Compound comprising phenyl pyridine units
View Patent ↗Organic compounds of formula I may be used in optoelectronic devices wherein R 1 is, independently at each occurrence, a C 1 -C 20 aliphatic radical, a C 3 -C 20 aromatic radical, or a C 3 -C 20 cycloaliphatic radical; R 2 is, independently at each occurrence, a C 1 -C 20 aliphatic radical, a C 3 -C 20 aromatic radical, or a C 3 -C 20 cycloaliphatic radical; a is, independently at each occurrence, an integer ranging from 0-4; b is, independently at each occurrence, an integer ranging from 0-3; Ar 1 is a direct bond or heteroaryl, aryl, or alkyl or cycloalkyl; Ar 2 is heteroaryl, aryl, or alkyl or cycloalkyl; c is 0, 1 or 2; and n is an integer ranging from 2-4.
1. A compound of formula VIII
wherein
R 1 , R 2 and R 3 are, independently at each occurrence, a C 1 -C 20 aliphatic radical, a C 3 -C 20 aromatic radical, or a C 3 -C 20 cycloaliphatic radical;
a and d are, independently at each occurrence, an integer ranging from 0-4;
b is, independently at each occurrence, an integer ranging from 0-3;
Ar 1 is a direct bond or heteroaryl, aryl, or alkyl or cycloalkyl;
c is 0, 1 or 2; and
n is an integer ranging from 2-4.
2. The compound according to claim 1 , being of formula
3. The compound according to claim 1 , being of formula
4. The compound according to claim 1 , wherein Ar 1 is a direct bond.
5. The compound according to claim 1 , wherein Ar 1 is independently chosen from
6. The compound according to claim 1 , being of formula
7. An optoelectronic device comprising at least one compound of formula VIII
wherein
R 1 , R 2 and R 3 are, independently at each occurrence, a C 1 -C 20 aliphatic radical, a C 3 -C 20 aromatic radical, or a C 3 -C 20 cycloaliphatic radical;
a and d are, independently at each occurrence, an integer ranging from 0-4;
b is, independently at each occurrence, an integer ranging from 0-3;
Ar 1 is a direct bond or heteroaryl, aryl, or alkyl or cycloalkyl;
c is 0, 1 or 2; and
n is an integer ranging from 2-4.
8. The optoelectronic device according to claim 7 , wherein the at least one compound is of formula
9. The optoelectronic device according to claim 7 , being an organic light emitting device.
10. The optoelectronic device according to claim 9 , comprising an electron transporting layer comprising the at least one compound of formula VIII.
11. The optoelectronic device according to claim 7 , additionally comprising at least one blue, yellow, orange, or red phosphorescent dye, or a combination thereof.