Syntheses, structures and fluorescence of lanthanide complexes of 4-acyl pyrazolone derivatives

Abstract

Three lanthanide complexes of 4-acyl pyrazolone derivatives: Ln(PMPP–SHZ) 2(CH 3OH) 2 (Ln = Sm ( 1), Eu ( 2), Gd ( 3); PMPP–SHZ = N-(1-phenyl-3-methyl-4-propionyl-5-pyrazolone)-salicylidene hydrazide) have been synthesized and structurally characterized by X-ray crystallography. And all of them were carefully investigated by elemental analysis, thermal analysis and spectral characterization. The fluorescence of these three complexes 1– 3 in solid state was investigated at room temperature. All complexes emit a blue emission band, and there are three characteristic emission peaks of Sm 3+ evidently and one characteristic emission peak of Eu 3+.