Dissertation > Mathematical sciences and chemical > Chemistry > Polymer chemistry ( polymer ) > Polymer physics and physical chemistry of polymers > The chemical nature of polymers

Syntheses, Crystal Structures and Properties of Coordination Polymers Constructed from 2-hydroxyquinoline-4-carboxylic Acid and 1H-1,2,3-triazole-4,5-dicarboxylic Acid.

Author YuanGang
Tutor SuZhongMin
School Northeast Normal University
Course Physical and chemical
Keywords Nitrogen heterocyclic carboxylic acid ligand A transition metal Rare earth metals Crystal structure Coordination polymers
CLC O631.3
Type Master's thesis
Year 2009
Downloads 195
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The coordination polymer not only has rich topology, and has broad application prospects in the field of catalysis, molecular conductors, light-emitting materials, molecular magnets, nonlinear optical. Studies have shown that the nature of the ligand of an organic ligand and a metal ion has a decisive influence on the structure and function of the coordination polymer, other factors such as the anion, the templating agent, a solvent, the reactants and the molar ratio of the pH value of the reaction system is synergistic regulation. Therefore, the purpose of control synthesis of the expected structure and properties of coordination polymers has been the pursuit of the goal of the chemist. In recent years, the use of N-containing heterocyclic carboxylic acid ligands to build a large number of metal - organic complexing polymer having a novel topology. In this thesis, hydrothermal and solvent 2 - hydroxyquinoline -4 - carboxylic acid (H 2 HQC) and 1,2,3 - triazole -4,5 - dicarboxylic acid ( H 3 tda) as the primary ligand, supplemented the auxiliary ligand with Zn of 2 , Cd 2 and other transition metal ions and lanthanide metals the ion build 17 compounds were characterized, and their crystal structure and properties of, and then explore the ligands, metal ions on the structure of the compound. 2 - hydroxyquinoline -4 - carboxylic acid ligands, respectively, under hydrothermal conditions and solvent synthesis conditions and transitional metal Zn 2 the Ni 2 ion is synthesized by the reaction of two novel compounds, A They MF [Zn 5 (HQC) 4 (μ3-OH) 2 ] n (1) and [Ni (HQC) 2 (the H 2 O) 2 ] (2) . The coordination geometry of the metal ions and reaction conditions on the structure of the product. Finally, the fluorescence properties of the compound. 2. 1,2,3 - triazol-4 ,5 - dicarboxylic acid as a ligand, 2,2 '- bipyridine (2,2'-bipy) and other nitrogen-containing neutral organic molecules as the second ligand under hydrothermal conditions and Zn 2 , the Cd 2 , the Co 2 , the Pb 2 , etc. The transition metal ions to build eight new complexes. Complexes {[Cd 3 (TDA) 2 (pyim) 3 ] · 3H 2 O} n (7) for the one-dimensional columnar structure, {[the Zn 3 (TDA) 2 (bipy) 2 (H 2 O) 2 ] · 4H of 2 O} n (3) and {[Cd (tda) 2 (bipy) 3 ] · 5H 2 O} n (4) two-dimensional layered structure, five other compounds [the Zn 2 (TDA) (tz) (H 2 O) 2 ] · H 2 O (5), [Zn 2 (tda) (tz) (H 2 O) 2 ] · H 2 O (6), [Cd 7 (tda) 4 (pz) (Ac) (H 2 < / sub> O) 7 ] · 3H 2 O (8), [Co 5 (tda) 4 (H 2 O) 8 ] n (9), and [Pb (TDA)] n (10) are three-dimensional structure. Also explore the coordination geometry of the metal ion and ligand coordination mode, while the second ligand effects on the structure are discussed and investigated the fluorescence properties of the complexes. 3 similarly to 1,2,3 - triazole-4 ,5 - dicarboxylic acid as a ligand, and a rare earth metal ion reaction to give 7 isomorphic chiral organometallic complexes [Ln (TDA) (H 2 O)] · 2H 2 O (Ln = La (11), Ce (12), Pr (13), Nd (14), Eu (15), Sm (16), Gd (17)). On the the chiral structural characteristics of the complexes are discussed, and their fluorescence properties and magnetic properties were studied.

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