Synthesis and anion binding properties of novel 3,12- and 3,7-bis(4′-nitrophenyl)-azo-calix[4]pyrrole receptors†
Abstract
Two novel 3,12- and 3,7-bis(4′-nitrophenyl)-azo-5,5,10,10,15,15,20,20-octamethyl calix[4]pyrroles were prepared and studied as potential anion binders for