Patent ID: 7125952

Claim:
A polymer for use in an optical device comprising one or more regions, where each region comprises (i) a first structural unit selected from the following formulae: where R and R 1 are the same or different and each comprises a group selected from the group consisting of halide, cyano, substituted alkyl, unsubstituted alkyl, substituted alkoxy, unsubstituted alkoxy, substituted aryl, unsubstituted aryl, substituted aryloxy, unsubstituted aryloxy, substituted heteroaryl, unsubstituted heteroaryl, substituted heteroaryloxy and unsubstituted heteroaryloxy groups, with the proviso that R 1 can also be hydrogen in the first structural unit consisting of a biphenyl moiety, R 2 , R 3 , R 4 and R 5 are the same or different and each comprises a group selected from the group consisting of hydrogen, halide, cyano, substituted alkyl, unsubstituted alkyl, substituted alkoxy, unsubstituted alkoxy, substituted aryl, unsubstituted aryl, substituted aryloxy, unsubstituted aryloxy, substituted heteroaryl, unsubstituted heteroaryl, substituted heteroaryloxy and unsubstituted heteroaryloxy groups, and (ii) a second structural unit Ar selected from the group consisting of heteroaryl, triarylamine and 2,7-fluorenyl groups; such that the region comprises a unit having general formula II: first structural unit—Ar (II) wherein, R and R 1 have a molecular weight of less than 300.