The Infrared, Raman, and Vibronic Spectra of Europium Chelates

Abstract

Absorption spectra in the far and intermediate infrared, as well as Raman and vibronic spectra were measured for three crystalline forms of four-ligand europium chelate with dibenzoylmethane and piperidine and a three-ligand chelate in the spectral ranges: 40-450, 450-4500, 0-4500 and 0-1600 cm - 1 , respectively.The analysis of the individual spectra enabled the identification of the frequencies corresponding to the vibrations of the Eu -O bond coupled with the lattice vibrations, and the frequencies of the intraligand vibrations. It is found that piperidine is bound to the complex molecule by hydrogen bond.