Organic electroluminescent device

1. An organic electroluminescent device comprising a pair of electrodes and at least one organic layer between the pair of electrodes, wherein the organic layer contains at least one compound represented by the following formula (I):

wherein X 11 to X 16 each independently represents C—R or N; R represents a hydrogen atom or a substituent, provided that Rs are not bound to each other to form a fused aromatic ring; Q 1 and Q 2 each independently represents a coordinating group which is bound to zinc at the O, N or S atom; L 1 and L 2 each independently represents a connecting group; and n 1 and n 2 each represents 0 or 1, provided that sum of n 1 and n 2 is 1.

2. The organic electroluminescent device as claimed in claim 1 , wherein the compound represented by the formula (I) is represented by the following formula (II):

wherein R 11 to R 16 each independently represents a hydrogen atom or a substituent, provided that each of R 11 to R 13 is not bound to other of R 11 to R 13 to form a fused aromatic ring and that each of R 14 to R 16 is not bound to other of R 14 to R 16 to form a fused aromatic ring; Q 1 and Q 2 each independently represents a coordinating group which is bound to zinc at the O, N or S atom; L 1 and L 2 each independently represents a connecting group; and n 1 and n 2 each represents 0 or 1, provided that sum of n 1 and n 2 is 1.

3. The organic electroluminescent device as claimed in claim 1 , wherein the compound represented by the formula (I) is represented by the following formula (III):

wherein R 11 to R 16 each independently represents a hydrogen atom or a substituent, provided that each of R 11 to R 13 is not bound to other of R 11 to R 13 to form a fused aromatic ring and that each of R 14 to R 16 is not bound to other of R 14 to R 16 to form a fused aromatic ring; R 31 to R 34 each independently represents a hydrogen atom or a substituent; and L 1 represents a connecting group.

4. The organic electroluminescent device as claimed in claim 1 , wherein the compound represented by the formula (I) is represented by one of the following formulae 1 to 30:

wherein Ph represents a phenyl group, and t Bu represents a tertiary butyl group.

5. The organic electroluminescent device as claimed in claim 1 , wherein the compound represented by the formula (I) has a glass transition temperature of from 130° C. to 450° C.

6. The organic electroluminescent device as claimed in claim 1 , wherein the compound represented by the formula (I) has a glass transition temperature of from 135° C. to 450° C.

7. The organic electroluminescent device as claimed in claim 1 , wherein the compound represented by the formula (I) has a glass transition temperature of from 140° C. to 450° C.

8. The organic electroluminescent device as claimed in claim 1 , wherein the compound represented by the formula (I) has a glass transition temperature of from 150° C. to 450° C.

9. The organic electroluminescent device as claimed in claim 1 , wherein the compound represented by the formula (I) has a glass transition temperature of from 160° C. to 450° C.

10. The organic electroluminescent device as claimed in claim 1 , wherein the at least one organic layer contains at least one light emitting material, and at least one of the light emitting material is a phosphorescent material.

11. The organic electroluminescent device as claimed in claim 1 , wherein the compound represented by the formula has a minimum excitation triplet energy level of from 65 kcal/mole to 95 kcal/mole.

12. The organic electroluminescent device as claimed in claim 1 , wherein the compound represented by the formula has a minimum excitation triplet energy level of from 67 kcal/mole to 95 kcal/mole.

13. The organic electroluminescent device as claimed in claim 1 , wherein the compound represented by the formula has a minimum excitation triplet energy level of from 69 kcal/mole to 95 kcal/mole.