Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 120, Issue 16, Pages 8992-8999Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.6b01834
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Funding
- Deutsche Forschungsgemeinschaft (DFG) [GRK 1582]
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Nanocrystalline Sr1-xYxF2+x samples (0 <= x <= 0.50) were prepared by fluorolytic sol-gel and mechanochemical syntheses using anhydrous HF or NH4F as fluorinating agents. This way, we compare the generated nanoparticular nonstoichiometric phases synthesized by two different routes. The obtained nonstoichiometric fluorite-type phases were studied using F-19 magic-angle spinning (MAS) and F-19-Y-89 CP MAS NMR techniques and applying the superposition model. The F-19 spectra of these phases can be fully explained by the distribution of Sr2+ and Y3+ cations around fluoride ions. These samples can serve as model compounds for a better structural understanding of fluorescent up- and down-converting systems.
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