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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.

Authors

Philipp Langer

Lixu Yang

Constance R. Pfeiffer

William Lewis

Neil R. Champness



Abstract

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.

Journal Article Type Article
Publication Date Nov 7, 2018
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
APA6 Citation 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. doi:10.1039/c8dt04096f
DOI https://doi.org/10.1039/c8dt04096f
Keywords Inorganic Chemistry
Publisher URL https://pubs.rsc.org/en/Content/ArticleLanding/2019/DT/C8DT04096F#!divAbstract

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