Phenanthro[9,10-d]imidazole-quinoline boron difluoride dyes with solid-state red fluorescence.

A new family of boron difluoride-rigidified dyes, phenanthro[9,10-d]imidazole-quinoline boron difluoride (PQBD), with solid-state fluorescence has been designed and synthesized. The novel series of PQBD are advantageous over the typical boron difluoride-rigidified dyes such as BODIPYs in terms of large Stokes shift and red fluorescence in the solid state.