Changes in luminescent properties of vitrified films of terbium(III) β-diketonate complex upon UV laser irradiation
Abstract
Structural modifications following long-term UV irradiation with a pulsed nitrogen laser led to a decrease/increase in the luminescence intensities of vitrified films with the thickness of 8/20µm, respectively. The films were prepared from a terbium(III) β-diketonate complex. Optical spectroscopic studies revealed that these features are associated with different structures of the films. The 20µm film includes the aggregates hindering the non-radiative relaxation of the T1 states of ligands. Such a phenomenon is not observed in the 8µm film. A comparative analysis of the luminescent data indicates that the redistribution of the T1 energies of the ligands under UV modification is the predominant reason for the changes of the luminescent properties of the films.
- Publication:
-
Journal of Luminescence
- Pub Date:
- July 2016
- DOI:
- 10.1016/j.jlumin.2016.02.006
- Bibcode:
- 2016JLum..175..106L
- Keywords:
-
- Lanthanide(III) β-diketonate complexes;
- Luminescence;
- Aggregates;
- Non-radiative relaxation;
- Photostability;
- Vitrified films