Viologen-cucurbituril host/guest chemistry - redox control of dimerizationversusinclusion

Parastoo Dalvand, Katia Nchimi Nono, Dinesh Shetty, Farah Benyettou, Zouhair Asfari, Carlos Platas-Iglesias, Mark A. Olson, Ali Trabolsi, Mourad Elhabiri

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Two calix[4]arene systems,C234+andC244+- where 2 corresponds to the number of viologen units and 3-4 corresponds to the number of carbon atoms connecting the viologen units to the macrocyclic core - have been synthesized and led to the formation of [3]pseudorotaxanes when combined with eitherCB[7]orCB[8]. The [3]pseudorotaxanes spontaneously dissociate upon reduction of the bipyridinium units as the result of intramolecular dimerization of the two face-to-face viologen radical cations.CB[7]andCB[8]-based [2]pseudorotaxanes containing monomeric viologen guest model compounds,MC32+andMC4+, do not undergo decomplexation and dimerization following electrochemical reduction of their bipyridinium units.

Original languageBritish English
Pages (from-to)29543-29554
Number of pages12
JournalRSC Advances
Volume11
Issue number47
DOIs
StatePublished - 9 Aug 2021

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