Shackling Effect Induced Property Differences in Metallo-Supramolecular Polymers

We demonstrate here
the synthesis of a novel class of metallo-supramolecular
polymers with shackled structure, via the coordination of cyclic di­(bis-terpyridine-triphenyl
ether ester) ligands with ruthenium­(II) ions. The constraint from
the ring topology via the shackling of ligands provides novel properties
to these metallo-supramolecular polymers, including the formation
of dendritic crystals, red-shift of absorption bands in the UV–vis
spectra from interchain charge-transfer transitions, and a typical
flash-type memory behavior.