Surprisingly selective sulfate extraction by a simple monofunctional di(imino)guanidinium micelle-forming anion receptorElectronic supplementary information (ESI) available: Preparative details, Karl Fischer titrations, and small-angle X-ray scattering. CCDC 1851818. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c8cc05115a

We report a novel di(imino)guanidinium anion extractant with unparalleled selectivity for sulfate in a liquid-liquid separation system. In addition to a 4.4 order-of-magnitude enhancement in affinity compared to a standard benchmark, our alkylated di(imino)guanidinium receptor is economically synthe...

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Bibliographic Details
Main Authors Williams, Neil J, Seipp, Charles A, Garrabrant, Kathleen A, Custelcean, Radu, Holguin, Erick, Keum, Jong K, Ellis, Ross J, Moyer, Bruce A
Format Journal Article
Published 06.09.2018
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Summary:We report a novel di(imino)guanidinium anion extractant with unparalleled selectivity for sulfate in a liquid-liquid separation system. In addition to a 4.4 order-of-magnitude enhancement in affinity compared to a standard benchmark, our alkylated di(imino)guanidinium receptor is economically synthesized and features good compatibility with application-relevant aliphatic solvents. Small-angle X-ray scattering results reveal the formation of reverse-micelles, which together with the significant organic-phase water content challenge traditional notions of selectivity in extraction of superhydrophilic anions. A simple di(imino)guanidinium anion receptor exhibits unparalleled selectivity for sulphate in a liquid-liquid separation system.
Bibliography:For ESI and crystallographic data in CIF or other electronic format see DOI
10.1039/c8cc05115a
1851818
Electronic supplementary information (ESI) available: Preparative details, Karl Fischer titrations, and small-angle X-ray scattering. CCDC
ISSN:1359-7345
1364-548X
DOI:10.1039/c8cc05115a