Emission wavelength variation with changes in excitation in a Re( i )–bisthiazole ligand complex that breaks the Kasha–Vavilov rule

We report highly unusual photophysical properties of a fac-Re(CO)3–bisthiazole complex, which is shown to break the Kasha–Vavilov rule. Herein, we show that such a complex has unusual emission wavelength variation due to the presence of photo-induced isomerisation from the stable, ground-state N,N-bound thiazole complex to S,N- and S,S-donation in the photo-induced excited state. A triple excitation, triple emission profile along with extensive …