Synthesis, crystal structures and optical properties of open-framework gallium phosphates: NaGa3F4(PO4)2(H2O)2 and AGa2P2O7(OH)3(H2O) (A = K, Rb)

Tianyou Wang; Chao Wu; Lin Lin; Zhipeng Huang; Mark G. Humphrey; Chi Zhang

doi:10.1016/j.jssc.2020.121412

Synthesis, crystal structures and optical properties of open-framework gallium phosphates: NaGa₃F₄(PO₄)₂(H₂O)₂ and AGa₂P₂O₇(OH)₃(H₂O) (A = K, Rb)

Tianyou Wang, Chao Wu, Lin Lin, Zhipeng Huang, Mark G. Humphrey, Chi Zhang^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

Three new alkali-metal gallium phosphates NaGa₃(PO₄)₂F₄(H₂O)₂ (1), KGa₂P₂O₇(OH)₃(H₂O) (2), and RbGa₂P₂O₇(OH)₃(H₂O) (3) were obtained using hydrothermal methods. Compound 1 crystallizes in the chiral space group P4₃2₁2. The structure of 1 features a three-dimensional (3D) framework composed of 2D layers of corner-sharing GaO₄F₂ and GaO₂F₄ octahedra that are further bridged by PO₄ tetrahedra with Na⁺ cations residing in the oxyfluorinated gallolayers. Compounds 2 and 3 are isostructural, both crystallizing in the centrosymmetric space group P2₁/c; their structures consist of novel 3D gallophosphate frameworks constructed from Ga₄O₂₀ tetramers interconnected by PO₄ units with 8-membered ring channels along the b-axis, in which K⁺/Rb⁺ cations are located. The diffuse reflectance spectra show that the ultraviolet (UV) cut-off edges are about 292 nm (4.25 eV), 275 nm (4.51 eV) and 306 nm (4.05 eV) for 1–3, respectively. Luminescent studies suggest that 1–3 emit blue light under the excitation of near-ultraviolet light.

Original language	English
Article number	121412
Journal	Journal of Solid State Chemistry
Volume	288
DOIs	https://doi.org/10.1016/j.jssc.2020.121412
Publication status	Published - Aug 2020

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@article{dee5213a4e884160aa6eec1475efccf5,

title = "Synthesis, crystal structures and optical properties of open-framework gallium phosphates: NaGa3F4(PO4)2(H2O)2 and AGa2P2O7(OH)3(H2O) (A = K, Rb)",

abstract = "Three new alkali-metal gallium phosphates NaGa3(PO4)2F4(H2O)2 (1), KGa2P2O7(OH)3(H2O) (2), and RbGa2P2O7(OH)3(H2O) (3) were obtained using hydrothermal methods. Compound 1 crystallizes in the chiral space group P43212. The structure of 1 features a three-dimensional (3D) framework composed of 2D layers of corner-sharing GaO4F2 and GaO2F4 octahedra that are further bridged by PO4 tetrahedra with Na+ cations residing in the oxyfluorinated gallolayers. Compounds 2 and 3 are isostructural, both crystallizing in the centrosymmetric space group P21/c; their structures consist of novel 3D gallophosphate frameworks constructed from Ga4O20 tetramers interconnected by PO4 units with 8-membered ring channels along the b-axis, in which K+/Rb+ cations are located. The diffuse reflectance spectra show that the ultraviolet (UV) cut-off edges are about 292 nm (4.25 eV), 275 nm (4.51 eV) and 306 nm (4.05 eV) for 1–3, respectively. Luminescent studies suggest that 1–3 emit blue light under the excitation of near-ultraviolet light.",

keywords = "Crystal structures, Hydrothermal reaction, Luminescent, Open-framework, Phosphates",

author = "Tianyou Wang and Chao Wu and Lin Lin and Zhipeng Huang and Humphrey, {Mark G.} and Chi Zhang",

note = "Publisher Copyright: {\textcopyright} 2020",

year = "2020",

month = aug,

doi = "10.1016/j.jssc.2020.121412",

language = "English",

volume = "288",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

publisher = "Academic Press Inc.",

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TY - JOUR

T1 - Synthesis, crystal structures and optical properties of open-framework gallium phosphates

T2 - NaGa3F4(PO4)2(H2O)2 and AGa2P2O7(OH)3(H2O) (A = K, Rb)

AU - Wang, Tianyou

AU - Wu, Chao

AU - Lin, Lin

AU - Huang, Zhipeng

AU - Humphrey, Mark G.

AU - Zhang, Chi

PY - 2020/8

Y1 - 2020/8

N2 - Three new alkali-metal gallium phosphates NaGa3(PO4)2F4(H2O)2 (1), KGa2P2O7(OH)3(H2O) (2), and RbGa2P2O7(OH)3(H2O) (3) were obtained using hydrothermal methods. Compound 1 crystallizes in the chiral space group P43212. The structure of 1 features a three-dimensional (3D) framework composed of 2D layers of corner-sharing GaO4F2 and GaO2F4 octahedra that are further bridged by PO4 tetrahedra with Na+ cations residing in the oxyfluorinated gallolayers. Compounds 2 and 3 are isostructural, both crystallizing in the centrosymmetric space group P21/c; their structures consist of novel 3D gallophosphate frameworks constructed from Ga4O20 tetramers interconnected by PO4 units with 8-membered ring channels along the b-axis, in which K+/Rb+ cations are located. The diffuse reflectance spectra show that the ultraviolet (UV) cut-off edges are about 292 nm (4.25 eV), 275 nm (4.51 eV) and 306 nm (4.05 eV) for 1–3, respectively. Luminescent studies suggest that 1–3 emit blue light under the excitation of near-ultraviolet light.

AB - Three new alkali-metal gallium phosphates NaGa3(PO4)2F4(H2O)2 (1), KGa2P2O7(OH)3(H2O) (2), and RbGa2P2O7(OH)3(H2O) (3) were obtained using hydrothermal methods. Compound 1 crystallizes in the chiral space group P43212. The structure of 1 features a three-dimensional (3D) framework composed of 2D layers of corner-sharing GaO4F2 and GaO2F4 octahedra that are further bridged by PO4 tetrahedra with Na+ cations residing in the oxyfluorinated gallolayers. Compounds 2 and 3 are isostructural, both crystallizing in the centrosymmetric space group P21/c; their structures consist of novel 3D gallophosphate frameworks constructed from Ga4O20 tetramers interconnected by PO4 units with 8-membered ring channels along the b-axis, in which K+/Rb+ cations are located. The diffuse reflectance spectra show that the ultraviolet (UV) cut-off edges are about 292 nm (4.25 eV), 275 nm (4.51 eV) and 306 nm (4.05 eV) for 1–3, respectively. Luminescent studies suggest that 1–3 emit blue light under the excitation of near-ultraviolet light.

KW - Crystal structures

KW - Hydrothermal reaction

KW - Luminescent

KW - Open-framework

KW - Phosphates

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U2 - 10.1016/j.jssc.2020.121412

DO - 10.1016/j.jssc.2020.121412

M3 - Article

SN - 0022-4596

VL - 288

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

M1 - 121412

ER -

Synthesis, crystal structures and optical properties of open-framework gallium phosphates: NaGa₃F₄(PO₄)₂(H₂O)₂ and AGa₂P₂O₇(OH)₃(H₂O) (A = K, Rb)

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