The chiroptical luminescence spectra of Eu3+in trigonal Na3[Eu(oxydiacetate)3] . 2NaClO4. 6H2O

Publisher Website
Google Scholar
Abstract
Polarized axial and orthoaxial luminescence spectra in the 7 Fj (J=1, 2, 3 and 4)←5 D 0 transition regions of Eu3+ in single crystals of trigonal Na3[Eu-(oxydiacetate)3]. 2NaClO4.6H2O are reported and analysed. Differential circular polarization (left-handed versus right-handed) is measured in the axial luminescence spectra of this chiral system, and differential linear polarization (σ versus π) is measured in the orthoaxial luminescence spectra. Energy level calculations as well as transition dipole strength and rotatory strength calculations are reported, and the results of these calculations are compared with experimental observation. Good agreement is achieved between the calculated and observed crystal-field splittings within 7 Fj multiplets, and satisfactory agreement is achieved for the calculated versus observed (relative) emission intensities and polarizations (σ verus π) within the 7 Fj ←5 D 0 transition regions. The chiroptical properties of the 7 F 1←5 D 0 transition are quantitatively accounted for by theoretical calculation, and qualitative agreement between theory and experimental observation is achieved for the chiroptical properties of the 7 F 3 and 7 F 4←5 D 0 transitions. Theoretical calculations fail to account for the intensity distributions and chiroptical properties observed for the E a←A 1 and Eb ←A 1 crystal field components of the 7 F 2←5 D 0 transition, and this failure is attributed to the neglect of ligand polarizability anisotropies in the electric dipole intensity model used in the calculations.

This publication has 25 references indexed in Scilit: