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US 2006/0142604 A1Published application
Method for producing high-purity organoiridium compounds
AssigneeCovion Organic Semiconductors BmbH
InventorsIngrid Bach, Philipp Stossel, Hubert Spreitzer
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Abstract
The present invention relates to a process for preparing highly pure tris-ortho-metallated organoiridium compounds and such pure organometallic compounds which may find use as coloring components in the near future as functional components (=functional materials) in a series of different types of applications which can be classed within the electronics industry in the widest sense.
Claims20
A process for preparing homoleptic Ir(III) complexes of the formula (I)
- in which:
- CyD is a cyclic group which contains at least one donor atom via which the cyclic group is bonded to the metal and which may in turn bear one or more substituents R;
- the CyD and CyC groups are joined together via a covalent bond;
- CyC is a cyclic group which contains a carbon atom via which the cyclic group is bonded to the metal and which may in turn bear one or more substituents R;
- R is the same or different at each instance and is H, F, Cl, Br, I, NO2, CN, a straight-chain or branched or cyclic alkyl or alkoxy group having from 1 to 20 carbon atoms, in which one or more nonadjacent CH2 groups may be replaced by —O—, —S—, —NR1—, —CONR2—, —CO—O—, —CR1═CR1— or —C≡C—, and in which one or more hydrogen atoms may be replaced by F, or an aryl or heteroaryl group which has from 4 to 14 carbon atoms and may be substituted by one or more nonaromatic R radicals;
- where a plurality of substituents R, both on the same ring and on the two different rings, together may in turn form a further mono- or polycyclic, aliphatic or aromatic ring system;
- R1 and R2 are the same or different at each instance and are H or an aliphatic or aromatic hydrocarbon radical having from 1 to 20 carbon atoms,
- characterized by the reaction of an iridium(III)-containing reactant which contains at least one diketonate structural unit of the formula (II)
- in which:
- R4, R6 are the same or different at each instance and are a linear, branched or cyclic alkyl group having 1-20 carbon atoms, in which one or more nonadjacent CH2 groups may be replaced by —O—, —S—, —NR1—, —CONR2—, —CO—O—, —CR1═CR1— or —C≡C—, and in which one or more hydrogen atoms may be replaced by F or aromatic groups each having from 3 to 14 carbon atoms, or an aryl and/or heteroaryl group having 3-20 carbon atoms or an alkoxy group OR1,
- R5 is the same or different at each instance and is a linear, branched or cyclic alkyl group having 1-20 carbon atoms, in which one or more nonadjacent CH2 groups may be replaced by —O—, —S—, —NR1—, —CONR2—, —CO—O—, —CR1═CR1— or —C≡C—, and in which one or more hydrogen atoms may be replaced by F or aromatic groups each having from 3 to 14 carbon atoms, or an aryl and/or heteroaryl group having 3-20 carbon atoms,
- R1 and R2 are the same or different at each instance and are H or an aliphatic or aromatic hydrocarbon radical having from 1 to 20 carbon atoms,
- excluding homoleptic diketonate complexes of the formula (II) and compounds of the formula (II) which contain two ligands of the formula (III)
- where the symbols CyC and CyD in formula (III) are each as defined under formula (I),
- with a compound of the formula (IV)
- in which the symbols CyD and CyC are each as defined under formula (I).
13 more elements
Dependencies are inferred from the claim text.