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- Title
PREPARATION AND CHARACTERIZATION OF A GADOLINIUM COMPOUND WITH HIGH THERMAL STABILITY.
- Authors
Chen, Wen-Tong
- Abstract
A new lanthanide compound [Gd(2,5-HPA)(2,5-PA)]n (1; 2,5-H2PA = 2,5-pyridinedicarboxylic acid) was obtained through hydrothermal reactions and structurally characterized by single-crystal X-ray diffraction. It possesses a three-dimensional (3-D) framework structure. Solid-state photoluminescence experiment revealed that it shows dark blue emission band, which can be assigned to the characteristic emission of the 4f electron intrashell transition of 6P7/2 → 8S7/2 (Gd3+). The energy transfer mechanism was explained by an energy level diagram of the gadolinium ion and 2,5-pyridinedicarboxylic acid ligand. It displayed remarkable CIE chromaticity coordinates of 0.1346 and 0.0678. The solid-state UV/Vis diffuse reflectance spectra unveiled that it possesses a wide optical band gap of 3.52 eV. Thermogravimetry (TG) measurements revealed that this compound is highly thermal stable up to around 500 °C.
- Subjects
GADOLINIUM compounds; THERMAL stability; RARE earth metals; ELECTRON emission; ELECTRON transitions; GADOLINIUM
- Publication
Bulletin of the Chemical Society of Ethiopia, 2020, Vol 34, Issue 3, p479
- ISSN
1011-3924
- Publication type
Article
- DOI
10.4314/bcse.v34i3.5