Organic dithienylethene derivatives have been extensively reported because of their potential applications in the field of photochromic systems and photonic devices. [1] Metal complexes containing such derivatives as ligands are less common in literature. [2] In general, new properties like energy transfer processes from a metal complex to an incorporated photochromic unit can be observed if a dithienylethene-substituted phenanthroline ligand is coordinated to a ...