Tabakci, MustafaTabakci, BegumBeduk, A. Dincer2020-03-262020-03-2620120040-4020https://dx.doi.org/10.1016/j.tet.2012.03.103https://hdl.handle.net/20.500.12395/28448We synthesized the new calix[4]arene amines bearing two and four imidazole or tert-butylamine moieties (9a,b/10a,b) by the reaction of di-or tetra-tosylated calix[4]arene derivatives (7 and 8, respectively) with 1-(3-aminopropyl)imidazole and/or tert-butylamine, respectively. After the characterization of 9a,b/10a,b their extraction abilities toward Cr(VI) anionic species (CAS) was evaluated and compared by the liquid liquid extraction method. The extraction results revealed that calix[4]arene amine having four imidazole groups (10a) was an efficient anion receptor for CAS. Moreover, the extraction of CAS by 10a in the presence of other anions such as Cl-, NO3-, and PO43- showed that 10a could be a selective anion receptor for CAS in the presence of those anions. (C) 2012 Elsevier Ltd. All rights reserved.en10.1016/j.tet.2012.03.103info:eu-repo/semantics/closedAccessCalix[4]areneAmineAnion receptorCr(VI) anionic speciesExtractionArticle682241824186Q2WOS:000304295000011Q2