Novel azobenzene-containing optically active polyamide-phenyleneethynylenes, poly( 2 – 3ap )–poly( 2 – 3bm ) were synthesized by the Sonogashira–Hagihara coupling polymerization of azobenzene-containing bis(iodophenylene) monomer 2 and m -, p -diethynylbenzene derivatives 3ap – 3bm . Polymers with number-average molecular weights of 1500–107,800 were obtained in 52%-quantitative yields. The azobenzene moiety of 2 showed reversible light-induced trans – cis isomerization, while the polymers showed irreversible isomerization depending on the composition of mixed solvents.

中文翻译：

---

主链含偶氮苯的聚酰胺-亚苯基乙炔的合成及光异构化行为

新型含偶氮苯光学活性聚酰胺-亚苯基乙炔，聚（2-3ap）-聚（2-3bm）是通过含有偶氮苯的双（碘亚苯基）单体2和间-，对-二乙炔衍生物的Sonogashira-Hagihara偶联聚合合成的3ap – 3bm 。以 52% 的定量产率获得了数均分子量为 1500–107,800 的聚合物。2 的偶氮苯部分显示出可逆的光诱导的反-顺异构化，而聚合物显示出不可逆的异构化，这取决于混合溶剂的组成。