Polymer Supported Calix[4]Arene Derivatives for the Extraction of Metals and Dichromate Anions

Three newly synthesized polymer supported calix[4]arene ionophores (7-9) were synthesized, and their ion binding properties toward selected alkali (Li +, Na +, K +, Cs +) and transition metal (Hg 2+, Ni 2+, Cu 2+, Co 2+, Cd 2+, and Pb 2+) cations were investigated. It has been observed that these ionophores are not selective toward a particular metal cation but show better ion binding property as compared to monomeric calixarene derivatives (2 and 6). Ionophore 6 and its supported polymer were also employed in dichromate anion extraction experiments. The polymeric ionophore (9) was found an effective extractant for dichromate anion even at pH 7.