A pH-and Metal-Actuated Molecular Shuttle in Water - Archive ouverte HAL Access content directly
Journal Articles Chemistry - A European Journal Year : 2023

A pH-and Metal-Actuated Molecular Shuttle in Water


The structure of the Viologen-Phenylene-Imidazole (VPI) guest, previously shown to be bound by cucurbit[7]uril (CB[7]) with binding modes depending on pH and silver ions, has been extended by adding hydrophobic groups on the two extremities of VPI before investigations of CB[7] binding by NMR, ITC, X-ray diffraction, UV-vis and fluorescence spectroscopies. With an imidazole station extended by a naphthalene group (VPI-N), binding modes of CB[7] are similar to those previously observed. However, with the viologen extended by a tolyl group (T-VPI), CB[7] preferentially sits on station T, shuttling between the T and P stations at acid pH or after Ag + addition. The CB[7]•T-VPI complex thus behaves as a metal-actuated thermodynamic stop-and-go molecular shuttle featured by fast and autonomous ring translocation between two stations and a continuum for fractional station occupancy solely and easily controlled by Ag + concentration.
Fichier principal
Vignette du fichier
HAL_VPI-N T-VPI CB[7].pdf (1.04 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-04087079 , version 1 (02-05-2023)



Amine Kriat, Simon Pascal, Brice Kauffmann, Yann Ferrand, David Bergé-Lefranc, et al.. A pH-and Metal-Actuated Molecular Shuttle in Water. Chemistry - A European Journal, In press, pp.e202300633. ⟨10.1002/chem.202300633⟩. ⟨hal-04087079⟩
32 View
7 Download



Gmail Facebook Twitter LinkedIn More