authors |
Ananias, D; Mongis, CM; Carlos, LD; Rocha, J |
nationality |
International |
journal |
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY |
author keywords |
Luminescent Thermometers; Lanthanides; Silicates; Temperature Sensing; Cryogenic |
keywords |
ORGANIC FRAMEWORK; LANTHANIDE SILICATE; TEMPERATURE; PHOSPHORS; EMISSION; NANOPARTICLES; EMITTERS; SPECTRA |
abstract |
The hydrothermal synthesis under mild conditions and structural characterization of Na[LnSiO(4)]center dot xNaOH (Ln = Gd, Tb, Eu; x approximate to 0.2) are reported. These materials crystallize in the tetragonal non-centrosymmetric I4(-) space group. The crystal phase purity is ascertained by powder X-ray diffraction and scanning electron microscopy, and further confirmed by photoluminescence spectroscopy and lifetime measurements at 294 and 12 K. Na[(Gd0.82Tb0.14Eu0.04)SiO4]center dot xNaOH and Na[(Gd0.66Tb0.30Eu0.04)SiO4]center dot xNaOH perform well as visible ratiometric thermometers, based on the ratio between the Tb3+ and Eu3+ emissions, presenting good relative thermal sensitivities at cryogenic temperature (<100 K) with maxima of 1.9 %K-1 at 14 K and 6.2 %K-1 at 12 K, respectively. |
publisher |
WILEY-V C H VERLAG GMBH |
issn |
1434-1948 |
isbn |
1099-0682 |
year published |
2020 |
volume |
2020 |
issue |
19 |
beginning page |
1852 |
ending page |
1859 |
digital object identifier (doi) |
10.1002/ejic.202000057 |
web of science category |
Chemistry, Inorganic & Nuclear |
subject category |
Chemistry |
unique article identifier |
WOS:000534207200005
|