Luminescent properties of europium carboxylates

• Mixed-ligand europium carboxylates with nitrogen- and phosphorus-containing neutral ligands were synthesize.
• The compounds were studied by the luminescent and X-ray photoelectron spectroscopy methods.
• The value of electro-dipole 5D0–7F4 transition rise with decrease of the electron density transfer from Eu to ligand.

Mixed-ligand europium carboxylates with nitrogen- and phosphorus-containing neutral ligands having polymer or island structure were studied by the luminescent and X-ray photoelectron spectroscopy methods. In similar groups of the compounds, the value of Stark splitting of the 7F1 – level decreased with decrease of the electron density transfer from europium ion to ligand (covalence of metal-ligand bond increases) and the relative intensity of electro-dipole 5D0 – 7F4 transition rised.

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