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

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


Philipp Langer

Lixu Yang

Constance R. Pfeiffer

William Lewis

Neil R. Champness


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 Agcarbene species to recreate the parent [2]rotaxane, or reaction with more bulky Pd(II) species to further restrict the shuttling motion through steric inhibition.


Langer, P., Yang, L., Pfeiffer, C. R., Lewis, W., & Champness, N. R. (2018). Restricting shuttling in bis(imidazolium)…pillar[5]arene rotaxanes using metal coordination. Dalton Transactions, 48(1), 58-64.

Journal Article Type Article
Acceptance Date Oct 31, 2018
Online Publication Date Jan 3, 2019
Publication Date Nov 7, 2018
Deposit Date Dec 21, 2018
Publicly Available Date Nov 8, 2019
Journal Dalton Transactions
Print ISSN 1477-9226
Electronic ISSN 1477-9234
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 48
Issue 1
Pages 58-64
Keywords Inorganic Chemistry
Public URL
Publisher URL!divAbstract


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