螺旋(腹足类)
螺旋度
发光
对映体
圆极化
手性(物理)
化学
结晶学
圆二色性
光化学
立体化学
材料科学
光学
物理
手征对称破缺
光电子学
蜗牛
微带线
粒子物理学
生物
量子力学
Nambu–Jona Lasinio模型
生态学
夸克
作者
Lei Xu,Yong-Jie Wu,Run‐Tan Gao,Shiyi Li,Na Liu,Zong‐Quan Wu
标识
DOI:10.1002/anie.202217234
摘要
Inspired by biological helices (e.g., DNA), artificial helical polymers have attracted intense attention. However, precise synthesis of one-handed helices from achiral materials remains a formidable challenge. Herein, a series of achiral poly(biphenyl allene)s with controlled molar mass and low dispersity were prepared and induced into one-handed helices using chiral amines and alcohols. The induced one-handed helix was simultaneously memorized, even after the chiral inducer was removed. The switchable induction processes were visible to naked eye; the achiral polymers exhibited blue emission (irradiated at 365 nm), whereas the induced one-handed helices exhibited cyan emission with clear circularly polarized luminescence. The induced helices formed stable gels in various solvents with helicity discrimination ability: the same-handed helix gels were self-healing, whereas the gels of opposite-handed helicity were self-sorted. Moreover, the induced helices could separate enantiomers via enantioselective crystallization with high efficiency and switchable enantioselectivity.
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