Analysis of Fluorescence Spectra of Rarehyphen;Earth Chelates. II. Dipyridyl Complexes of Europic Chloride

摘要

The emission spectra of two dipyridyl complexes of EuCl3were analyzed in detail treating the ligand field as a perturbation on the freehyphen;ion levels. The ligandhyphen;field parameters were calculated from the splitting in the7F1and7F2levels of the Eu3thinsp;plus;ion without assuming a known molecular geometry and the model suggested by these parameters is discussed. In addition, the ligandhyphen;field parameters are used to calculate interatomic distances and to compare the coordinative properties of water and dipyridyl ligands. The method developed for deriving and verifying the geometrical arrangement and interatomic distances from fluorescence spectra proves to be a powerful tool.