Synthesis of Optically Active Conjugated Polymers Bearing <i>m</i>-Terphenylene Moieties by Acetylenic Coupling Polymerization: Chiral Aggregation and Optical Properties of the Product Polymers
作者:Yu Miyagi、Hiromitsu Sogawa、Masashi Shiotsuki、Fumio Sanda
DOI:10.1021/ma402123w
日期:2014.3.11
The acetylenic coupling polymerization of d-hydroxyphenylglycine-derived m-terphenylene diynes 1–5 using Pd/Cu catalyst gave the corresponding polymers [poly(1)–poly(5)] with Mn = 12 000–60 000 in 53–89% yields. The polymers were soluble in THF and DMF. CD and UV–vis spectroscopic analysis revealed that p,p′-phenyleneethynylene-linked poly(1), poly(3), and poly(5) formed chiral higher-order structures
的炔偶联聚合d -hydroxyphenylglycine衍生米-terphenylene二炔1 - 5使用Pd / Cu基催化剂,得到相应的聚合物[聚(1) -聚(5)]与中号Ñ = 12 30000-60在53-89 000 %产率。该聚合物可溶于THF和DMF。CD和UV-vis光谱分析表明,p,p'-亚苯基亚乙炔基连接的poly(1),poly(3)和poly(5)在THF / H 2 O混合物中形成手性高阶结构,而m,m '-亚苯基亚乙炔基连接的聚(2)和poly(4)没有。通过模型系统随时间变化的密度泛函计算,可以合理地预测poly(1)CD信号的符号。聚合物发出的荧光的量子产率为0.2-14.8%。