| abstract |
The present invention relates to polymers useful in optoelectronic devices comprising structural units of formula (I) (I) In this formula, 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; a is independently in each occurrence an integer from 0 to 4; Ar < 1 > is aryl or heteroaryl; Ar < 2 > is fluorene; R 2 is alkylene, substituted alkylene, oxaalkylene, CO or CO 2 ; R 3 , R 4 and R 5 are independently selected from the group consisting of hydrogen, alkyl, alkoxy, alkylaryl, aryl, arylalkyl, heteroaryl, substituted alkyl, substituted alkoxy, substituted alkylaryl, substituted aryl, , Or substituted heteroaryl; L is at least one selected from the group consisting of phenylpyridine, tolylpyridine, benzothienylpyridine, phenylisoquinoline, dibenzoquinolines, fluorenylpyridine, ketopyrrol, 2- (1-naphthyl) benzoxazole, 2-phenylbenzoxazole, 2 Phenylpyridine, pyridylpyrrole, pyridylpyridyl, pyridylpyridyl, pyridylpyridyl, pyridylpyridyl, pyridylpyridyl, pyridylpyridyl, pyridylpyridyl, Imidazole, phenyl indole, derivatives thereof, or combinations thereof. |