Charge transport compositions and electronic devices made with such compounds

A phenanthroline compound having Formula I,

• wherein:
• R1 and R2 are the same or different at each occurrence and are selected from H, F, Cl, Br, alkyl, heteroalkyl, alkenyl, alkynyl, substituted aryl, heteroaryl, CnHaFb, OCnHaFb, C6HcFd, and OC6HcFd;
• a, b, c, and d are 0 or an integer such that a+b=2n+1, and c+d=5,
• n is 1–20;
• x is an integer from 1 through 3;
• y is 0, 1 or 2;
• wherein at least one R1 is selected from substituted phenyl and substituted biphenyl having at least one substituent selected from CnHaFb, OCnHaFb, C6HcFd, and OC6HcFd, wherein b and d are integers.