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US 2010/0249349 A1Published application
Novel Polymers
AssigneeBASF SE
InventorsNatalia Chebotareva, Roger Prétôt, Paul Adriaan Van Der Schaaf, Thomas Schäfer, Beat Schmidhalter, Peter Murer
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Abstract
The present invention relates to novel polymers comprising a repeating unit of the formula (I) and their use in electronic devices. The polymers according to the invention have excellent solubility in organic solvents and excellent film-forming properties. In addition, high charge carrier mobilities and high stability of the emission color can be observed, if the polymers according to the invention are used in organic light emitting diodes (OLEDs).
Claims14
A polymer comprising a repeating unit(s) of the formula
- wherein A is a 5-, 6-, or 7-membered heteroaromatic ring, containing at least one heteroatom selected from nitrogen, oxygen and sulfur,
- Ra, R1, R2, R3, R4, R1′, R2′, R3′ and R4′ are independently of each other hydrogen, halogen, or an organic substituent, or
- Ra, R1, R2, R3, R4, R1′, R2′, R3′ and R4′, if possible, together form an aromatic, or heteroaromatic ring, or ring system, which can optionally be substituted,
- R7 is halogen, or an organic substituent, wherein two or more substituents R7 in the same molecule may have different meanings, or can form together an aromatic, or heteroaromatic ring, or ring system, wherein
- at least one of Ra, R1, R2, R3, R4, R1′, R2′, R3′ and R4′ is a group R10, wherein
- R10 is a group -(Sp)x1-[PG′]<, wherein
- Sp is a spacer unit,
- PG′ is a group derived from a polymerisable group,
- x1 is 0, or 1, and
- x is 0, or an integer of 1 to 4.
7 more elements
A compound of the formula
- wherein x, A, Ra, R1, R2, R3, R4, R1′, R2′, R3′, R4′ are independently of each other hydrogen, halogen, or an organic substituent, or
- Ra, R1, R2, R3, R4, R1′, R2′, R3′ and R4′, if possible, together form an aromatic, or heteroaromatic ring, or ring system, which can optionally be substituted
- R7 is halogen, or an organic substituent, wherein two or more substituents R7 in the same molecule may have different meanings, or can form together an aromatic, or heteroaromatic ring, or ring system,
- at least one of Ra, R1, R2, R3, R4, R1′, R2′, R3′ and R4′ is a group R10′, wherein
- R10′ is a group -(Sp)x1-[PG]<, wherein
- Sp is a spacer unit,
- PG is a polymerisable group,
- x1 is 0, or 1, and
- x is 0, or an integer of 1 to 5, with the proviso that the following compounds are excluded:
6 more elements
Dependencies are inferred from the claim text.