Europium Directed Synthesis of Enantiomerically Pure Dimetallic Luminescent “Squeezed” Triple‐Stranded Helicates; Solution Studies

Triple-stranded helix: The formation of two novel chiral enantiomerially pure dimetallic (EuIII) triple stranded helicates (L3Eu2) was monitored in solution by observing the changes in the EuIII centered emission as well as in the absorption and the fluorescence spectra of ligands 3 and 4. Using CD and circular polarized luminescence (CPL), arising from the EuIII centers, the absolute configuration of these chiral supramolecular structures was assigned.