Electron-transporting materials and processes for making the same

1. A compound of formula I

wherein

R 1 and R 2 are, independently at each occurrence, H, a C 1 -C 20 aliphatic radical, or

a C 3 -C 20 cycloaliphatic radical;

a is an integer ranging from 0-2;

b is 1 or 2;

c is an integer ranging from 0-4;

Ar 1 and Ar 2 are independently

Ar 3 is a phenyl group or H;

d is 0 or 1;

R 3 is H, a C 1 -C 20 aliphatic radical, or a C 3 -C 20 cycloaliphatic radical; and

e is an integer ranging from 0 to 4.

2. The compound of claim 1 , being of formula

3. The compound of claim 1 , wherein Ar 1 is pyridyl.

4. The compound of claim 1 , wherein Ar 2 is pyridyl.

5. The compound of claim 1 , being of formula

6. An optoelectronic device comprising a compound of formula I

wherein

R 1 and R 2 are, independently at each occurrence, H, a C 1 -C 20 aliphatic radical, or a C 3 -C 20 cycloaliphatic radical;

a is an integer ranging from 0-2;

b is 1 or 2;

c is an integer ranging from 0-4;

Ar 1 and Ar 2 are independently

Ar 3 is a phenyl group or H;

d is 0 or 1;

R 3 is H, a C 1 -C 20 aliphatic radical, or a C 3 -C 20 cycloaliphatic radical; and

e is an integer ranging from 0 to 4.

7. The optoelectronic device of claim 6 , comprising a compound of formula

8. The optoelectronic device of claim 6 , wherein the compound is of formula

9. The optoelectronic device of claim 6 , comprising one or more fluorescent emissive materials.

10. The optoelectronic device of claim 6 , comprising one or more phosphorescent emissive materials.

11. The optoelectronic device of claim 6 , comprising one or more, any or a combination of blue, yellow, orange, green and red phosphorenscent dyes.

12. A compound of formula