Luminescence Spectroscopy and Crystal Field Simulations of Europium Propylenediphosphonate EuH[O3P(CH2)3PO3] and Europium Glutarate [Eu(H2O)]2[O2C(CH2)3CO2]3·4H2O

The results of investigations on the photoluminescence of two europium hybrid compounds, EuH[O3P(CH2)3PO3] (Eu[diph]) and [Eu(H2O)]2[O2C(CH2)3CO2]3·4H2O (Eu[glut]), are presented. In both compounds one local environment is found for the rare earth (Re) ion and the symmetry of the Re polyhedron is low (Cs) as evidenced by the Eu3+ luminescence studies. The electrostatic crystal field (cf) parameters of the 7F multiplet are obtained by the application of the phenomenological cf theory. The simulations using C2v symmetry for the rare earth ion give good agreement between the calculated and the experimental 7F0–4 energy level schemes. The observed optical data are discussed in relation to the crystal structure of the compounds.