Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
Quinoline derivatives and organic electroluminescent devices
Quinoline derivatives represented by formula (1) wherein two or more of substituents R1 to R7 are each a group of formula (2). In general formula (2), Q is a carbo- or hetero-aryl group; and the number (n) of double bonds is preferably 1 to 3. Use of such derivatives in an organic EL device provided with a layer of an organic compound and two electrodes sandwiching the layer as the organic compound gives devices emitting yellow to red light with high brightness and high efficiency. Further, doping a hole transport layer with such derivatives realizes organic EL devices capable of emitting lights of resultant colors (e.g., white) composed of lights from light-emitting and hole transport layers. 
Kabushiki Kaisha Toyota Chuo Kenkyusho
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Tomohiko Hiromitsu Masahiko Hisato Koji Shizuo Makoto
Mori Tanaka Ishii Takeuchi Noda Tokito Mouri