Alkali Metal As The Template Agent New Boron Gallium Salts Microporous Crystalline Materials Of The Synthesis, Structure And Nature Of The Study

Inorganic microporous materials have attracted considerable attention on the basis of their fundamental properties and practical applications, such as catalysts, ion exchange and adsorption. There are have many kinds of borates because of the complexity of the structures involved, which leads to the existing of a series of borates materials with fine-properties. Therefore, the studies of the synthesis and crystal structure of microporous crystals containing boron have gained great interests in recent years.In this thesis, two novel borogallates microporous materials constructed by B-0 clusters and Ga-O units and one new inorganic-organic hybrid fluorogallate have been synthesized successfully by the reaction between Ga₂O₃ and boric acid / alkali-metal borate salts under mild hydrothermal / solvothermal conditions. Their crystal structures have been determined by single-crystal X-ray diffraction analysis and further characterized by element analysis, FT-IR spectrum, Raman spectrum, Energy Disperse Spectrum, XRD and simultaneous DTA-TGSingle crystal X-ray diffraction analysis shows that the K₂[Ga(B₅O₁₀)]·4H₂O and Rb₂[Ga(B₅O₁₀)]·4H₂O are isostructural belonging to the C222₁ Orthorhombic space group, with the following unit cell parameters: a=10.3798(7) (?), b=9.3934(7) (?), c=13.8051(10) (?),α=90°,β=90°,γ=90°, V=1346.02(17) ^A3, Z=4 for K₂[Ga(B₅O₁₀)]·4H₂O; a=9.5126(16) (?), b=10.3814(17) (?), c=13.959(2) (?),α=90°,β=90°,γ=90°, V=1378.5(4) A³, Z=4 for Rb₂[Ga(B₅O₁₀)]·4H₂O, respectively. They have chiral space group and 3D open framework with 8-, 8-, 8-and 11-, 11-multiring intersecting-channel constructed with B-O clusters and Ga-O units along the [100], [010], [001], and [110], [1(?)0] directions, respectively. It is worth noting that 11-ring is the largest odd ring among the known zeolite topologies.The inorganic-organic hybrid fluorogallate [C₄H₁₂N₂][Co(H₂O)₆)][GaF₆]Cl is monoclinic, space group P2₁/m with unit cell dimensions a=5.7574(17) (?), b=15.028(4) (?), c=9.697(3) (?),α=90°,β=100.439(3)°,γ=90°, V=825.1(4) (?)³, Z=2. The crystal structure consists of two isolated [C₄H₁₂N2]²⁺cation, a [Co(H₂O)₆)]²⁺ cation, a [GaF₆]^3- anion and Cl^- anion. They are held together through both electrostatic interactions and the hydrogen bonds. It is worth noting that the [C₄H₁₂N₂]²⁺cation comes from the decomposition of trithylenedieamine material under hydrothermal condition.