authors |
Nolasco, MM; Vaz, PM; Vaz, PD; Ferreira, RAS; Lima, PP; Carlos, LD |
nationality |
International |
journal |
JOURNAL OF COORDINATION CHEMISTRY |
author keywords |
Tb3+ and Gd3+ complexes; -Substituted -acetylacetonate; Photoluminescence; LED; TD-DFT |
keywords |
RARE-EARTH; ENERGY-TRANSFER; QUANTUM YIELD; LUMINESCENCE; COMPLEX; PHOSPHORS; DENSITY; LIGAND; DIPHENYLETHYNE; TERBIUM(III) |
abstract |
The -substituted -diketonate [Ln(3Cl-acac)(3)(H2O)(2)] [Ln=Tb, Gd] complexes (with 3Cl-acac(-) being 3-chloro-2,4-pentanedionate) were characterized by elemental analysis, infrared, ultraviolet (UV)-visible and photoluminescence spectroscopies. For comparison purposes regarding photoluminescence, the well-known [Tb(acac)(3)(H2O)(2)] complex was also synthesized. By considering the phosphorescence spectra of [Gd(3Cl-acac)(3)(H2O)(2)], the effect of chloride replacement of hydrogen on the triplet state energy of the 3Cl-acac ligand was revealed. To support the interpretation and rationalization of the experimental results, Time-dependent DFT calculations were performed on Tb(3Cl-acac)(3)(H2O)(2). Additionally, the possibility of Tb(3Cl-acac)(3)(H2O)(2) to be used as potential green-emitting phosphor material for solid-sate light emitting diodes was evaluated. A prototype was successfully fabricated coating a near-UV LED (370nm) with the Tb(3Cl-acac)(3)(H2O)(2) complex. |
publisher |
TAYLOR & FRANCIS LTD |
issn |
0095-8972 |
year published |
2014 |
volume |
67 |
issue |
23-24 |
beginning page |
4076 |
ending page |
4089 |
digital object identifier (doi) |
10.1080/00958972.2014.969722 |
web of science category |
Chemistry, Inorganic & Nuclear |
subject category |
Chemistry |
unique article identifier |
WOS:000345454600025
|