Dual near infrared and visible highly luminescent samarium complexes based on dimethyl- N -benzoylamidophosphate

The samarium complexes with carbacylamidophosphate type ligand—dimethyl- N -bezoylamidophosphate and different ancillary ligands have been synthesized and their luminescence properties have been investigated. On irradiation with ultraviolet radiation the complexes display Sm III -centered intensive luminescence in visible (red–orange emission) and near-infrared spectral regions both in solid state and in non-aqueous solutions. The color coordinates, quantum yield and decay curves of the complexes are discussed in detail. Values of the emission decay times in the visible region lie in the range of 0.1–0.2 ms. It was shown that bands intensity distribution in the luminescence spectra for complexes under consideration depends on the composition of the complex and differs for the crystalline samples and the solutions. The quantum yield for the complexes solutions varies in the range 0.83–1.75%. The intramolecular energy transfer in the complexes is discussed. The obtained complexes can be considered as promising material for an emitting component of OLEDs or fluorescent markers.