A polymer containing an optionally substituted repeat unit of formula (I) wherein each R is the same or different and represents H or an electron withdrawing group, and each R
1
is the same or different and represents a substituent.
一种聚合物,包含一个可选取代的重复单元,其
化学式为(I),其中每个R相同或不同,代表H或电子提取基团,每个R1相同或不同,代表取代基。