Ion selectivity control in ester- and amide-armed diaza-crown ethers: sidearm effects in co-operative binding and specific transport
- 1 January 1989
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 1
- No. 1,p. 89-93
- https://doi.org/10.1039/p19890000089
Abstract
A variety of double-armed diaza-18-crown-6 derivatives were prepared, in which ester-, amide-, and ether-functionalized arms were attached as secondary donor sites. Their cation-binding behaviour was largely dependent on the nature of the donor groups on the flexible arms. Typically, an amide-armed diaza-18-crown-6 derivative enveloped Zn2+ ion in a cryptand-like cavity, while an ester-armed one formed an encapsulated complex with Na+ ion. This type of armed crown ether exhibited characteristic guest-selectivity and high binding dynamics, and provided efficient cation-transport phenomena.This publication has 4 references indexed in Scilit:
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