Abstract

Halogen bonding is emerging as a significant driving force for supramolecular self-assembly and has aroused great interest during the last two decades. Among the various halogen-bonding donors, we take notice of the ability of 1,4-diiodotetrafluorobenzene (1,4-DITFB) to co-crystallize with diverse halogen-bonding acceptors in the range from neutral Lewis bases (nitrogen-containing compounds, N-oxides, chalcogenides, aromatic hydrocarbons and organometallic complexes) to anions (halide ions, thio/selenocyanate ions and tetrahedral oxyanions), leading to a great variety of supramolecular architectures such as discrete assemblies, 1D infinite chains and 2D/3D networks. Some of them act as promising functional materials (e.g. fluorescence, phosphorescence, optical waveguide, laser, non-linear optics, dielectric and magnetism) and soft materials (e.g. liquid crystal and supramolecular gel). Here we focus on the supramolecular structures of multicomponent complexes and their related physicochemical properties, highlight representative examples and show clearly the main directions that remain to be developed and improved in this area. From the point of view of crystal engineering and supramolecular chemistry, the complexes summarized here should give helpful information for further design and investigation of the elusive category of halogen-bonding supramolecular functional materials.

中文翻译：

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潜在双位二碘四氟苯共结晶中的卤素键：构建多组分超分子组装体的强大工具

 抽象的

卤素键正在成为超分子自组装的重要驱动力，并在过去二十年引起了人们的极大兴趣。在各种卤素键供体中，我们注意到 1,4-二碘四氟苯 (1,4-DITFB) 能够与中性路易斯碱（含氮化合物、 N-氧化物、硫属化物、芳香烃和有机金属配合物）到阴离子（卤化物离子、硫代/硒氰酸根离子和四面体含氧阴离子），从而产生多种超分子结构，例如离散组装体、1D无限链和2D/3D网络。其中一些作为有前途的功能材料（例如荧光、磷光、光波导、激光、非线性光学、介电和磁性）和软材料（例如液晶和超分子凝胶）。在这里，我们重点关注多组分复合物的超分子结构及其相关的物理化学性质，突出代表性实例，并清楚地展示该领域仍有待开发和改进的主要方向。从晶体工程和超分子化学的角度来看，这里总结的配合物应该为进一步设计和研究难以捉摸的卤素键合超分子功能材料提供有用的信息。