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An ion-pair receptor comprising urea groups and N-benzyl-aza-18-crown-6: effective recognition and liquid–liquid extraction of KCl salt

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cris.lastimport.scopus2024-02-12T19:31:56Z
dc.abstract.enCompound 1 was designed and prepared as a heteroditopic ion-pair receptor that contains two urea groups for anion complexation and N-benzyl-18-crown-6 for cation recognition. These ion-binding domains are assembled together by the L-ornithine scaffold. Qualitative cation coordination studies of receptor 1, supported by quantitative data received for monotopic N-(3-nitrobenzyl)-aza-18-crown-6 (3a), have shown that 1 has a strong affinity for Na+, K+ and NH4+ cations. Anion binding studies revealed that in the absence of cations coordinated to 1 (TBA salts), anions are bound with a relatively moderate strength with the selectivity: BzO− > AcO− > Cl−> NO2− > Br−. However, in the presence of cations coordinated to the N-benzyl-18-crown-6 the anion binding affinity increases considerably with the notable exception of carboxylates. For example, chloride binding is increased by over five times in the presence of K+ cations and the selectivity trend for salt binding is: KCl > KOBz > KOAc > KNO2 > KBr. Liquid/liquid extraction studies revealed that receptor 1 is an effective extractant for KCl and NH4Cl salts from aqueous to organic phase.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorZakrzewski, Maciej
dc.contributor.authorZałubiniak, Dominika
dc.contributor.authorPiątek, Piotr
dc.date.accessioned2024-01-24T16:43:13Z
dc.date.available2024-01-24T16:43:13Z
dc.date.issued2018
dc.description.financeNie dotyczy
dc.description.number2
dc.description.volume47
dc.identifier.doi10.1039/C7DT03696E
dc.identifier.issn1477-9226
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/100931
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofDalton Transactions
dc.relation.pages323-330
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.titleAn ion-pair receptor comprising urea groups and N-benzyl-aza-18-crown-6: effective recognition and liquid–liquid extraction of KCl salt
dc.typeJournalArticle
dspace.entity.typePublication