Ttlie:Ba2Ga2F6(IO3)(PO4): First fluoride-containing iodate-phosphate with 1D [Ga2F6(IO3)(PO4)]4- helix chain
Abstract:Herein, the first F-containing iodate-phosphate, namely Ba2Ga2F6(IO3)(PO4), was prepared via hydrothermal reaction, in which the HPF6 (70 wt.% solution in water) was first used as the sources of both fluoride and phosphate anions. Ba2Ga2F6(IO3)(PO4) features an unprecedented 1D [Ga2F6(IO3)(PO4)]4- helix chain, composed of 1D Ga(1)(IO3)O4F chain via the bridging of 0D Ga(2)(PO4)F5. UV-Vis spectrum exhibits that Ba2Ga2F6(IO3)(PO4) has a wide bandgap with short-UV absorption edge (4.35 eV; 253 nm). Birefringence measurement under the polarizing microscope shows that Ba2Ga2F6(IO3)(PO4) display a moderate birefringence of 0.072 @ 550 nm, which is consistent with the value (0.070 @ 550 nm) obtained by DFT calculations, indicating that Ba2Ga2F6(IO3)(PO4) has potential applications as a short-UV birefringent material. This study highlights the crucial role played by the incorporation of specific functional groups into compounds, shedding light on their contribution to the promising inorganic functional materials.
