Patent ID: 8241762

Claim:
A compound having the formula T-LG-T, where T is a charge transport moiety having the formula —Ar 1 -An-Ar 2 and LG is a linking group, wherein: An is a divalent anthracene moiety; Ar 1 is an aromatic group selected from the group consisting of naphthyl, binaphthyl, naphthylphenylene, naphthylbiphenylene, and naphthylbinaphthylene; Ar 2 is an aromatic group selected from the group consisting of naphthyl, binaphthyl, naphthylphenylene, naphthylbiphenylene, and naphthylbinaphthylene; and LG is a group having Formula I wherein Q 1 and Q 2 are the same or different and are selected from the group consisting of alkyl, or Q 1 and Q 2 taken together are alkylene, and Ar 3 and Ar 4 are the same or different and are selected from the group consisting of phenylene and naphthylene.