Self-Assembly of Discrete Homochiral, Helical, Hydrogen-Bonded Nanocages: From Vesicles to Microspheres and Tubules Capable of Gelating Solvents
作者:Liwei Yan、Ying Xue、Ge Gao、Jingbo Lan、Fan Yang、Xiaoyu Su、Jingsong You
DOI:10.1002/chem.200902750
日期:2010.2.15
the carboxyl of tartaric acids. These hydrogen‐bonded nanocages can spontaneously self‐assemble into spherical vesicles, during which the hydrogen bonding that arises from the hydroxyl groups of tartaric acids plays a crucial issue. The vesicles formed by [(S,S,S)‐1 a}2(2L)3] (3 a) may further evolve into microspheres that gelate organic solvents after being aged at −20 °C for 24 h, and can also be
手性三-单齿配体的咪唑啉基1 - ç表现出强的倾向,以形成离散的,螺旋形的[2 + 3]纳米笼3([ 1 2 ⋅2 3 ])与酒石酸2。圆二色性(CD)光谱和理论计算表明,类似胶囊结构的超分子手性仅由咪唑啉基配体的手性决定,而不由酒石酸决定。咪唑啉基配体的手性通过咪唑啉环的N 3原子与酒石酸的羧基之间的定向氢键转移至配合物的螺旋。这些氢键结合的纳米笼可以自组装成球形囊泡,在此期间,酒石酸的羟基产生的氢键起着至关重要的作用。由[(S,S,S)-1 a } 2(2 L)3形成的囊泡](3a)可进一步发展成微球,该微球在-20℃下老化24小时后会凝胶化有机溶剂,并且还可以空前地转变成能够在经受超声波辐射时使溶剂硬化的管状组件。