Na 3 B 3 O 3 F 6 : Synthesis, Crystal Structure, and Ionic Conductivity

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[B 6 O 9 F 3 ] 3− layer.…”

Section: Figurementioning

confidence: 92%

K₃B₆O₉F₃: A New Fluorooxoborate with Four Different Anionic Units

Han

Shi

Wang³

et al. 2018

“…For instance, borates also allow forat rigonal planar coordination of the network buildingc ation boron. The inorganic fluorooxoborates known so far comprise trivalent bismuth [6,7] and mainly alkali metal as well as ammonium cations, [8][9][10][11][12][13][14][15][16][17][18][19][20] which were investigated with regard to their behaviour as ionicc onductors or their nonlinear opticalproperties.…”

Section: Introductionmentioning

confidence: 99%

The First Alkaline‐Earth Fluorooxoborate Ba[B₄O₆F₂]—Characterisation and Doping with Eu²⁺

Jantz

Pielnhofer

Wüllen

et al. 2017

The very first alkaline-earth fluorooxoborate Ba[B O F ] was synthesised by solid state methods starting from Ba(BF ) , β-BaB O , and B O . The crystal structure derived from single-crystal X-ray diffraction (P2 /n, a=6.6384(2) Å, b=7.6733(3) Å, c=11.3385(4) Å, β=91.281(2)°, Z=4, R =0.0269, R =0.018, wR =0.034) comprises layers of BO F tetrahedra condensed through triangular BO units according to the descriptor 2Δ2□:<Δ2□>Δ. The extraordinary thirteen-fold coordination of barium by oxygen and fluorine leads to interesting optical properties of a sample doped with divalent europium, where a 4f→4f emission was recorded around 359 nm together with a broad emission band of a 5d→4f emission peaking at 366 nm. The compound is further characterised by IR-, Raman-, and solid-state NMR-spectroscopic methods. Moreover, DFT calculations as well as TGA and DSC measurements were performed.

“…Jansen et al. developed several inorganic fluorooxoborates as solid ionic conductors, such as LiB 6 O 9 F, Li 2 B 6 O 9 F 2 , Li 2 B 3 O 4 F 3 , and Na 3 B 3 O 3 F 6 . The electronic and optical properties of three lithium fluorooxoborates were also studied both theoretically and experimentally .…”

Section: The Characteristics Of Fluorooxoboratesmentioning

confidence: 99%

“…[130,131] [111] and Na 3 B 3 O 3 F 6 . [112] The electronic and opticalp roperties of three lithium fluorooxoborates werea lso studied both theoretically and experimentally. [141,142] After this, we re-investigated the three acentric lithium fluorooxoboratesb yt he density functional theory (DFT) method and found that Li 2 B 6 O 9 F 2 is an outstanding DUV NLO crystal without debilitating layering.…”

Section: The Characteristics Of Fluorooxoboratesmentioning

confidence: 99%

Fluorooxoborates: Ushering in a New Era of Deep Ultraviolet Nonlinear Optical Materials

Han

Wang

Zhang

et al. 2018

Borates are one of the most important classes of functional materials, and several hundreds of artificial borates have been synthesized. The substitution of oxygen by fluorine leads to manifold classes of borates. Fluorooxoborates (also known as fluoroborates), in which the F atoms covalently connect with the B atoms, show additional compositional and structural diversity compared to classic borates. Recently, owing to the large polarizability anisotropy, large HOMO-LUMO gaps, and high hyperpolarizability of the oxyfluoride BO F building blocks, fluorooxoborates have received unprecedented attention in the search for new ultraviolet (UV) and deep-UV (DUV) nonlinear optical (NLO) materials. Specifically, some compounds have excellent NLO properties that are comparable or superior to KBe BO F , which is the only usable crystal that generates coherent light below 200 nm through a direct second harmonic generation (SHG) process. This Minireview illustrates recent progress on the synthesis, crystal structures, structure-properties relationships and applications of fluorooxoborates. This paper concludes by highlighting the outstanding opportunities offered by NLO fluorooxoborate crystals as an innovative avenue for DUV all solid-state coherent light generation.