One-Pot Synthesis of Boron Diketonate Complexes: Photophysical Properties and Sensor for Picric Acid
Synthesis of boron diketonate complexes have been developed via one-pot manner. The method focused on the selective synthesis of unsymmetric boron diketonate by involving BF3-OEt2 and β-ketothiolester intermediate generated in situ from α-aroylketene dithioacetals using p-toluenesulfonic acid as a catalyst. The unsymmetrical boron diketonate complexes are emissive both in solution and solid state with high quantum yield and large Stokes shift. The boron diketonate 6e selectively sensing the picric acid over the other nitro aromatic compounds (NACs) with detection limit of 21.5 µM.