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

Abstract The results of investigations on the photoluminescence of two europium hybrid compounds, EuH[O 3 P(CH 2 ) 3 PO 3 ] (Eu[diph]) and [Eu(H 2 O)] 2 [O 2 C(CH 2 ) 3 CO 2 ] 3 ·4H 2 O (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 ( C s ) as evidenced by the Eu 3+ luminescence studies. The electrostatic crystal field (cf) parameters of the 7 F multiplet are obtained by the application of the phenomenological cf theory. The simulations using C 2 v symmetry for the rare earth ion give good agreement between the calculated and the experimental 7 F 0–4 energy level schemes. The observed optical data are discussed in relation to the crystal structure of the compounds.