Synthesis, characterization and luminescent properties of needle-like lanthanide-doped orthorhombic Y5O4F7

Microwave-Assisted Solvothermal Synthesis of Upconverting and Downshifting Rare-Earth-Doped LiYF4 Microparticles

“…Interestingly, further increase in the Li + to RE 3+ ratio to 7.5 resulted in the formation of yttrium hydroxy fluoride nanorods (Figure A3) and LiF (Figure B3). The XRD pattern of the obtained nanorods is in good agreement with those reported for numerous Y­(OH) x F y systems with varying OH to F ratios. − Their chemical composition and approximate weight fraction in the sample were determined to be Y­(OH) 0.75 F 2.25 and 73%, respectively, via Rietveld refinement. The reader is referred to Figures S4 and S5 and Table S2 in the Supporting Information for details.…”

Nanoscopic yttrium oxide fluorides: non-aqueous fluorolytic sol–gel synthesis and structural insights by19F and89Y MAS NMR

“…For comparison the reflection positions of YF 3 , r-YOF, and Y 5 O 4 F 7 are marked in ), which are very similar to each other as described in the literature. [23][24][25][26][27][28] The powder patterns of samples with lower fluorine content (z ≤ 1) show exclusive reflections of r-YOF resulting in quite narrow lines in the case of an Y/F ratio of 1 : 1 (Fig. 3c and d).…”

“…[13,14] A further possible application is its use as additive in ceramics. [23][24][25][26][27][28] Usually all compounds mentioned above were synthesized by classical solid state chemical reaction, i.e. The stable phase at room temperature is a rhombohedral phase (r-YOF) [17][18][19], the high-temperature phase β-YOF is cubic [20].…”

“…18,21,22 All known yttrium oxide fluorides offer possible applications in the field of optics, often also doped with rare earth metals. [23][24][25][26][27][28] Usually all compounds mentioned above were synthesized by classical solid state chemical reaction, i.e. by thermal annealing of precursor compounds.…”

Interacting layered hydroxide nanosheets with KF leading to Y/Eu hydroxyfluoride, oxyfluoride, and complex fluoride nanocrystals and investigation of photoluminescence

“…8,19,20 With these successes, the photoluminescent properties of the hydroxyuoride and oxyuoride products were investigated. 4,6,9,11,[21][22][23] Controlled synthesis of rare-earth compounds has also been achieved by the phase conversion technique, [24][25][26][27][28] which generally involves the two different mechanisms of interface chemical transformation 25,26 and dissolution-reprecipitation.…”