Influence of Amide Connectivity on the Hydrogen‐Bond‐Directed Self‐Assembly of [n.n]Paracyclophanes
作者:Will R. Henderson、Ajeet Kumar、Khalil A. Abboud、Ronald K. Castellano
DOI:10.1002/chem.202003909
日期:2020.12.23
here is the synthesis and self‐assembly characterization of [n.n]paracyclophanes ([n.n]pCps, n=2, 3) equipped with anilide hydrogen bonding units. These molecules differ from previous self‐assembling [n.n]paracyclophanes ([n.n]pCps) in the connectivity of their amide hydrogen bonding units (C‐centered/carboxamide vs. N‐centered/anilide). This subtle change results in a ≈30‐fold increase in the elongation
此处报道的是具有苯胺氢键单元的[nn]对环环烷([nn] pCps,n = 2,3)的合成和自组装表征。这些分子在酰胺氢键单元(C中心/羧酰胺vs. N中心/苯胺)的连接性方面与以前的自组装[nn]对环环烷([nn] pCps)不同。与之前报道的[2.2] pCp-4,7相比,这种微妙的变化导致[2.2] pCp-4,7,12,15-四苯胺([2.2] pCpNTA)的伸长常数增加了约30倍,12,15-四甲酰胺([2.2] pCpTA),与以前报道的[3.3] pCp-5,8,14 ,[3.3] pCp-5,8,14,17-四苯胺([3.3] pCpNTA)的伸长常数相比,增加了约300倍, 17-四甲酰胺([3.3] pCpTA)。当比较[2.2] pCpTA和[3.3] pCpTA单体时,[nn] pCpNTA单体也代表了先前报道的溶液相组装强度趋势的逆转。组装差异的根源是[nn]