ammonium, tetraalkylammonium, tetraalkylphosphonium and / or tetraarylphosphonium salts of carbonate, hydrogen carbonate, sulfate, hydrogen sulfate, sulfite, hydrogen sulfite, nitrate, nitrite, phosphate, hydrogen phosphate, dihydrogen phosphate, in particular, borate phosphate the alkali, ammonium and tetraalkylammonium salts. They are in all of these salts
- Oxygen atoms bound in a 1, 3 arrangement Oxygen atoms bound in a 1, 3 arrangement.
- Preferred organic salts are the alkali metal, alkaline earth metal, ammonium, tetraalkylammonium, tetraalkylphosphonium and / or tetraarylphosphonium salts of organic carboxylic acids having 1 to 20 carbon atoms, in particular formate, acetate, fluoroacetate, trifluoroacetate, trichloroacetate, propionate, butyrate, oxalate , Benzoate, pyridine carboxylate, organic sulfonic acids with 1 to 20 C atoms, in particular MeSO 3 " , EtSO 3 " , PrSO 3 " , F 3 CSO 3 " , C 4 F 9 SO 3 " , phenyl-SO 3 " , ortho- , meta- or para-ToIyI-SO 3 " , as well as ⁇ -ketocarboxylates, such as, for example, salts of the grape acid, ß-ketoketonates, especially acetylace
- Pyrocatechol and salicylic acid especially those with up to 20 carbon atoms.
- the oxygen atoms are bound in a 1,3 arrangement, in oxalate both in a 1,3 and in a 1,4 arrangement, in ß-ketoketonates in a 1,5 Arrangement and in ß-ketocarboxylates in a 1, 3 as well as in a 1, 5 arrangement.
- the carboxylates and sulfonates can have a linear, branched or cyclic basic structure and can be aliphatic and / or aromatic. Furthermore, they can be substituted with the groups R defined above or unsubstituted.
- Alkali salts include lithium, sodium, potassium, rubidium and
- cesium salts preferably sodium and potassium salts.
- Alkaline earth metal salts are to be understood as beryllium, magnesium, calcium, strontium and barium salts, preferably magnesium salts.
- Tetraalkylammonium salts are preferably to be understood as meaning those having a total of 4 to 40 carbon atoms, in particular tetramethylammonium, tetraethylammonium, tetrapropylammonium and tetrabutylammonium.
- Preferred tetraalkyl phosphonium salts are those with a total of 4 to 40
- Tetraarylphosphonium salts are preferably to be understood as meaning those having a total of 20 to 40 carbon atoms, in particular tetraphenylphosphonium and tetratolylphosphonium.
- Salts which are soluble in the reaction medium are preferably used, preferably those which are soluble in a concentration of at least 0.001 mol / l, particularly preferably in a concentration of at least 0.01 mol / l, very particularly preferably in a concentration of at least
- Preferred internal salts are amino carboxylic acids, preferably having 2 to 20 carbon atoms, which are predominantly zwitterionic in a neutral medium, in particular ⁇ -amino acids, such as glycine, alanine, arginine, asparagine, Aspartic acid, glutamine, glutamic acid, histidine, leucine, isoleucine, lysine, phenylalanine, proline, serine, threonine, typtophane, tyrosine or valine, as well as ß- and ⁇ -amino acids, such as ⁇ -aminobutyric acid, aromatic amino acids, such as 2-aminobenzoic acid, 3 -Amino benzoic acid, 4-amino benzoic acid, polyaminocarboxylic acids, such as EDTA and EDTA derivatives, and the corresponding N-alkylated aminocarboxylic acids of the abovementioned classes of compounds, the alkyl groups preferably
- Preferred internal salts are also aminosulfonic acids, preferably having 2 to 20 C atoms , such as taurine, and the corresponding N-alkylated aminosulfonic acids, the alkyl groups preferably containing 1 to 10 carbon atoms, particularly preferably 1, 2, 3 or 4 carbon atoms. Also preferred are the salts of these amino acids or aminosulfonic acids, which are obtained by abstraction of one or more protons of these compounds, the cations mentioned above being suitable as cations.
- the preferred molar ratio of metal to the added salt is 1: 1 to 1: 1000, particularly preferably 1: 5 to 1: 300, entirely
- the molar ratio of the metal compound of the formula (2) or formula (3) to the added salt is preferably 1: 1 to 1: 1000, particularly preferably 1: 5 to 1: 300, very particularly preferably 1:10 to 1: 150 and the molar ratio of the metal compound of the formula (4) to the added salt is preferably 1: 2 to 1: 2000, particularly preferably 1:10 to 1: 600, very particularly preferably 1:20 to 1: 300.
