Vinyl polymer and organic electroluminescent device
AssigneesYasuhiko Shirota, Daicel Chemical Industries, Ltd.
InventorsYasuhiko Shirota, Yutaka Ohsedo, Kazuyuki Moriwaki, Kenji Okumoto
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Abstract
An organic electroluminescent device has an organic layer between a pair of electrodes. The organic layer (in particular, a hole-transporting layer) has a polymer of a vinyl compound represented by the following formula (1): wherein R1 and R2 are the same or different, each representing a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group. The glass transition temperature of the polymer is about 200 to 250° C., and the polymer has high heat-resistance. Thus, the use of the polymer improves heat resistance of an organic EL device.
Claims8
A process for producing a vinyl compound shown by the following formula (1):
- wherein R1 and R2 are the same or different, each representing a hydrogen atom, a halogen atom or an alkoxy group;
- said process comprising the following steps:
- (i) reacting aniline with compounds represented by the formulae (IB-1) and (IB-2):
- to form a compound represented by the following formula (IB-3):
- wherein X1 in formulae (IB-1) and (IB-2) represents a halogen atom, and each of R1 and R2 in formulae (IB-1), (IB-2) and (IB-3) has the same meanings as defined above;
- (ii) halogenating said compound (IB-3) to form a compound represented by the following formula (IC):
- wherein X2 in formula (IC) represents a halogen atom, and each of R1 and R2 has the same meanings as defined above;
- and
- (iii) reacting said compound (IC) with a dihydroxyborostyrene shown by the following formula (IF):
A vinyl compound represented by the following formula (1):
- wherein R1 and R2 are the same or different from each other, and each represents a hydrogen atom, a halogen atom or an alkoxy group.
Dependencies are inferred from the claim text.