urea/thiourea-based receptors and Zn (II)-dipicolyl amine-based receptors. This article
specially focuses on structural aspects of the receptors and the anions for obtaining the
desire specificity along with an efficient receptor–anion interaction. Two types of receptors
have been described in this brief account; first one being the strong hydrogen bond donor
urea/thiourea derivatives, which binds the anionic analytes through hydrogen bonded …