Calix[4]arene-crown-5 as a selective extraction reagents for K+/H+, Rb+/H+ and Rb+/Cs+ separations-Reference-Cited by-同舟云学术

Calix[4]arene-crown-5 as a selective extraction reagents for K+/H+, Rb+/H+ and Rb+/Cs+ separations

Published:2021-05-20 Issue:0 Volume:0 Page:
ISSN:2193-3405
Container-title:Radiochimica Acta
language:en
Short-container-title:

Author:

Vaňura Petr¹,Makrlík Emanuel²,Selucký Pavel³

Affiliation:

1. Department of Analytical Chemistry , University of Chemistry and Technology, Prague , Technická 5, 166 28 Prague 6 , Czech Republic

2. Faculty of Environmental Sciences, Czech University of Life Sciences, Prague , Kamýcká 129, 165 21 Prague 6 – Suchdol , Czech Republic

3. Nuclear Research Institute , 250 68 Řež , Czech Republic

Abstract

Abstract From extraction experiments, the exchange extraction constants corresponding to the general equilibriums M+ (aq) + NaL+ (org) ⇔ ML+ (org) + Na+ (aq) or M+ (aq) + CsL+ (org) ⇔ ML+ (org) + Cs+ (aq), which take place in the two-phase water–nitrobenzene extraction system (M+ = Li+, H3O+, Ag+, K+, NH4 +, Tl+, Rb+; L = calix[4]arene-bis crown5(1,3-alternate), 26,28-dipropoxycalix[4]arene-crown-5(1,3-alternate), 11,23-dibromo-25,28-dipropoxycalix[4]arene-crown-5 (1,3-alternate) and 1,3-alternate-25,27-dihydroxycalix[4]arene-crown-5; aq = aqueous phase, org = organic phase), were evaluated. The stability constants of the NaL+ and CsL+ complexes were calculated from the extraction of the respective picrates in the system of water–nitrobenzene solution of L. Further, the stability constants of the ML+ complexes in nitrobenzene saturated with water were determined. High selectivities were found in some systems under study.

Publisher

Walter de Gruyter GmbH

Subject

Physical and Theoretical Chemistry

Link

https://www.degruyter.com/document/doi/10.1515/ract-2020-0111/pdf

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