Guest and subunit exchange in self-assembled ionophores

Authors
Cai, MM Sidorov, V Lam, YF Flowers, RA Davis, JT
Citation
Mm. Cai et al., Guest and subunit exchange in self-assembled ionophores, ORG LETT, 2(12), 2000, pp. 1665-1668
Citations number
16
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
ORGANIC LETTERS
ISSN journal
15237060 → ACNP
Volume
2
Issue
12
Year of publication
2000
Pages
1665 - 1668
Database
ISI
SICI code
1523-7060(20000615)2:12<1665:GASEIS>2.0.ZU;2-F
Abstract
[GRAPHICS] Self-assembled ionophores, formed by hydrogen bonding of isoG 1 around a ca tion, are dynamic structures. Multinuclear NMR spectroscopy in CD3CN-CDCl3 showed that cation exchange is >10(4) faster than exchange of isoG 1 ligand in (isoG 1)(10)-Cs+ Ph4B-. The cationic guest also affected the kinetic st ability of the complex. 2D-EXSY NMR experiments in CDCl3 showed that ligand exchange was 2 orders of magnitude faster for the Li+-decamer than for the Cs+-decamer.