The UV-phosphor strontium fluorooxoborate Sr[B₅O₇F₃]:Eu

Abstract

The fluorooxoborates Sr[B5O7F3] (Ccm21 (no. 36), Z = 4, a = 864.777(3) pm, b = 1001.037(4) pm, c = 810.110(5) pm, 630 refl., 68 param., RF = 0.061, RBragg = 0.051) and Sr[B5O7F3]:Eu2+ were synthesized via solid-state reactions from Sr(BF4)2 and B2O3. Doping was achieved by adding EuF3, which was reduced to its divalent state during the synthesis. Sr[B5O7F3] was investigated by infrared spectroscopy. Photoluminescence spectra of the doped compound revealed an Eu2+ 5d-4f emission in the UV regime peaking at 371 nm with a full width at half maximum (FWHM) of 21 nm upon excitation at 239 nm, which proves a weak coordination of europium by the anionic fluorooxoborate network.

Sr6(BO3)3BN2: An Oxido–Nitrido–Borate Phosphor Featuring BN2 Dumbbells

“…Therefore, we are interested in materials based on tetrahedral networksalso named silicate-analogous materialslike borosulfates or fluorooxoborates. − During our research on such boron-containing materials we find occasionally pure sulfates or borates. Borates comprise either tetrahedral BO 4 or, more frequently, triangular BO 3 basic building units, both lacking inversion centers and, very rarely, even BO 2 – ions …”

Hydroxyfluorooxoborate Na[B3O3F2(OH)2]⋅[B(OH)3]: Optimizing the Optical Anisotropy with Heteroanionic Units for Deep Ultraviolet Birefringent Crystals

“…Particularly,t he band at 1240 cm À1 is consistent with the asymmetric stretching of the B À Fb onds while the double absorption peaks at 830 and 771 cm À1 are attributed to the symmetric out of phase stretching of the BÀF bonds according to the recent reported fluorooxoborates and in some previous literatures. [10,17,18] 3. The Nuclear Magnetic Resonance (NMR) Spectroscopy Thes olid-state NMR is au biquitous tool to identify the local environments of boron moieties units at the atomic level.…”

Microwave‐Assisted Hydrothermal Synthesis, Crystal Structure, and Thermal Decomposition of Strontium Citrate Monohydrate Sr3(C6H5O7)2·H2O

“…In the course of our systematic investigations on silicate‐analogous materials [ 1–4 ] we are also interested in suitable precursor compounds. [ 5,6 ] Cheap and readily available precursors are often attractive if the morphology of the precursor is passed on to the final product.…”

“…phosphors for white LED applications. [ 2,3 ] Sr 3 (C 6 H 5 O 7 ) 2 · H 2 O could be a promising precursor for the synthesis of such phosphors.…”