An organic electroluminescent device having 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): ##STR1##

    • 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.

    < Metal complexes of heterocyclic aromatic compounds

    < 3H-pyridopyrimidin-4-one compounds, compositions, and methods of their use

    > High-capacity sulfur adsorbent bed and gas desulfurization method

    > Parathyroid hormone receptor ligands

    ~ 00258