Complexation of Racemic 2,6‐Helic[6]arene and Its Hexamethyl‐Substituted Derivative with Quaternary Ammonium Salts, N‐Heterocyclic Salts, and Tetracyanoquinodimethane

作者：Geng‐Wu Zhang, Pengfei Li, Han‐Xiao Wang, Ying Han, Chuan‐Feng Chen · 发表于：Chemistry - A European Journal · 年份：2017 · DOI：10.1002/chem.201605394 · 被引用次数：27 · 研究领域：Supramolecular Chemistry and Complexes、Molecular Sensors and Ion Detection、Crystallography and molecular interactions

Abstract Complexation of racemic 2,6‐helic[6]arene 1 and its hexamethyl‐substituted derivative 2 with quaternary ammonium salts, N‐heterocyclic salts, and tetracyanoquinodimethane have been described in detail. It was found that host 2 could form stable complexes with acetyl choline, thiaacetyl choline, N , N , N ‐trimethylbenzenammonium salt, pyridinium, and 4,4′‐bipyridinium salts in solution and/or in the solid state. The unsubstituted macrocycle 1 showed more significant complexation with the widely tested quaternary ammonium salts and N‐heterocyclic salts, and exhibited stronger complexation towards the guests than its derivative 2 . Moreover, it was found that macrocycle 1 and its derivative 2 could also complex with neutral electron‐deficient tetracyanoquinodimethane (TCNQ), and the association constants were determined to be 2840±94 and 1358±46 m −1 , respectively. These results could make this new macrocycle and its derivatives find wide applications in the design and construction of functional supramolecular assemblies.