Synthesis and Fluorescence Properties of Thiazole-Boron Complexes Bearing a β-Ketoiminate Ligand

Novel fluorescent dyes, thiazole boron complexes bearing beta-ketoiminate ligands, have been synthesized, and their fluorescence properties were investigated. The BF2 complexes showed a pronounced aggregation-induced emission enhancement effect because of the restriction of C-Ph intramolecular rotation. The BPh2 complexes showed higher fluorescence quantum yields than the corresponding BF2 complexes, both in solution and in the solid state.