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Alkyl substituted 4-pyrrolidinopyridinium salts encapsulated in the cavity of cucurbit[10]uril

Xu, Weitao; Liu, Ming; Escaño, Mary Clare; Redshaw, Carl; Bian, Bing; Fan, Ying; Tao, Zhu; Xiao, Xin

Authors

Weitao Xu

Ming Liu

Mary Clare Escaño

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Professor Carl Redshaw C.Redshaw@hull.ac.uk
Professor of Inorganic Materials Chemistry and REF Lead for Chemistry

Bing Bian

Ying Fan

Zhu Tao

Xin Xiao

Abstract

The interaction between cucuribit[10]uril (Q[10]) and a series of 4-pyrrolidinopyridinium salts bearing aliphatic substituents at the pyridinium nitrogen, namely 4-(C4H8N)C5H5NRBr, where R = Et (g1), n-butyl (g2), n-pentyl (g3), n-hexyl (g4), n-octyl (g5), n-dodecyl (g6), has been studied in aqueous solution by 1H NMR spectroscopy, electronic absorption spectroscopy and mass spectrometry. The results revealed that the guests g1–g5 are located completely inside the cavity differing only in the orientation of g1, g4 and g5 which are aligned with the portal, whilst g2 and g3 are perpendicular to it. For g6, the tetrahydropyrrole moiety remains outside of the portal. DFT calculations confirm the stability of the guests in the Q[10] and the possibility of their curved structure inside the Q[10].

Journal Article Type Article
Journal New Journal of Chemistry
Print ISSN 1144-0546
Electronic ISSN 1369-9261
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Institution Citation Xu, W., Liu, M., Escaño, M. C., Redshaw, C., Bian, B., Fan, Y., …Xiao, X. (in press). Alkyl substituted 4-pyrrolidinopyridinium salts encapsulated in the cavity of cucurbit[10]uril. New journal of chemistry = Nouveau journal de chimie, https://doi.org/10.1039/c9nj01089k
DOI https://doi.org/10.1039/c9nj01089k
Keywords Materials Chemistry; General Chemistry; Catalysis
Publisher URL https://pubs.rsc.org/en/Content/ArticleLanding/2019/NJ/C9NJ01089K#!divAbstract
Additional Information This is the accepted manuscript of an article published in New journal of chemistry, 2019. The version of record is available at the DOI link in this record.