Single-handed helical polyethers synthesized via anionic polymerization of optically active 3-(9-alkylfluoren-9-yl)propene oxides
作者:Yunkai Sun、Nianfa Yang、Ji Liu、Jing Cao、Hang Gong
DOI:10.1016/j.polymer.2010.10.017
日期:2010.11
A series of optically active 3-(9-alkylfluoren-9-yl)propene oxides were synthesized by the reaction of 9-alkylfluoren-9-yllithium with the optically active epichlorohydrin at −70 °C and polymerized using KOH as an initiator. The molecular weight of the poly(3-(9-alkylfluoren-9-yl)propene oxide)s is larger than that of poly(4,4,4-triphenyl-1-butene oxide), which had been proved to take stable helical
通过使9-烷基芴-9-基锂与光学活性环氧氯丙烷在-70°C下反应,合成一系列光学活性3-(9-烷基氟-9-基)丙烯氧化物,并使用KOH作为引发剂进行聚合。聚(3-(9-烷基氟-9-基)环氧丙烷)的分子量大于聚(4,4,4-三苯基-1-丁烯氧化)的分子量,已证明具有稳定的分子量。溶液中呈螺旋状构象,分子量分布较窄(M w / M n 比聚(4,4,4-三苯基-1-丁烯氧化物)= 1.02至1.09)。通过研究衍生自光学活性环氧化物的一系列聚合物的手性,表明聚(3-(9-烷基氟-9-基)丙烯氧化物)在溶液中保持单手螺旋构象。