对映体药物
化学
聚酯纤维
环戊烯
共聚物
环氧化物
高分子化学
手性(物理)
双金属片
亲核细胞
催化作用
有机化学
聚合物
对映选择合成
量子力学
手征对称破缺
物理
Nambu–Jona Lasinio模型
夸克
作者
Jie Li,Ye Liu,Wei‐Min Ren,Xiao‐Bing Lu
摘要
Synthesis of stereoregular polyesters with main-chain chirality was achieved for the first time by the asymmetric copolymerization of meso-epoxides and cyclic anhydrides using catalyst systems based on enantiopure bimetallic complexes. The combination of the biphenol-linked dinuclear aluminum complex with tert-butyl groups in the phenolate ortho-positions and a nucleophilic co-catalyst was found to be more efficient in catalyzing this asymmetric copolymerization, affording enantiomerically enriched polyesters (up to 91% ee) with completely alternating structure and narrow molecular weight distribution. It was discovered that the isotactic-enriched poly(cyclopentene phthalate) is a typical semicrystalline material with a melting endothermic peak at 221 °C. This study is expected to provide a promising route to prepare various stereoregular polyesters having a wide variety of physical properties and degradability.
科研通智能强力驱动
Strongly Powered by AbleSci AI