Selective recognition and extraction of KBr via cooperative interactions with a urea functionalized crown ether dual-host†
Abstract
Selective solid–liquid extraction of KBr is demonstrated for the first time with a crown ether based pentafluorophenyl urea functionalized dual-host receptor. 1H-NMR and ITC studies have been carried out to illustrate the effect of cooperativity towards the recognition of alkali metal salts.