writer：Yi Yan, Weiwen Zhao, Anne Petitjean, A Faurie, G Bhagavathy
keywords：ion binding, pH trigger
source：会议
specific source：95th Canadian Chemistry Conference and Exhibition, May 26-30, 2012, Calgary.
Issue time：2012年

Crown ethers have become essential tools in Organic Chemistry, from catalytic[1] to bioactive[2] units. Recently, stimulus-responsive materials have attracted much attention.[3] In this context, we will present new macrocyclic receptors[4] whose coordination properties are switched on and off using pH. The discussion will focus on the efficient synthesis of two new types of ligands, their pH response and their selectivity within the alkali earth ion family.