Synthesis, structures and near-infrared luminescent properties of two novel temperature-dependant Er(III) coordination polymers based on 2,2′-bipyridine-3,3′,6,6′-tetracarboxylic acid

Efficient Ytterbium Near-Infrared Luminophore Based on a Nondeuterated Ligand

A novel molecular ytterbium complex is reported with a new tetradentate ligand based on the 2,2'-bipyridine-6,6'-dicarboxylic acid scaffold. The photophysical properties are investigated, especially with respect to near-infrared luminescence. The ytterbium complex shows a rather high absolute luminescence quantum yield of Φ = 3.0% and a luminescence lifetime of τ_obs = 72 μs at room temperature in CD₃OD solution.

Solvent triggered structural diversity of triple-stranded helicates: single molecular magnets

Solvents have been found to be the key for the construction of diverse triple-stranded helicates. Distinct solvent molecules are found to coordinate to the Dy³⁺ centers to replace the original hydrate molecules.