Electroluminescent devices

Claim 1

An electroluminescent device comprising an anode, a cathode and one or a plurality of organic compound layers sandwiched therebetween, in which said organic compound layers comprise an organic compound, as the constituent ingredient, represented by the following formula (I): ##STR211## wherein B represents ##STR212## (in which X 1 is H, Cl, CH 3 , OCH 3 , C 2 H 5 or CN, and l is 1, 2 or 3), ##STR213## (in which X 2 is H or OCH 3 , and X 3 is H, CH 3 , ##STR214## (in which X 4 is H or ##STR215## (in which D is O, S, or N, X 5 is H or COOH, X 6 is H, CH 3 , C 2 H 5 or ##STR216## and κ is 0 or 1), ##STR217## (in which X 7 is H or O), ##STR218## (in which X 8 is O or C(CN) 2 ), ##STR219## (in which X 9 is H or CH 3 ), ##STR220## (in which X 10 is O or C(CN) 2 ), ##STR221## (in which D is O, S or N, Y 1 is H, and i is 0 or 1), ##STR222## (in which E is O or S), ##STR223## (in which E is O or S), ##STR224## (in which G is S or NH), ##STR225## (in which Z represents: (1) substituted or unsubstituted (C 4 -C 6 ) cycloalkenes containing at least one double bond in the ring, (2) (C 4 -C 6 ) cycloalkenes having an aromatic ring and containing one double bond in the ring, (3) 5- or 9-membered heterocycles containing a double bond and at least one oxygen in the ring, (4) 5-membered heterocycles having an aromatic ring, and containing one oxygen and at least one double bond in the ring, (5) 6- or 7-membered heterocycles having C 4 or C 6 cycloalkene with at least one double bond, and containing two oxygen atoms in the ring, (6) C 5 , C 6 or C 11 heterocycles containing 1 or 2 sulfur atoms in the ring, (7) 5- or 6-membered heterocycles containing 2 to 4 nitrogen atoms and at least one double bond in the ring, (8) 5-, 6- or 8-membered heterocycles having an aromatic ring, and containing at least one double bond and 1 or 2 nitrogen atoms in the ring, or (9) 5- or 6-membered heterocycles containing 1 or 2 nitrogen atoms and, optionally, oxygen atom in the ring; Ar represents ##STR226## m represents an integer of 1 to 6; and n represents an integer of 1 to 6.