- the reaction is carried out in a solvent mixture of an organic solvent and water, preferably in a homogeneous solution.
- Homogeneously refers to the solvent mixture, the starting materials and the added salt, but not to the reaction product, which generally precipitates out of the reaction mixture.
- Organic solvents which are miscible with water are therefore preferred, in particular those which are mixed in any ratio Water miscible. These are in particular polar protic and polar aprotic solvents.
- Preferred polar protic solvents are alcohols, in particular
- Alcohols with 1 to 5 carbon atoms for example methanol, ethanol, n-propanol, iso-propanol, n-butanol, iso-butanol or tert-butanol, or else diols or polyalcohols, for example ethylene glycol, propylene glycol, glycerol, polyethylene glycols , for example PEG600 and
- PEG1000 and also alkoxy alcohols, for example methoxyethanol or ethoxyethanol.
- Preferred polar aprotic solvents are water-miscible open-chain ethers, for example triethylene glycol dimethyl ether, poly (ethylene glycol) dimethyl ether, water-miscible cyclic ethers such as dioxane or THF, and DMSO, NMP and DMF.
- a polar aprotic solvent is particularly preferably used as the organic solvent, very particularly preferably a cyclic water-miscible ether, in particular dioxane.
- the proportion of water in the reaction medium is at least 2% by volume.
- the proportion of water is preferably in the range from 5 to 90% by volume, particularly preferably in the range from 7 to 75% by volume, very particularly preferably in the range from 10 to 60% by volume.
- a water content of 40 to 60% by volume is particularly suitable.
- the reaction is preferably carried out in a temperature range from 20 to 250 ° C., particularly preferably from 40 to 150 ° C., very particularly preferably from 50 to 100 ° C.
- These reaction conditions which are significantly milder than the reaction conditions according to the prior art, offer the advantage that the reaction can also be carried out with thermally and / or chemically sensitive ligands and that no ligand exchange reactions take place at these temperatures, so that heteroleptic complexes can also be obtained with high yield, selectivity and purity by this process.
- the reaction at these temperatures can be below Reflux.
- the reaction in a mixture of dioxane and water is preferably carried out under reflux. This corresponds to a 1:
- the reaction may also be under pressure, for example in an autoclave be carried out 1 mixture of a temperature of about 85-90 0 C..
- the concentration of the metal starting compound according to formula (2) or formula (3) is preferably in the range from 0.5 mmol / l to 100 mmol / l, particularly preferably in the range from 1 to 30 mmol / l, very particularly preferably in the range from 2 to 10 mmol / l.
- the concentration of the starting metal compound according to formula (4) is preferably in the range of
- the preferred molar ratio of the metal compound according to formula (2) or formula (3) to the ligand according to formula (5) is 1: 1 to 1:60, particularly preferably 1: 3 to 1:10, very particularly preferably 1: 3 to 1: 8.
- the preferred molar ratio of the metal compound according to formula (4) to the ligand according to formula (5) is 1: 1 to 1: 100, particularly preferably 1: 2 to 1:70, very particularly preferably 1: 2 to 1:50.
- the ligand Since the ligand is usually used in excess, sometimes even in a substantial excess, it can make sense to recover it after the reaction, especially in the case of ligands which are difficult to synthesize. This can be done, for example, by extracting the mother liquor with a water-immiscible solvent.
- the reaction is preferably carried out within 1 to 100 h, particularly preferably within 5 to 50 h. It is striking that the reaction proceeds much faster than reactions according to the prior art, despite the milder reaction conditions.
- a further acceleration of the reaction can be achieved, for example, using microwave radiation.
- WO 04/108738 describes, for example, how ortho-metallation reactions can generally be carried out in the microwave.
- the Use of microwave radiation is in the invention
- the facial or meridional metal complexes can be selectively produced by the method according to the invention. It was found that in particular when using metal carboxylates, for example acetate, the meridional metal complexes are formed, while when using amino acids, alkylated amino acids, aminosulfonic acids, alkylated aminosulfonic acids and purely inorganic salts, the corresponding facial metal complexes are formed.
- a method for producing a facial tris-ortho-metallated metal complex according to formula (1) is furthermore preferred, characterized in that first a meridional complex is produced by a method according to the invention as described above, followed by a reaction step for converting the meridional into the facial isomer of the complex.
- This conversion of the meridional into the facial isomer can be carried out by adding energy, in particular thermal energy or electromagnetic radiation (UV radiation, microwave radiation, etc.).
- the conversion step can either be carried out directly in the reaction solution following the reaction as a one-pot process, or it can be carried out in a separate reaction step after isolation of the meridional metal complex. How the conversion from the meridional to the facial complex can be carried out is, for example, from
- Another object of the invention is the use of the method for the production of difunctionalized metal complexes, in particular for the production of dibromo compounds. These are particularly suitable for use as monomers for the production of polymers.
