Redox-Active Supramolecular Heteroleptic M₄ L₂ L'₂ Assemblies with Tunable Interior Binding Site.

ABSTRACT: Three Pt₄ L₂ L'₂ heteroleptic rectangles (1-3), containing ditopic redox-active bis-pyridine functionalized perylene bisimide (PBI) ligands PBI-pyr₂ (L) are reported. Co-ligand L' is a dicarboxylate spacer of varying length, leading to modified overall size of the assemblies. ¹ H NMR spectroscopy reveals a trend in the splitting and upfield chemical shift of the PBI-hydrogens in the rectangles with respect to free PBI, most pronounced with the largest strut length (3) and least with the smallest strut length (1). This is attributed to increased rotational freedom of the PBI-pyr₂ ligand over its longitudinal axis (N_py -N_py ), due to increased distance between the PBI-surfaces, which is corroborated by VT

SUBMITTER: Plessius R 

PROVIDER: S-EPMC7693204 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature