Tröger's Base‐Based Cuboid Constructed by Chiral Self‐Discrimination

Abstract

Cuboid, a basic geometric structure, has been widely applied in architecture and mathematics. In chemistry, the introduction of cuboid structures always provides a specific structural shape, enhances the stability of the structure and improves the performance of materials. Herein, a simple strategy exploiting self‐discrimination to construct a cuboid‐stacking crystal material is proposed, in which a chiral macrocycle (TBBP) based on Tröger's base (TB) and benzophenone (BP) was synthesized as the building element of the cuboid. The cuboid is designed to be transformable compared with cuboid structures in previous work. For this reason, it is considered that the cuboid‐stacking structure can be transformed through external stimulation. Iodine vapor is selected as the external stimulus to transform the cuboid‐stacking structure due to the favorable interaction between iodine and the cuboid. The changes in the stacking mode of TBBP is studied by single‐crystal X‐ray diffraction (SCXRD) and powder X‐ray diffraction (PXRD). To our surprise, this Tröger's base‐based cuboid shows strong iodine adsorption capacity up to 3.43 g g−1 and exhibits potential as a crystal material for iodine adsorption.

1D Coordination Polymers Constructed from Pyridine-2,6-Dicarboxamide Ligands Showing Selective and Recyclable Adsorption toward Methanol Vapor

“…The equatorial positions of each Cd­(II) ion are coordinated by two L 1 ligands with P -helicity and two L 1 ligands with M -helicity, and the axial positions are occupied by two chloride anions. The extended coordination of the ligands with Cd­(II) ions leads to the formation of a 1D mesomeric looped chain polymer, in which there are two helical chains with P - and M -helicity, respectively, suggesting a self-discrimination process (Figure b). , Moreover, the 1D mesomeric chains are further linked via weak intermolecular hydrogen bonds, which generate a 3D framework with 1D channels (Figure c).…”

“…The extended coordination of the ligands with Cd(II) ions leads to the formation of a 1D mesomeric looped chain polymer, in which there are two helical chains with P-and M-helicity, respectively, suggesting a self-discrimination process (Figure 5b). 55,56 Moreover, the 1D mesomeric chains are further linked via weak intermolecular hydrogen bonds, which generate a 3D framework with 1D channels (Figure 5c).…”

Recent progress in iodine capture by macrocycles and cages

“…TBB[3]s 34 and TBBP . 49 On the one hand, TBB[3]s , decorated with alkyl chains of differing lengths (methyl, ethyl and butyl), were investigated for iodine adsorption. Among them, nonporous amorphous powder M[3] (Fig.…”