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Synthesis and Characterization of the Organically Templated Borates and Phosphates

Author: JiangXiao
Tutor: LiangYunXiao
School: Ningbo University
Course: Inorganic Chemistry
Keywords: Borate Phosphate Inorganic - organic hybrid Crystal structure Second - order nonlinear optical
CLC: O621.3
Type: Master's thesis
Year: 2009
Downloads: 67
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Abstract


Inorganic - organic hybrid materials is the incorporation of organic functional molecules in the inorganic network, and certain chemical bonds of organic components and inorganic components through the material to reach the level of the molecular complex. Inorganic - organic hybrid materials is not only of great significance in molecular engineering, but also in catalysis, adsorption, separation, magnetic, photochemical energy storage, biochemistry and biopharmaceutical field has broad application prospects. In the past few decades, the rich structural chemistry and in the value of the second-order nonlinear optical materials, boron phosphate materials has been a rapidly developing field of research. Therefore, to explore the synthetic inorganic - organic hybrid boron, phosphate, has an important significance for the discovery of new functional materials. This article solvothermal or molten boric acid method, the synthesis of four novel organic amine as a template of a borate. In addition, the solution method synthesized two inorganic - organic hybrid phosphates. Using single-crystal X-ray diffraction, infrared spectroscopy, elemental analysis, the powder SHG, thermal analysis, and other means the determination of the crystal structure and characterization of these compounds. (1) ethylenediamine, the Xylylenediamine structure-directing agent synthesized the two inorganic - 14 organic hybrid borate [(C 2 H 10 N 2 )] 2 [B 14 O 20 (OH) 6 ] (1) and [(C 8 H 14 N 2 )] 2 [ B 14 O 20 (OH) 6 ] (2). Contains a molecular compound [C 2 H 10 N 2 ] 2 cations and larger discrete structure anion of poly fourteen polyborate [B 14 from O 20 (OH) 6 of] 4 - , the anion in the presence of the one B 8 O 8 ring and six B 3 O 3 ring. [B 14 O 20 (OH) 6 ] 4 - by hydrogen bonds between the formation of three-dimensional molecular net cell protonated [C 2 H 10 N 2 ] 2 cations fill in the grid. 2 molecules in compounds containing discrete the poly fourteen polyborate anion [B 14 from O 20 (OH) 6 ] - and [(C 8 H 14 N 2 )] 2 cation. (2), respectively, triethylene tetramine and 1 - methylimidazole as structure directing agent, synthesized two inorganic - organic hybrid pentaborate, [C 8 H 22 N 4 ] [B 5 O 6 (OH) 4 ] 2 (3) and [C 4 H 7 N 2 ] [B 5 O 6 (OH) 4 ] (4). They contain between [B 5 O 6 (OH) 4 ] - ion borate anions Subdivisions by hydrogen bonds to form a three-dimensional supramolecular organic amine cations fill in the grid. In compound 3, the starting material triethylene tetraamine Exotic The cyclization reaction occurs in the reaction, to generate a 1,4 - bis (2 - aminoethyl) piperazine. (3) two inorganic - organic hybrid phosphate synthesis solution method [C 6 H 9 N 3 O 2 ] [HPO . 4 ] (5) and [(C 7 the H 6 N 1 3 O 2 )] 2 [HPO 4 ] · 2H 2 O (6). Compound 5 [C 6 H 9 N 3 O 2 ] 2 cation [HPO 4 ] 2 - anion composition. Molecule formed through hydrogen bonding between the three-dimensional structure. This crystal belongs to the non-centrosymmetric space group (Pn, No. 7), with the non-linear optical properties of the nonlinear optical coefficient is about 0.67 times the potassium dihydrogen phosphate (KDP). Compound 6 contains two [(C 7 H 6 N 3 O 2 )] < / sup> cation, a [HPO4] 2 - anions and two crystal water molecules. By hydrogen bonds and π-π interactions between the molecules piled into the three-dimensional structure.

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CLC: > Mathematical sciences and chemical > Chemistry > Organic Chemistry > Organic Chemistry general issues > Synthetic organic chemistry
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