- the process according to the invention makes these monomers easily accessible for the first time and with a wide range of ligands.
- heteroleptic metal complexes can be obtained particularly simply, selectively and in good yields by the process according to the invention, for example octahedral complexes which are substituted on two of the three ligands with bromine, boronic acid or boronic acid esters, for example boronic acid glycol ester or boronic acid pinacol ester, as the polymerizable functional group and on third ligands carry no polymerizable group, such polymers, oligomers or dendrimers are also more accessible than according to the prior art.
- the invention therefore furthermore relates to the use of difunctionalized compounds of the formula (1), obtained by a process according to the invention, for the production of conjugated, partially conjugated or non-conjugated polymers, oligomers or dendrimers.
- the functional groups are the difunctionalized ones
- the method according to the invention offers the following advantages over the prior art: 1.
- the method according to the invention enables access to tris-ortho-metallated metal complexes from easily accessible metal halide in one step and in very good yield, while the methods according to the prior art Technology of more elaborate
- Educts for example different metal ketoketonate complexes, or have significantly poorer yields.
- Acetylacetonate or inorganic bases such as hydrogen carbonate, which, however, do not contain any water in the reaction mixture, take place under significantly more drastic reaction conditions (use of microwave radiation, reaction at above 190 ° C.).
- This effect of water on the reaction is surprising and Unpredictable result, since in the prior art a reaction in a mixture of ethoxyethanol and water without the addition of a salt only gave a yield of 10%.
- the process can also be used for the synthesis of metal complexes with thermally and / or chemically sensitive ligands, which lead to undesired side reactions in processes according to the prior art.
- the meridional complexes which are otherwise only laborious and accessible under very precise control of the reaction conditions, can be synthesized simply and selectively. Since the meridional isomer emits red-shifted in relation to the facial, it can preferably be used for
- Red emission generation can be used.
- the meridional complex can, if desired, also selectively in the
- Iridium (III) chloride hydrate can be obtained from Heraeus and corresponds to the formula IrCl 3 * H 2 O according to iridium and water content determination.
- the simple substituted 2-phenylpyridines can be obtained from Aldrich or
- Example 1 Synthesis of homoleptic meridional metal complexes from IrCl 3 * H 2 O - general synthesis instructions
- Formula (5) and the salt are mixed with the organic solvent and water and stirred at 80 0 C for 30 h.
- the ligand structures, the salt, the solvents and the respective amounts are listed in Table 1 together with the yields.
- the precipitate is filtered off (P4) _ three times with 50 ml of a mixture of 50 ml of 1 N aqueous
- Example 3 Synthesis of homoleptic facial metal complexes from IrCl 3 * H 2 O with the addition of amino acids / aminosulfonic acids - general synthesis instructions
- a mixture of 10 mmol IrCl 3 * H 2 O 1 60 mmol of the ligand according to formula (5) and the amino acid or aminosulfonic acid is mixed with the organic solvent and water and stirred at 80 ° C. for 30 h.
- the ligand structures, the amino acid or aminosulfonic acid, the solvents and the respective amounts are listed in Table 3 together with the yields.
- the precipitate is filtered off (P4), three times with 50 ml of a mixture of 50 ml of 1 N aqueous hydrochloric acid and 150 ml of ethanol, three times with 50 ml of a mixture of 100 ml of water and 100 ml of ethanol and three times with 50 ml each Washed ethanol and dried at 70 0 C in a vacuum.
- the purity of the products obtained by this process is at least 99.0% according to 1 H-NMR without further purification.
- Example 4 Synthesis of homoleptic meridionate and heteroleptic metal complexes from dimeric iridium complexes - general synthesis instructions
- Sodium acetate is mixed with 500 ml of dioxane and 500 ml of water and stirred at 80 ° C. for 30 h (Examples 4a) to 4f)).
- a mixture of 0.5 mmol of the dimeric iridium complex of the formula (4), 6 mmol of the ligand of the formula (5) and 30 mmol of sodium acetate is mixed with 50 ml of dioxane and 50 ml of water and stirred at 80 ° C. for 30 h (Examples 4g) up to 4t)).
- the corresponding meridional complexes are obtained in each case.
- the exact structures of the starting complex and the ligand are listed in Table 4 together with the yields.
- the precipitate is filtered off (P4), three times with 50 ml of a mixture of 50 ml of 1 N aqueous hydrochloric acid and 150 ml of ethanol, three times with 50 ml of a mixture of 100 ml of water and 100 ml of ethanol and three times with 50 ml each Washed ethanol and dried at 70 C C in a vacuum.
