Potassium cation induced switch in anion selectivity exhibited by heteroditopic ruthenium(II) and rhenium(I) bipyridyl bis(benzo-15-crown-5) ion pair receptors
Abstract
Cl– and H2PO4– anion selectivity properties of new heteroditopic RuII and ReI bipyridyl bis(benzo-15-crown-5) receptors are remarkably dependent upon the presence of co-bound intramolecular sandwich crown ether complexed K+.