Supramolecular Assemblies of a Bis(terpyridine) Ligand and of its [2×2] Grid-type ZnII and CoII Complexes on Highly Ordered Pyrolytic Graphite
摘要:
The synthesis and characterisation of bis(terpyridine)-derived ligands which are capable of forming [2 x 2] grid-like complexes is presented. Additional pyridine substituents on these ligands do not interfere with the complexation process. Adsorbing one of the pure ligands on highly ordered pyrolytic graphite (HOPG) shows a highly ordered structure stabilised by additional weak intermolecular C-H... N hydrogen bonds partially through the extra-pyridines as could be shown by scanning tunneling microscopy (STM) investigations. Similar adsorption experiments with one of the corresponding [2 x 2] Co-11 grid- type complexes on graphite, led also to a well-organised structure with interdigitation of the extra-pyridine moieties.