超分子化学
支柱
氢键
偏苯三甲酸
结晶学
六方晶系
质子化
化学
超分子组装
材料科学
立体化学
纳米技术
分子
晶体结构
有机化学
离子
工程类
结构工程
作者
Dana Kaizerman‐Kane,Maya Hadar,Noam Tal,Roman Dobrovetsky,Yossi Zafrani,Yoram Cohen
标识
DOI:10.1002/anie.201900217
摘要
We describe the preparation of the first water-soluble pH-responsive supramolecular hexagonal boxes (SHBs) based on multiple charge-assisted hydrogen bonds between peramino-pillar[6]arenes 2 with the molecular "lid" mellitic acid (1 a). The interaction between 2 and 1 a, as well as the other "lids" pyromellitic and trimesic acids (1 b and 1 c, respecively) were studied by a combination of experimental and computational methods. Interestingly, the addition of 1 a to the complexes of the protonated form of pillar[6]arene 2, that is, 3, with bis-sulfonate 4 a or 4 b, immediately led to guest escape along with the formation of closed 1 a2 2 supramolecular boxes. Moreover, the process of the openning and closing of the supramolecular boxes along with threading and escaping of the guests, respectively, was found to be reversible and pH-responsive. This study paves the way for the easy and modular preparation of different SHBs that may have myriad applications.
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