Synthesis And Characterization Of Borates And Aluminates

Borates and aluminates can show different properties by their complicate structures. Hencethe research on the synthesis and characterization of borates and aluminates is the focus of theacademia all the time. However, compared to traditional borates/aluminates basically inorganic-based case, by adding organic components to guide the synthesis of borates/aluminates or forincorporation into the product in the synthesis of inorganic-organic hybrid borates/aluminates isrelatively small. Therefore, exploration and synthesis of new borates/aluminates by organiccompounds has great significance for our discovery of new molecular functional materials.In this paper, five novel crystals have been synthesized under mild solvothermal conditions,including an inorganic borate which synthesized by the organic solvent of glacial acetic acid, twoinorganic-organic hybrid borates and two inorganic-organic hybrid aluminates. The crystalstructures have been determined from single-crystal X-ray diffraction data and furthercharacterized by X–ray powder diffraction, FT-IR spectrum, and simultaneous DTA-TG.（1） One novel borate [B₁₀O₁₄（OH）₄（H₃0）₂]·H₂O（1） have been synthesized under mildsolvothermal conditions by the organic solvent of glacial acetic acid. Compound （1） is a ten boronborate with space group P-1（No.2）, which is made up of boron-oxygen anion of B₁₀O₁₄（OH）₄^2-,two hydration hydrogen ions and one water molecule. The molecules are connected by hydrogenbonding to form three-dimension structure.（2） Two novel inorganic-organic hybrid borates,{B₆O₇（OH）₃[O（CH₂）₂NH₂]₃}Ni（2） and[Cu（C₂H₈N₂）₂（H₃BO₃）₂]·1/2[[C₂H₈N₂)₂（H₂O）₂]·1/2[Cu（C₂H₈N₂）₂]·[B₄O₅（OH）₄]₂（3） have beensynthesized under mild solvothermal condition and solution method respectively. Compound （2） isprepared by the template of monoethanolamine with space group Pa-3（No.205）. It’s composed bythe inorganic-organic hybrid anions of {B₆O₇（OH）₃[O（CH₂）₂NH₂]₃}2-and Ni²⁺. The{B₆O₇（OH）₃[O（CH₂）₂NH₂]₃-is formed by condensation reaction between monoethanolaminemolecules and boron-oxygen groups. The units are interlinked via hydrogen bonding to form a3Dsupramolecular network. Compound （3） is composed of borate anions of [B₄O₅（OH）₄]₂-andcoordination cations of [Cu（C₂H₈N₂）₂]2+，[Cu（C₂H₈N₂）₂（H₃BO₃）₂]²⁺and [[C₂H₈N₂)₂（H₂O）₂]²⁺with space group P-1（No.2）. Its3D supramolecular structure is stacked by hydrogen bondingsystem. （3） Two novel inorganic-organic hybrid aluminates,[Co（C₂H₈N₂）₃][Al（OH）₅H₂O]（4） and[Ni（C₂H₈N₂）₃][Al（OH）₅H₂O]（5） have been synthesized by the template of anhydrousethylenediamine under mild solvothermal conditions. Compound （4） is zero-dimensional structurewith space group P-31c（No.163）, three ethylenediamine molecules connects with one cobalt ion toform cation of [Co（C₂H₈N₂）₃]²⁺, each Al atom coordinates with five hydroxyl and one H₂Omolecule to form anion. The3D supramolecular network is accumulated through hydrogenbonding system. The framework of compound （5） is similar with compound （4）. However, thealuminum source used in the experiment of compound （5） is different from compound （4）.