Finding a receptor design for selective recognition of perrhenate and pertechnetate: hydrogen vs. halogen bonding†
Abstract
Receptors bearing hydrogen and halogen bond donors for recognition of perrhenate and pertechnetate were designed and studied. Acyclic hosts with N–H and C–H binding sites showed the best selectivity for TcO4− and ReO4− over spherical and more basic tetrahedral anions.