Özcan, FatihMalkondu, SaitKoçak, AhmetKoçak, NuriyeYılmaz, Mustafa2020-03-262020-03-2620131388-31271573-1111https://dx.doi.org/10.1007/s10847-012-0215-8https://hdl.handle.net/20.500.12395/29867The present study describes the synthesis of a novel extractant p-tert-butyl-calix[4]azacrown ionophore (5) and evaluation of its extraction capability toward dichromate ion from aqueous solution. At first, p-tert-butyl-calix[4]azacrown ionophore (5) has been synthesized from the condensation of p-tert-butyl-calix[4]arene diamine (3) with N-(4-formylphenyl)-aza-15-crown-5 (4). The studies regarding the removal of dichromate ion from the aqueous solutions have been carried out in the liquid-liquid extraction systems. The extraction results showed that p-tert-butyl-calix[4]azacrown derivative (5) exhibited generally higher affinity towards dichromate ion than both 3 and 4 at all studied pHs.en10.1007/s10847-012-0215-8info:eu-repo/semantics/closedAccessCalixazacrownDichromate anionLiquid-liquid extractionArticle7603.04.2020443449Q3WOS:000323910900022Q2