Restricting shuttling in bis(imidazolium)…pillar[5]arene rotaxanes using metal coordination

Philipp Langer, Lixu Yang, Constance R. Pfeiffer, William Lewis, Neil R. Champness

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Metal coordination to a series of bis (imidazolium)…pillar[5]arene [2]rotaxanes through the formation of metal–carbene bonds facilitates a new strategy to restrict the shuttling motion in [2]rotaxanes. Whereas the pillar[5]arene macrocycle rapidly shuttles along the full length of the bis (imidazolium) rod for the parent [2]rotaxane, Ag(I) coordination to the imidazolium groups through the formation of N-heterocyclic carbenes leads to restricted motion, effectively confining the shuttling motion of the [2]rotaxane. The Ag(I) coordinated [2]rotaxanes can be reacted further, either removing the Ag–carbene species to recreate the parent [2]rotaxane, or reaction with more bulky Pd(II) species to further restrict the shuttling motion through steric inhibition.
Original languageEnglish
Pages (from-to)58-64
JournalDalton Transactions
Publication statusPublished - 7 Nov 2018


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