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Solvent extraction of inorganic and organic cations by octakis-O-diphenoxyphosphoryl-tetramethylcalix[4]resorcinarene

Taraszewska J., Koźbiał M.

Chemia Analityczna

2002

Vol. 47, No. 3

409-418

Extraction of alkali metal, alkaline-earth metal Mg(II), Ca(II) cations and ammonium picra-tes as well as of Eu(IIl) and La(IlI) nitrates by complexation with octakis-O-diphenoxyphos-phoryl-tetramethylcalix[4] resorcinarene was studied by a liquid-liquid extraction from aqueous phase into chloroform. Extraction percentages (E%), stoichiometry and overall extraction constants (Kex) were determined. E% increased in the order lanthanum, europium >alka-line earth cations >ammonium cations>alkali cations. The stoichiometry of the complexes was 1:1. Kex increased with the increase of cation charge.

Zbadano ekstrakcję z fazy wodnej pikrynianów metali alkalicznych, ziem alkalicznych Mg(II), Ca(II) i alkiloammoniowych oraz azotanów Eu(III) i La(lII) w wyniku komplekso-wania roztworem oktakis- difenoksyfosforylo-tetrametylokaliks[4]rezorcynarenu w chloroformie. Wyznaczono procenty ekstrakcj i (E%), stechiometrie, i stale ekstrakcj i (Kex). E% wzrastał w kolejności, lantan, europ >kationy metali ziem alkalicznych >kationy alkiloamo-niowe >kationy metali alkalicznych. Stechiometria kompleksów była1: 1. Kex wzrastała ze wzrostem ładunku kationu

Transport studies of inorganic and organic cations across liquid membranes containing Mannich-base calix[4]resorcinarenes

Pietraszkiewicz O., Kozbiał M., Pietraszkiewicz M.

Polish Journal of Chemistry

1998

Vol. 72, nr 5

886-892

Three calix[4]resorcinarenes, two of them incorporating Mannich-type amino functions (C2 and C3), have been studied in respect to their ionoselectivities towards inorganic alkali cations as well as for organic primary ammonium cations, by ion transport across the bulk liquid membrane and extraction experiments. The ligand C3 displayed particular ionoselectivity for lithium ion, as a carrier in toluene membrane. The discrimination of organic primary ammonium ions was remarkable in liquid membranes, and the pattern of this discrimination depended on the membrane composition. Selectivities for both inorganic and organic ions depended significantly on the membane composition, the substituent in the calix[4]resorcinarene, and the counterion present in the salts studied.