Immobilization of Cyclic Alkylamine Calix[4]arene Derivatives on Merrifield Resin: Evaluation of Extraction Ability Toward Dichromate

Abstract

Two new calix[4]arene‐based polymeric resins were synthesized via nucleophilic substitution reactions involving 5,11,17,23‐tetrakis(N‐piperidinomethyl)‐25,26,27,28‐tetrahydroxycalix[4]arene ( 2 ) and 5,11,17,23‐tetrakis[4‐carboethoxy‐N‐piperidino]‐25,26,27,28‐tetrahydroxycalix[4]arene ( 4 ) as precursors with Merrifield resin. Extraction studies were performed by liquid–liquid extraction and solid–liquid adsorption procedures. The monomeric compounds showed excellent extraction ability toward dichromate in liquid–liquid extraction systems. Polymeric resin 3 with calixarene moieties exhibited high adsorption properties, while resin 5 showed lower adsorption of dichromate in solid–liquid extractions.

Keywords:

• calixarenes
• polymers
• liquid–liquid extraction
• adsorption
• dichromate

Acknowledgements

We thank the Research Foundation of The Selçuk University (BAP) and the Texas Higher Education Coordinating Board's Technology Development and Transfer Program (RAB) for financial support of this work.