Capture and displacement-based release of the bicarbonate anion by calix[4]pyrroles with small rigid straps.

ABSTRACT: Two-phenoxy walled calix[4]pyrroles 1 and 2 strapped with small rigid linkers containing pyridine and benzene, respectively, have been synthesized. ¹H NMR spectroscopic analyses carried out in CDCl₃ revealed that both of receptors 1 and 2 recognize only F^- and HCO₃ ^- among various test anions with high preference for HCO₃ ^- (as the tetraethylammonium, TEA⁺ salt) relative to F^- (as the TBA⁺ salt). The bound HCO₃ ^- anion was completely released out of the receptors upon the addition of F^- (as the tetrabutylammonium, TBA⁺ salt) as a result of significantly enhanced affinities and selectivities of the receptors for

SUBMITTER: Heo NJ 

PROVIDER: S-EPMC8163245 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature