A n Insight into Anion Extraction by Amphiphiles: Hydrophobic Microenvironments as a Requirement for the Extractant Selectivity

0577528 - ÚCHP 2024 RIV US eng J - Journal Article
Salvadori, Karolína - Onali, A. - Mathez, G. - Eigner, V. - Dendisová, M. - Matějka, P. - Müllerová, Monika - Brancale, A. - Cuřínová, Petra
A n Insight into Anion Extraction by Amphiphiles: Hydrophobic Microenvironments as a Requirement for the Extractant Selectivity.
ACS Omega. Roč. 8, č. 46 (2023), s. 44221-44228. ISSN 2470-1343. E-ISSN 2470-1343
R&D Projects: GA ČR(CZ) GA20-07833S
Institutional support: RVO:67985858
Keywords : carboxylic-acids * recognition * phosphate
OECD category: Organic chemistry
Impact factor: 4.1, year: 2022
Method of publishing: Open access
https://pubs.acs.org/doi/10.1021/acsomega.3c06767

Coupling of electron-deficient urea units with aliphatic chains gives rise to amphiphilic compounds that bind to phosphate and benzoate anions in the hydrogen bonding competitive solvent (DMSO) with KAss = 6 580 M−1 and KAss = 4 100 M−1, respectively. The anchoring of these receptor moieties to the dendritic support does not result in a loss of anion binding and enables new applications. Due to the formation of a microenvironment in the dendrimer, the high selectivity of the prepared compound toward benzoate is maintained even in the presence of aqueous media during extraction experiments. In the presence of binding sites at 5 mM concentration, the amount of benzoate corresponding to the full binding site occupancy is transferred into the chloroform phase from its 10 mM aqueous solution. A thorough investigation of the extraction behavior of the dendrimer reported here, supported by a series of molecular dynamics simulations, provides new insight into the undamental principles of extraction of inorganic anions by amphiphiles.

Permanent Link: https://hdl.handle.net/11104/0346646