Switching of conductance between conformers can be explained by the rotation of one methyl group.

A chelating coumarin-derived ligand sensitizes all emitting lanthanide ions in the solid state and gives high absolute quantum yields for ethanol solutions of complexes of Sm, Eu, Tb, and Dy, above 20% for the last two. Crystal structures of these four complexes are [Ln(Cum)(HO)(X)]·X where X = MeOH or EtOH.

Here we present room-temperature spin-dependent charge transport measurements in single-molecule junctions made of metalloporphyrin-based supramolecular assemblies. They displayl arge conductance switching for magnetoresistance in as ingle-molecule junction. The magnetoresistance depends acutely on the probed electron pathway through the supramolecular wire:those involving the metal center showed marked magnetoresistance effects as opposed to those exclusively involving the porphyrin ring which present nearly complete absence of spin-dependent charge transport. The molecular junction magnetoresistance is highly anisotropic, being observable when the magnetization of the ferromagnetic junction electrode is oriented along the main molecular junction axis,a nd almost suppressed when it is perpendicular. The key ingredients for the abovee ffect to manifest are the electronic structure of the paramagnetic metalloporphyrin, and the spinterface created at the molecule-electrode contact.

The synthesis and characterization of a family of [60]fullerocurcuminoids obtained via Bingel reactions is reported.