- the purity of the products obtained by this process is at least 99.0% according to 1 H-NMR without further purification.
- the dimeric iridium complexes according to formula (4) can be prepared according to the literature (K.A. King, P.J. Spellane, R.J. Watts, J. Am. Chem. Soc. 1985, 107, 1431-1432), e.g. B .:
- Formula (4), 40 mmol of the ligand according to formula (5) and 300 mmol of N, N-dimethylglycine are mixed with 500 ml of dioxane and 500 ml of water and stirred at 80 ° C. for 30 h.
- a mixture of 0.5 mmol of the dimeric iridium complex of the formula (4), 6 mmol of the ligand of the formula (5) and 30 mmol of N, N-dimethylglycine is mixed with 50 ml of dioxane and 50 ml of water and stirred at 80 ° C. for 30 h (Examples 5f) to 5s)). This creates the corresponding facial complexes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT06828977T ATE493425T1 (de) | 2005-12-05 | 2006-11-09 | Verfahren zur herstellung ortho-metallierter metallverbindungen |
| JP2008543676A JP5248320B2 (ja) | 2005-12-05 | 2006-11-09 | オルト金属化金属化合物の調製方法 |
| EP06828977A EP1957505B1 (de) | 2005-12-05 | 2006-11-09 | Verfahren zur herstellung ortho-metallierter metallverbindungen |
| DE502006008627T DE502006008627D1 (de) | 2005-12-05 | 2006-11-09 | Verfahren zur herstellung ortho-metallierter metallverbindungen |
| US12/095,970 US7923521B2 (en) | 2005-12-05 | 2006-11-09 | Process for preparing ortho-metallated metal compounds |
| CN2006800458117A CN101321774B (zh) | 2005-12-05 | 2006-11-09 | 制备邻位金属化的金属化合物的方法 |
| KR1020087016378A KR101412921B1 (ko) | 2005-12-05 | 2006-11-09 | 오르토-금속화된 금속 화합물의 제조 방법 |
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| DE102005057963.9 | 2005-12-05 | ||
| DE102005057963A DE102005057963A1 (de) | 2005-12-05 | 2005-12-05 | Verfahren zur Herstellung ortho-metallierter Metallverbindungen |
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| US (1) | US7923521B2 (de) |
| EP (1) | EP1957505B1 (de) |
| JP (1) | JP5248320B2 (de) |
| KR (1) | KR101412921B1 (de) |
| CN (1) | CN101321774B (de) |
| AT (1) | ATE493425T1 (de) |
| DE (2) | DE102005057963A1 (de) |
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| WO2010086089A1 (de) | 2009-02-02 | 2010-08-05 | Merck Patent Gmbh | Metallkomplexe |
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| JP4154140B2 (ja) * | 2000-09-26 | 2008-09-24 | キヤノン株式会社 | 金属配位化合物 |
| DE10104426A1 (de) * | 2001-02-01 | 2002-08-08 | Covion Organic Semiconductors | Verfahren zur Herstellung von hochreinen, tris-ortho-metallierten Organo-Iridium-Verbindungen |
| DE10109027A1 (de) * | 2001-02-24 | 2002-09-05 | Covion Organic Semiconductors | Rhodium- und Iridium-Komplexe |
| DE10223337A1 (de) * | 2002-05-25 | 2003-12-04 | Covion Organic Semiconductors | Verfahren zur Herstellung von hochreinen, tris-orthometallierten Organo-Iridium-Verbindungen |
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- 2006-11-09 AT AT06828977T patent/ATE493425T1/de active
- 2006-11-09 WO PCT/EP2006/010740 patent/WO2007065523A1/de not_active Ceased
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- 2006-11-09 CN CN2006800458117A patent/CN101321774B/zh active Active
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| WO2020212296A1 (de) | 2019-04-15 | 2020-10-22 | Merck Patent Gmbh | Metallkomplexe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5248320B2 (ja) | 2013-07-31 |
| JP2009518324A (ja) | 2009-05-07 |
| DE102005057963A1 (de) | 2007-06-06 |
| KR20080081308A (ko) | 2008-09-09 |
| EP1957505A1 (de) | 2008-08-20 |
| CN101321774A (zh) | 2008-12-10 |
| TW200738739A (en) | 2007-10-16 |
| US20080312396A1 (en) | 2008-12-18 |
| CN101321774B (zh) | 2012-11-14 |
| ATE493425T1 (de) | 2011-01-15 |
| DE502006008627D1 (de) | 2011-02-10 |
| EP1957505B1 (de) | 2010-12-29 |
| KR101412921B1 (ko) | 2014-06-26 |
| US7923521B2 (en) | 2011-04-12 |
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