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Synergistic effect of ligating and ionic functions, prearranged on a calix[4]arene

2006; Royal Society of Chemistry; Issue: 38 Linguagem: Inglês

10.1039/b608222j

1364-548X

L. Mikulasek, Bohumı́r Grüner, C. Danila, Volker Böhmer, Josef Čáslavský, P. Selucký,

Crystallography and molecular interactions

The covalent attachment of two CMPO-functions and two anionic Cosan groups to the narrow rim of tert-butylcalix[4]arene leads to a dramatic increase of the extraction efficiency for the cone isomer; Am(3+) is removed from 5 x 10(-8) M solution to more than 99% by a single extraction step with a 3 x 10(-6) M solution of the calixarene.