Organic electroluminescent compound, organic electroluminescent material comprising the same, and organic electroluminescent device

1. An organic electroluminescent compound represented by formula 2, 3, 4, 5 or 7:

wherein,

X 1 to X 3 each independently represent CR 12 or N;

at least one of X 1 to X 3 represents N;

Ar 1 to Ar 3 each independently represent a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;

R 1 to R 3 , and R 12 each independently represent hydrogen, deuterium, halogen, cyano, carboxyl, nitro, hydroxyl, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C3-C30)cycloalkenyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl; or R 1 and R 3 may be linked to an adjacent substituent to form a substituted or unsubstituted (C3-C30) mono- or polycyclic, alicyclic or aromatic ring or a combination thereof;

a and b each independently represent an integer from 0 to 4; c represents an integer from 0 to 2; when a or b is an integer of 2 or more or c is 2, each of R 1 , each of R 2 , or each of R 3 may be the same or different;

L 1 is represented by the following formula R-1:

wherein,

R 4 represents hydrogen, deuterium, halogen, cyano, carboxyl, nitro, hydroxyl, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C3-C30)cycloalkenyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (3- to 30-membered)heteroaryl;

d represents an integer from 0 to 6, when d is an integer of 2 or more, each of R 4 may be the same or different;

* represents a linkage position with an adjacent ring in formula 1.

2. The organic electroluminescent compound according to claim 1 , wherein the substituents of the substituted (C1-C30)alkyl, the substituted (C3-C30)cycloalkyl, the substituted (C3-C30)cycloalkenyl, the substituted (3- to 7-b membered)heterocycloalkyl, the substituted (C6-C30)aryl, the substituted (3- to 30-membered)heteroaryl, and the substituted (C3-C30) mono- or polycyclic, alicyclic, or aromatic ring, or a combination thereof in Ar 1 to Ar 3 , R 1 to R 4 , and R 12 , each independently, are at least one selected from the group consisting of deuterium, halogen, cyano, carboxyl, nitro, hydroxyl, (C1-C30)alkyl, halo(C1-C30)alkyl, (C2-C30)alkenyl, (C2-C30)alkynyl, (C1-C30)alkoxy, (C1-C30)alkylthio, (C3-C30)cycloalkyl, (C3-C30)cycloalkenyl, (3- to 7-membered)heterocycloalkyl, (C6-C30)aryloxy, (C6-C30)arylthio, unsubstituted (5- to 30-membered)heteroaryl, (5- to 30-membered)heteroaryl substituted with (C6-C30)aryl, unsubstituted (C6-C30)aryl, (C6-C30)aryl substituted with (5- to 30-membered)heteroaryl, tri(C1-C30)alkylsilyl, tri(C6-C30)arylsilyl, di(C1-C30)alkyl(C6-C30)arylsilyl, (C1-C30)alkyldi(C6-C30)arylsilyl, amino, mono- or di-(C1-C30)alkylamino, unsubstituted mono- or di-(C6-C30)arylamino, mono- or di-(C6-C30)arylamino substituted with (C1-C30)alkyl, (C1-C30)alkyl(C6-C30)arylamino, (C1-C30)alkylcarbonyl, (C1-C30)alkoxycarbonyl, (C6-C30)arylcarbonyl, di(C6-C30)arylboronyl, di(C1-C30)alkylboronyl, (C1-C30)alkyl(C6-C30)arylboronyl, (C6-C30)aryl(C1-C30)alkyl, and (C1-C30)alkyl(C6-C30)aryl.

3. The organic electroluminescent compound according to claim 1 , wherein at least two of X 1 to X 3 represent N;

Ar 1 to Ar 3 each independently represent a substituted or unsubstituted (C6-C25)aryl;

R 1 to R 4 , and R 12 each independently represent hydrogen or deuterium.

4. The organic electroluminescent compound according to claim 1 , wherein the compound represented by formula 2 to 5 or 7 is selected from the following compounds:

5. An organic electroluminescent material comprising the organic electroluminescent compound according to claim 1 .

6. An organic electroluminescent device comprising the organic electroluminescent compound according to claim 1 .