Bis(amido)calix[4]arenes in the pinched cone conformation as tuneable hydrogen-bonding anion receptors
- 1 January 1997
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Chemical Communications
- No. 6,p. 573-574
- https://doi.org/10.1039/a607726i
Abstract
Calix[4]arene units functionalized at the 1,3-positions of the upper rim with amido groups, –NHC(O)X, act as neutral, hydrogen-bonding receptors for hydrogen sulfate, dihydrogen phosphate, acetate, benzoate, nicotinate, oxalate, terephthalate, isophthalate and fumarate with binding strength and selectivity tunable by varying the electron-withdrawing ability of the terminal substituent X (X = CH 2 Cl, CHCl 2 , CCl 3 ).Keywords
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