Affordable Access

Publisher Website

Synthesis, sparkle model, intensity parameters and spectroscopic studies of the new Eu(fod)3phen-NO complex

Journal of Solid State Chemistry
Publication Date
DOI: 10.1016/s0022-4596(02)00206-2
  • Luminescence
  • Intensity Parameters
  • Sparkle Model
  • Chemistry


Abstract We report the synthesis, characterization, spectroscopic properties, structure prediction and intensity parameters of the Eu(fod) 3phen-NO (fod=6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octadionate and phen-NO=1,10-phenanthroline N-oxide). Both the elementary analysis and the IR vibrational data are consistent with the formula of the cited complex. The absorption spectrum in ethanol shows a maximum at 272 nm, which is shifted from 293 nm in relation to Eu(fod) 3. This is an indication of the coordination of phen-NO. The emission spectra at room temperature and at 77 K show a very high intensity for the hypersensitive 5 D 0→ 7 F 2 transition, pointing to a highly polarizable chemical environment around the Eu 3+ ion. The complex has a decay time, τ, lower than the Eu(fod) 32H 2O. It can be attributed to a considerable resonance of the ligand triplet with the excited levels of the lanthanide ion. The sparkle and INDO/S-CI models were used to calculate the structure and electronic spectrum of this complex. Good agreement between theoretical and experimental UV absorption spectra has been obtained. Structural data were used to perform theoretical predictions of the Judd–Ofelt intensity parameters ( Ω λ,λ=2,4 ), the 5 D 0→ 7 F 0/ 5 D 0→ 7 F 2 intensity ratio and 5 D 0→ 7 F 1 transition splitting using the simple overlap model. The satisfactory results obtained are an indication that the models used can lead to reliable prediction of the structure and 4 f–4 f intensities.

There are no comments yet on this publication. Be the first to share your thoughts.


Seen <100 times

More articles like this

Synthesis, sparkle model and spectroscopic studies...

on Journal of Alloys and Compound... Jan 01, 2004

Sparkle model and intensity parameters of the Eu(3...

on Journal of Molecular Structure... Jan 01, 2001

Characterization and spectroscopic studies of Eu3+...

on Journal of Alloys and Compound... Jan 01, 2004
More articles like this..