Synthesis and a TD-DFT study of a series of novel 3-imidazolyl-substituted coumarin molecules with large Stokes shifts

Abstract

3-Imidazo[1,2-α]pyridine coumarin 3 with four different substituents were synthesised from salicylic aldehyde derivatives, ethyl acetoacetate and 2-aminopyridine, and exhibited strong blue fluorescence in non-polar solutions and large Stokes shifts (184–210 nm) in polar solutions.