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

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

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.

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. https://doi.org/10.1039/c8dt04096f

• 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
• DOI: https://doi.org/10.1039/c8dt04096f
• Keywords: Inorganic Chemistry
• Public URL: https://nottingham-repository.worktribe.com/output/1435989
• Publisher URL: https://pubs.rsc.org/en/Content/ArticleLanding/2019/DT/C8DT04096F#!divAbstract
• Contract Date: Dec 21, 2018