Revealing the reasons why the lattice solvent stabilises one spin form over the other in [Fe(bpp)2]2+ complexes bearing anions with different charge/size ratios.
The spin-crossover complex [Fe(bpp)2][BF4]2 was found to display a high spin-triggered MLCT luminescence in the solid state.
High or low spin states in iron(II) complexes with functionalised 2,6-bis(pyrazol-1-yl)pyridine ligands are efficaciously driven by intermolecular contacts.
A proton migration across a short strong hydrogen bond can be triggered by spin crossover of a remote Fe2+ cation, with the onset of a photoinduced activation energy barrier for proton motion at low temperatures.
A molecular material undergoes spin-switching as it exchanges MeOH, EtOH or nPrOH with acetone from the lattice. The subsequent thermal single-crystal-to-single-crystal desorption of nPrOH is followed by single crystal X-ray diffraction snapshots.