Cover Picture: Acid‐Responsive Absorption and Emission of 5‐ N ‐Arylaminothiazoles: Emission of White Light from a Single Fluorescent Dye and a Lewis Acid (ChemistryOpen 5/2016)

The Front Cover picture shows structures of the key compounds and the change in the fluorescence. Although electron‐donating and ‐accepting groups of monocyclic 5‐ N , N ‐diarylaminothiazoles are not in the same plane but highly deviated, they show relatively strong fluorescence from blue to orange. In particular, the addition of Brønsted and Lewis acids to 5‐ N , N ‐diaryl‐2‐(4‐pyridyl)thiazoles shifts the absorption and emission to longer wavelengths. The thiazoles and acids form 1:1 complexes. Fine tuning of the amount of added B(C 6 F 5 ) 3 enables us to provide a white‐light emission with a single fluorescent molecule. More information can be found in the Communication by T. Murai and co‐workers on page 434 in Issue 5, 2016 (DOI: 10.1002/open.201600059).