申请人:Yokoyama Norimasa
公开号:US20110001129A1
公开(公告)日:2011-01-06
[Problem] To provide an organic compound which shows an excellent electron-injecting/transporting performance, has a hole-blocking ability and shows a high stability as a film, that is, having excellent characteristics as a material for organic electroluminescent device having high efficiency and high durability; and to provide an organic EL device comprising the compound and having high efficiency and high durability.
[Means for Solution] A substituted bipyridyl compound represented by the general formula (1); and an organic electroluminescent device comprising a pair of electrodes and at least one organic layer sandwiched between then, wherein the compound is used as the constitutive material of at least one organic layer.
(wherein R
1
to R
7
may be the same or different, each representing a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, a trifluoromethyl group, a linear or branched alkyl group having from 1 to 6 carbon atoms, a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted condensed polycyclic aromatic group; n indicates an integer of from 2 to 4; A represents a di- to tetra-valent, substituted or unsubstituted aromatic hydrocarbon group, a di- to tetra-valent, substituted or unsubstituted aromatic heterocyclic group, a di- to tetra-valent, substituted or unsubstituted condensed polycyclic aromatic group, or a trivalent group represented by the following general formula (2):
(wherein X, Y and Z each represents a carbon atom or a nitrogen atom); provided that when n=2, the two bipyridyl structures may direct bond to each other, and in the case, A is absent).