Deuterium equilibrium isotope effects in a supramolecular receptor for the hydrochalcogenide and halide anions

Abstract

We highlight a convenient synthesis to selectively deuterate an aryl C–H hydrogen bond donor in a supramolecular anion receptor and use competitive titrations to study the deuterium equilibrium isotope effects (DEIE) in binding HS−, Cl−, and Br−.

Disrupting the Hofmeister bias in salt liquid–liquid extraction with an arylethynyl bisurea anion receptor

“…We have introduced a family of arylethynyl bisurea receptors and studied their anion binding ability in homogenous organic solutions. [25][26][27][28][29] The rigidity of the arylethynyl pivot is thought to impart greater anion binding affinity and selectivity in this tweezer-type receptor, which also features an active C-H donor group to complement its four N-H donors. We have also shown that the arylethynyl urea scaffold can be used in the design of receptors capable of selective extraction of hydrogen sulfate from sulfuric acid.…”