Synthesis and characterization of organic-inorganic hybrid compounds with a pillared layer structure: Ga2(4,4′-bpy)(XO4)2 (X=P, As) |
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Authors: | Ching-Yeh Chen Allan J Jacobson |
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Institution: | a Department of Chemistry, National Central University, Chungli 320, Taiwan, ROCb Institute of Chemistry, Academia Sinica, Nankang, Taipei 115, Taiwan, ROCc Department of Chemistry, University of Houston, Houston, TX 77204-5003, USA |
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Abstract: | Two organic-inorganic hybrid compounds, Ga2(4,4′-bpy)(PO4)2, 1, and Ga2(4,4′-bpy)(AsO4)2, 2, have been synthesized under hydrothermal conditions and structurally characterized by single-crystal X-ray diffraction. The two compounds are isostructural and crystallize in the triclinic space group (No. 2) with a=4.9723(9) Å, b=5.770(1) Å, c=11.812(2) Å, α=78.268(3)°, β=89.159(3)° γ=88.344(3)°, V=331.7(2) Å3, Z=1, and R1=0.0377 for 1, and a=5.1111(7) Å, b=5.9327(8) Å, c=11.788(2) Å, α=79.497(2)°, β=88.870(2)°, γ=88.784(2)°, V=351.3(2) Å3, and R1=0.0264 for 2. The structure consists of neutral sheets of GaXO4 (X=P or As) which are pillared through 4,4′-bipyridine ligands. Each oxide layer, which is formed only by four-membered rings, is constructed from corner-sharing GaO4N trigonal bipyramids and XO4 tetrahedra. The title compounds are two of the few examples in which the gallium atoms are exclusively five-coordinate. |
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Keywords: | Gallium Phosphate Arsenate Bipyridine Structure |
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