A 4-state acid–base controlled molecular switch based on a host–guest system

Abstract

A novel ZnII funnel complex that presents three phenol functions within the calix[6]arene macrocycle is described. Host-guest studies, monitored by 1H NMR spectroscopy, evaluate the impact of the replacement of...

Synthesis of C3v-Symmetrical 1,3,5-Tris-Protected Calix[6]arene-Based Molecular Platforms

“…The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.joc.3c02790. General information, experimental procedures, spectroscopic characterization data [one-dimensional and 2D NMR spectra ( 1 H, 13 C, COSY, HSQC, and HMBC), and ultraviolet−visible spectra], and HMRS data of the new compounds (PDF)…”

“…1,3,5-Tris- O -Me- p - t Bu-calix­[6]­arene 1 Me , featuring three alternate phenol units protected by methyl groups (i.e., anisole moieties), is a key C 3 v -symmetrical platform in the chemistry of calix[6]­arenes. It has been employed in the design of pseudorotaxanes, molecular machines, sensors, molecular transporters, a supramolecular protection unit, molecular switches, stationary phase selectors for gas chromatography, and receptors for cations, anions, and neutral molecules . A large family of biomimetic ligands for metal ions, including zinc or copper, have been notably developed over the past three decades .…”

Supramolecular Handshakes: Characterization of Urea‐Carboxylate Interactions Within Calixarene Frameworks

“…[2][3][4][5][6] A tool that enables these prerequisites is provided by non-covalent synthesis, where self-assembly or hetero-assembly of molecular monomers into a capsule is realized via intermolecular interactions such as metal-ligand coordination bonds, [7][8][9][10][11] hydrogen bonds, [12][13][14] ionic interactions, [15] halogen [16] or chalcogen [17] bonds. The control over the association can be imposed by adjusting the physico-chemical properties of the solution (e. g. pH, [18,19] temperature, ionic strength). Disassembly of capsules can also be controlled by changing the oxidation state of the constituents [20] or by UV/Vis-illumination.…”