Oligoarylene derivatives and organic electroluminescent devices made by using the same

An oligoarylene derivative represented by the following general formula (3) or (4):

• Ar3-(L1)a-Ch3-(L2)b-Ar4 (3)
• wherein Ch3 is a substituted or unsubstituted arylene group having 14 to 20 nuclear carbon atoms;
• L1 and L2 are respectively a connecting group and may be the same or different from each other;
• a and b are respectively an integer of 0 to 1;
• and
• Ar3 and Ar4 are respectively a substituted or unsubstituted aryl group having 5 to 30 nuclear atoms and may be the same or different from each other with the proviso that when Ch3 is a substituted or unsubstituted pyrene residue, Ar3 and/or Ar4 are respectively a substituted or unsubstituted □-naphthyl derivative, and
• Ar5-Ch4-(Ar7)n-L3-(Ar8)m-Ch5-Ar6 (4)
• wherein L3 is a connecting group;
• Ch4 and Ch5 are respectively a substituted or unsubstituted arylene group having 14 to 20 nuclear atoms and may be the same or different from each other;
• Ar5 and Ar6 are respectively a substituted or unsubstituted aryl group having 5 to 30 nuclear atoms and may be the same or different from each other;
• Ar7 and Ar8 are respectively a substituted or unsubstituted arylene group having 5 to 30 nuclear atoms and may be the same or different from each other;
• and n and m are respectively an integer of 0 to 1.