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Accueil du site > Production scientifique > Reversible Guest Uptake/Release by Redox-Controlled Assembly/Disassembly of a Coordination Cage

Reversible Guest Uptake/Release by Redox-Controlled Assembly/Disassembly of a Coordination Cage

Date de publication: 22 décembre 2015

V. Croué, S. Goeb, G. Szaloki, M. Allain, M. Sallé
Angew.Chem.Int. Ed. 55 1746-1750 (2016). DOI

Travail réalisé sur le site de l’Université de Lorraine.

Abstract

Controlling the guest expulsion process from a receptor is of critical importance in various fields. Several coordination cages have been recently designed for this purpose, based on various types of stimuli to induce the guest release. Herein, we report the first example of a redox-triggered process from a coordination cage. The latter integrates a cavity, the panels of which are based on the extended tetrathiafulvalene unit (exTTF). The unique combination of electronic and conformational features of this framework (i.e. high π-donating properties and drastic conformational changes upon oxidation) allows the reversible disassembly/reassembly of the redox-active cavity upon chemical oxidation/reduction, respectively. This cage is able to bind the three-dimensional B12F122− anion in a 1:2 host/guest stoichiometry. The reversible redox-triggered disassembly of the cage could also be demonstrated in the case of the host–guest complex, offering a new option for guest-delivering control.