A polymer comprising repeat units of the formula:
1
wherein R
1
is independently in each occurrence C
1-20
hydrocarbyl or C1-20 hydrocarbyl containing one or more heteroatoms of S, N, O, P or Si or both R
1
may form, with the 9-carbon of the fluorene ring, a C
5-20
ring structure containing one or more heteroatoms of S, N, or O; R
2
is independently in each occurrence C
1-20
hydrocarbyl, C
1-20
hydrocarbyloxy, C
1-20
thioether, C
1-20
hydrocarbyloxycarbonyl, hydrocarbylcarbonyloxy, or cyano; a is independently in each occurrence a number from about 0 to about 1;
m is a number from about 1 to about 2; and
n is a number from about 3 or greater.
一种聚合物,包含如下公式的重复单元:1其中R1在每个出现的位置上独立地为C1-20烃基或含有S、N、O、P或Si等一种或多种杂原子的C1-20烃基,或者R1可以与
芴环的第9个碳原子形成一个含有S、N或O等一种或多种杂原子的C5-20环结构;R2在每个出现的位置上独立地为C1-20烃基、C1-20烃基氧、C1-20
硫醚、C1-20烃基氧羰基、烃基羰基氧或
氰基;a在每个出现的位置上独立地为约0到约1之间的数字;m为约1到约2之间的数字;n为约3或更大的数字。