An alternative description for the interaction between the Eu3+ ion and its nearest neighbours

作者：Oliveira Y A R^*; Lima H; Souza A S; Couto dos Santos M A

来源：Optical Materials, 2014, 36(3): 655-657.

DOI：10.1016/j.optmat.2013.11.005

• Europium compounds
• The simple overlap model
• Crystal field parameters
• Local symmetry
• Charge factor

The LiYF4:Eu3+ and the Eu (btfa)(3)(4,4-bipy)(EtOH) compounds are being revisited by the method of equivalent nearest neighbours (MENNs) and the simple overlap model, this time to suggest a comparison between: the europium local symmetry in complexes containing beta-diketones and the S-4 symmetry in the LiYF4:Eu3+; and the ionic bonding in lanthanide containing compounds as pure electrostatic attraction. The F-7(1) level splitting was satisfactorily predicted in both cases by very similar sets of charge factors. This similarity indicates that the lanthanide ion treats the chemical species (N, O and F) in its first neighbourhood merely as negative charges.

• 出版日期2014-1