We here demonstrate the importance of ligand–ligand distance on physical property tuning of metallosupramolecular materials by utilizing model-like polyesters bearing pyridine ligands at the side groups with a controlled ligand-distance. The ligand distance is treated as the pyridine group equivalent molecular weight (MPy) and takes values of 900, 750, 550, and 420. The metal salt ZnCl2 forms coordination bonds with the pyridine ligands, generating a metallosupramolecular network. DSC and rheological measurements revealed that the glass transition temperatures and apparent activation energy (Ea) of segmental motion changes in a close correlation with 1/MPy.
- Mikihiro Hayashi
- Haruna Obara
- Akinori Takasu
