Using specific C–H⋯Cl−interactions, oligo(aryl-triazole) based transporters realized efficient/selective Cl−transmembrane transport by adjusting their molecular lipophilicity and anion affinity.
for binding halideanions. 1H NMR titration experiments carried out in DMSO-d6/CDCl3 (15/85, v/v) demonstrated that the short oligo(aryltriazole)s backbone 1 could not bind halideanions unless that amide H-bond donors were incorporated at the termini of the oligomer. Terminal substituents on oligo(aryltriazoleamide)s foldamers 2–4 display a considerable influence on the binding affinities of the foldamers