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The Synthesis, Structure and Properties of Molybdenum Oxygen Cluster Derivatives.

Author: SunYueXia
Tutor: SunZuo
School: Liaoning Normal University
Course: Inorganic Chemistry
Keywords: Multi - molybdenum polyoxometalates Supramolecular structure Hydrothermal Synthesis Crystal structure
CLC: O611.4
Type: Master's thesis
Year: 2011
Downloads: 28
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Abstract


This thesis Keggin-type, Dawson-molybdenum polyoxometallate anion basic building units, In a covalent bond or intermolecular interactions by appropriate choice of the organic nitrogen-containing cyclic ligand anions, the use of hydrothermal synthesis synthesis by regulating the different raw materials and pH the nine new supramolecular compounds and organic - inorganic hybrid compound, IR, TG, elemental analysis, and single-crystal X-ray-ray diffraction, and SEM characterization crystals. And the synthesis conditions, the law, and the catalytic activity of the preliminary inquiry. 1, was successfully synthesized by hydrothermal the two Dawson structure more to build units sulfur molybdenum salt compound: [C 5 N 2 H 14 ] 2 [S 2 Mo 18 Ⅵ O 62 ] · 8H < sub> 2 O (1) [C 5 N 2 H 14 ] 8 (H 3 O) 2 [S 2 Mo 2 Ⅴ Mo 16 Ⅵ O 62 ] 3 · (C 5 H 5 The N) 2 (2) The two compounds are inclusive of N-methyl-piperazine cation, wherein the compound (1) between each of the more than two anion consists of an N-methyl-piperazine through NH ... O connections to form a one-dimensional chain. Compound (2), the most significant is the protonated water (H 3 O) and N-methyl piperazine cations are connected through hydrogen bonds with anions to form three-dimensional supramolecular structure. 2, through the introduction of the 4,4 '-dipyridyl synthesized four kinds Keggin anions is to build a unit of the organic - inorganic hybrid molybdate compound: Compound (3) in the multi-anion [SiMo 12 O < sub> 40 ] 4 - and [{Cu the (2'2 bipy)} 6 Mo the O 6 22 ] 4 links into a one-dimensional chain structure through bridging oxygen through key hydrogen bonds between the pyridine ring π-π stacking interactions between the chain and the chain to form a three-dimensional supramolecular structure. Water molecules drifted between the supramolecular framework. Keggin type anion in the compound (4) for [SiMo 12 from O 40 ] 4 - with infinite cation of [Cu (4'4-bipy )] n through the terminal oxygen atoms connected to form a layered structure of 2D. The structure of the compound (5) is the anion [SiMo 12 O 40 ] 4 - with the protonated between 4'4-bipyridyl supramolecular structure through the formation of hydrogen bonds. 1,1 - dimethyl-4,4 '-bipyridyl cation in the structure of compound (6) as a cation of the charge-balancing drifted around anions, and by electrostatic forces, and hydrogen bonding interactions [SiMo 12 O 40 ] 4 - connected together to form a three-dimensional supramolecular structure. 3, were synthesized by a hydrothermal method molybdate of the two to vanadium, molybdenum, as the cap of the Keggin structure: the structure of the compound (7), 4'4-bipy protonated as the charge-balancing cations separated from anions around anions by electrostatic attraction and hydrogen bonding interactions [SiMo14O44] 4 - connected together to form a three-dimensional supramolecular structure. The structure of the compound (8) is established on the basis of the typical Keggin structure [HSiMo for Ⅵ 10Mo V 2O40 (VO) 2 ] - heteropoly anion and (C 11 H 11 N 2 CuOH) coordination cation and accumulation of organic ligands consisting of three-dimensional supramolecular framework. 4, synthesized by hydrothermal method [γ-Mo 8 O 26 ] 4 - anions molybdate building blocks: Cu 4 (C 3 N 2 H 4 ) 10 Mo 8 O 26 (H 2 O) 4 (9) is typical [γ-Mo < N / sub> O 26 ] 4 - structure and [Cu (of C 3 2 the H 4 ) 2 ] through the terminal oxygen atoms linked by π-π bond between the hydrogen bond and the imidazole ring stacking interactions to form a three-dimensional supramolecular structure. Water molecules drifted between the supramolecular framework.

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CLC: > Mathematical sciences and chemical > Chemistry > Inorganic Chemistry > Chemical elements and inorganic compounds > Inorganic synthetic chemistry
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