Superior anion-binding properties of a cryptand-like oligopyrrolic macrocycle

Abstract

Recognition by strapped system: Cryptand-type calix[4]pyrrole are shown to exhibit a highly enhanced affinity towards anionic guests as compared to other reported calix[4]pyrroles (see figure). The results obtained provide some insights as to how calix[4]pyrrole-based anion receptors may be designed to achieve higher affinity and selectivity. © 2010 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.