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Synthesis and Structure of Coordination Polymers Constructed from Coordination Compound Containing Phenanthroline as Precursor

Author: GaoBing
Tutor: ShiZuo
School: Liaoning Normal University
Course: Inorganic Chemistry
Keywords: Coordination polymers Phenanthroline Reaction precursors Carboxylic acid Potassium ferricyanide
CLC: O631.13
Type: Master's thesis
Year: 2010
Downloads: 106
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Abstract


Coordination polymer is formed by metal ions and organic ligands through coordination bond with a zero-dimensional, one-dimensional, two-dimensional or infinite three-dimensional network structure. The coordination polymers Set the rigidity of inorganic compounds and organic compounds functionality in one, has a good potential applications in the field of magnetism, nonlinear optics, catalysis and chiral recognition and split. Therefore, the design and synthesis of functional coordination polymers more and more people's attention. By the design of the ligand compound as the precursor of the reaction to achieve the coordination polymer design, in order to obtain the novel structure of the ligand of the functional polymer. To phenanthroline as the organic ligand design and synthesis of coordination compounds of Cu (phen) 2 Cl 2 as a precursor in the reaction, the reaction precursor synthesis reproduce is good, high yield, purity, and can be formed in aqueous solution [Cu (phen) 2 ] 2 cation, you can continue with the formation of anionic ligands the formation of new coordination polymers. New ligand of the resultant polymer can be wholly or partly to maintain the precursor in the reaction structure is conducive to the formation of novel topology. Reaction precursor synthesis: phenanthroline as the synthesized Cu (phen) 2 Cl 2 (1) and [Cu (phen) 2 Cl (OH)] · H 2 O (2) coordination compounds. The compound (1) is formed by two chelating ligand phenanthroline with chloride ions and two end zero-dimensional structure. Compound (2) is formed by two chelating ligand phenanthroline ligands and one terminal chloride ion [Cu (phen) 2 Cl] cation, the free hydroxyl ions in the structure play the role of the charge balancing. (2) Cu (phen) 2 Cl 2 reaction precursor synthesis of coordination polymers: (1) precursor compound in the reaction of Cu (phen) 2 Cl 2 (1) in the synthesis system [Cu (phen) 2 ] 2 or [Cu (phen) 2 Cl] cation, organic carboxylic acid ligands (pyromellitic dianhydride and terephthalic acid) as an anionic ligand synthesis of coordination polymers, [Cu (phen) 2 Cl] · [C 10 H 5 O 8 < / sub>] - (3), [Cu (phen) 2 Cl] · 0.5 [C 10 H 4 O 8 ] 2 - (4), Cu (phen) Cl (BDC) 0.5 (5 ) and Cu (phen) (BDC) (6) four coordination polymers. Compound (3) is formed by the [Cu (phen) 2 the Cl] cation and did not participate in the coordination of pyromellitic dianhydride ligand hydrolysis pyromellitic acid formed after the removal of a carboxyl proton the H 3 the BETC - anion formation of zero-dimensional structure, which H3betc - anion in the structure only play The role of the charge balancing. The compound (4) is [Cu (phen) 2 Cl] the cation and 0.5 did not participate in the coordination pyromellitic dianhydride ligand hydrolysis formed pyromellitic tetracarboxylic acid off a carboxyl proton H 2 BETC of 2 - anion formation of zero-dimensional structure, H 2 betc 2 - anion balance the charge in the structure only play the same role. The compound (5) is a the binuclear copper structural unit formed from terephthalic acid ligand bridging between the two [Cu (phen) 2 Cl] . Neighboring binuclear copper structural unit using the phenanthroline ligand between the pi → pi accumulation of zero-dimensional structure to expand into a one-dimensional chain structure. Compound (6) is terephthalic acid bridge connected to the [Cu (phen) 2 ] 2 is formed between the zigzag one-dimensional chain structure. (2) reaction of the precursor compound Cu (phen) of 2 Cl 2 (1) may be available in the synthesis system [Cu (phen) 2 ] 2 cation, [Fe (CN)] 6 3 - as an anionic ligand synthesis of coordination polymers with Polymer {[Cu (phen) 2 ] 3 [Fe (CN) 6 ]} 2 · 2 [Fe (CN) 6 ] (7). Compound (7) there are two identical structure {[Cu (phen) 2 ] 3 [Fe (CN) 6 ] } 3 structural units, each structural unit by an iron cyanide anion three cyano group in its structure with three [Cu (phen) 2 ] 2 in Copper Coordination zero-dimensional structure. The two free iron cyanide anion play a balanced role of the charge.

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CLC: > Mathematical sciences and chemical > Chemistry > Polymer chemistry ( polymer ) > Polymer physics and physical chemistry of polymers > Theory of polymer structure > In Polymer
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