Kumar Vijith, Pilati Tullio, Terraneo Giancarlo, Meyer Franck, Metrangolo Pierangelo, Resnati Giuseppe
Laboratory of Nanostructured Fluorinated Materials (NFMLab) , Department of Chemistry, Materials, and Chemical Engineering "Giulio Natta" , Politecnico di Milano , Via L. Mancinelli 7 , 20131 Milano , Italy . Email:
VTT-Technical Research Centre of Finland , P. O. Box 1000, FI-02044 VTT , Finland.
Chem Sci. 2017 Mar 1;8(3):1801-1810. doi: 10.1039/c6sc04478f. Epub 2016 Oct 26.
A library of supramolecular anionic networks showing Borromean interpenetration has been prepared by self-assembly of crypt-222, several metal or ammonium halides, and five bis-homologous α,ω-diiodoperfluoroalkanes. Halogen bonding has driven the formation of these anionic networks. Borromean entanglement has been obtained starting from all the four used cations, all the three used anions, but only two of the five used diiodoperfluoroalkanes. As the change of the diiodoperfluoroalkane, the cation, or the anion has a different relative effect on the metrics and bondings of the self-assembled systems, it can be generalized that bonding, namely energetic, features play here a less influential role than metric features in determining the topology of the prepared tetra-component cocrystals. This conclusion may hold true for other multi-component systems and may function as a general heuristic principle when pursuing the preparation of multi-component systems having the same topology but different composition.
通过穴状配体-222、几种金属卤化物或卤化铵以及五种双同系α,ω-二碘全氟烷烃的自组装，制备了具有博罗梅安互穿结构的超分子阴离子网络库。卤素键驱动了这些阴离子网络的形成。从所有四种使用的阳离子、所有三种使用的阴离子以及五种使用的二碘全氟烷烃中的仅两种出发，均获得了博罗梅安缠结结构。由于二碘全氟烷烃、阳离子或阴离子的变化对自组装体系的尺寸和键合具有不同的相对影响，可以得出这样的普遍结论：在确定所制备的四组分共晶体的拓扑结构时，键合（即能量特征）在这里所起的作用不如尺寸特征那么有影响力。这一结论可能适用于其他多组分体系，并且在追求制备具有相同拓扑结构但不同组成的多组分体系时，可能作为一个通用的启发式原则发挥作用。
