Binding of ion pairs and neutral guests by aryl-extended meso‑p-hydroxyphenyl calix[4]pyrrole: The interplay between three binding sites

Cross-Linked Supramolecular Polymer Based on Calix[4]pyrrole-Decorated Pillar[5]arene and Its Application in Micropollutant Removal

“…This small peak shift was also distinctive in the case of pyrrole CH peaks where the upfield shift amount is about Δδ = 0.04 ppm when compared with the ones that belong to free 1 at 5.86 ppm. Calix[4]­pyrroles exhibit significant chemical shift changes upon strong complexation with an anion in which pyrrole-NH and -CH protons shift opposite directions. , The above results clearly indicate that TBAT was not expected to perform as a strong guest for the formation of a cross-linked supramolecular architecture when complexed with 1 . In contrast, remarkable changes were observed in the 1 H NMR spectrum of 1 when TBAS was used as a guest moiety.…”

Anion binding and transport with meso-alkyl substituted two-armed calix[4]pyrroles bearing urea and hydroxyl groups

“…Thus, the mode of interaction of cis-1 with TMACl where the cation is located in the shallow cavity and the anion is bound by the macrocycle in cone conformation is characteristic to most calix [4]pyrroles in the solid state, whereas meso-phydroxyphenyl calix [4]pyrrole has displayed exo-cavity chloride complexation by hydroxyl groups. 44…”

A poly-pseudorotaxane constructed by threading pillar[5]arene onto an ion-pair recognition-based calix[4]pyrrole supramolecular polymer

“…1 They also allow the modulation of binding interactions between receptors and ions in terms of selectivity and strength. 2 Additionally, they provide an opportunity to exploit cooperativity in ion pair binding. 3 Various macrocyclic architectures ( e.g.…”