Rapid construction of bicyclic triazoline skeletons with dual-state emissionviacycloaddition reaction of 4-phenyl-1,2,4-triazoline-3,5-dione with vinyl azides

Fluorescent bicyclic triazolines with excellent photophysical properties were easily and conveniently synthesized and showed intense deep-blue photoluminescence with quantum yields of up to 78% and 87% in solution and the solid state, respectively.