Spectral characteristic and crystal-field calculations for new Er(III) phosphor of the type [Er(SP)4]− (where SP=C6H5S(O)2NP(O)(OCH3)2−)

The studies of lanthanide β-diketones and their derivatives have been greatly intensified because of their potential use in photonic devices. In this work the results of spectroscopic properties of a new erbium phosphor are presented. Optical characteristics of the title chelate was based on absorption and emission spectroscopy. The crystal-field calculation using phenomenological model was performed basing on Stark components from absorption and emission low temperature spectra. The CF and CCF parameters for Nd(III) (D. Kulesza, M. Sobczyk, J. Legendziewicz, O.M. Moroz, V.M. Amirkhanov, Struct. Chem., 21 (2010) 425) have been applied as starting points in the fitting procedures for [Er(SP)4]−. Na[Er(SP)4] and Na[Nd(SP)4] are isostructural and crystallize in the monoclinic system (space group P21/c). The crystal lattice consists of two independent polymeric chains with the same kind of coordination of Er and Na ions.