Dissertation > Excellent graduate degree dissertation topics show

Pyrazine tetracarboxylic acid rare earth coordination polymer synthesis, structure and properties of

Author: HuangXiangLei
Tutor: CaiZuo
School: Nanchang University
Course: Inorganic Chemistry
Keywords: Coordination polymers Pyrazine acid Rare earth metals
CLC: O631.3
Type: Master's thesis
Year: 2010
Downloads: 134
Quote: 1
Read: Download Dissertation


Coordination polymer is an organic ligand and the metal ion ( or metal clusters ) By way of self-assembled supramolecular coordination bond formed by a combination of polymers. The structure is novel , unique nature , such as molecular recognition, catalysis, adsorption and other fields have a good prospect . Pyrazine tetracarboxylic acid containing N, O polydentate organic ligand , ligand having a variety of ways , the structure is easy to form novel complexes; rare earth orbit to provide more air , which has a unique multi- complexes fluorescent and magnetic properties . This paper selects pyrazine tetracarboxylic acid and rare earth nitrate ( nitrate, dysprosium , europium nitrate , nitric acid terbium , gadolinium nitrate ) , respectively, by hydrothermal method and solvent evaporation method , synthetic coordination polymers and uses X- ray diffraction , X- ray powder diffraction, elemental analysis, IR spectroscopy, thermal gravimetric analysis , fluorescence analysis and other technical means to characterize the resulting products . Main work is as follows : 1. To phenazine as synthesized pyrazine tetracarboxylic acid . 2 to pyrazine tetracarboxylic acid as ligand , dysprosium nitrate , terbium nitrate , europium nitrate, the central atom , obtained by hydrothermal synthesis method of coordination polymers ( 1 ) - ( 3 ) . Complexes ( 1 ) is triclinic , P-1 space group three-dimensional structure coordination polymer . Its cell parameters : a = 9.0069 (4) A, b = 10.8801 (2) A, c = 13.246 A, α = 68.725 (8) °, p = 77.990 (8) °, γ = 88.618 (10) ° . The complexes , Dy3 nine and eight ligand ligand ligand two kinds of ways in which nine -coordinated Dy3 directly with pyrazine tetracarboxylic acid ligand , eight -coordinated Dy3 then with carboxyl, hydroxyl and water to form a metal - oxygen atom clusters , and finally through carboxyl bridge tridentate ligands way two partial structures connected together. By IR, XRD and other means to characterize the complex ( 2 ) and ( 3 ) and complexes ( 1 ) have a similar structure way . 3 with the same ligand , respectively, at room temperature and europium nitrate , terbium nitrate , gadolinium nitrate synthesis of polymers with ( 4 ) - ( 6 ) . Correlation of the structure and thermal stability, studies have shown that fluorescence properties : complex ( 4 ) and ( 6 ) has a similar structure , complex ( 5 ) with different structures . Three have good thermal stability , but the fluorescence properties are varied.

Related Dissertations

  1. Flexible,rigid,Synthesis and characterization of mixed ligand complexes,O621.1
  2. Aza- β- diimine complexes and hypophosphorous acid synthesis and structural characterization,O627.51
  3. Syntheses, Structures and Properties of Coordination Polymers with Aromatic Dicarboxylates,O631.1
  4. Syntheses, Crystal Structures, and Adsorption Properties of Novel Tetracyanometallate-based Coordination Polymers,O631.3
  5. Syntheses, Structures and Properties of Metal-organic Coordination Polymers Based on Long-Chain Aromaticmulticarboxylate,O631.3
  6. Synthesis、Structures and Characters of Coordination Polymers of Aromatic Carboxylic Acid,O631
  7. Syntheses and Characterizations of Coordination Polymers Containing Bis-imidazole Ligands,O633.5
  8. Preparation and Application of Complex Oxide Coated Nano-electrode for the Oxidation of Pollutants,X505
  9. The Synthesis, Crystal Structure and Properties of Functional Coordination Polymer Base on Nitrogen and Oxygen Multituberculate Ligand,O631.3
  10. Nitrogen-containing heterocyclic or carboxylic acid coordination polymer synthesis, structure and properties of,O635
  11. Synthesis, Structures and Properties of Cu+/Cu2+/Zn2+ Complexes Based on Diazole Ligands,O621.13
  12. Studies on the Synthesis, Characterization, and Antibacterial Activity of 2-aminoterephthalic Acid Schiff Base Coordination Polymers,O631.3
  13. Synthesis, Characterization and Application of the Novel Coordination Polymer with Pyridinecarboxylic Acid as Ligands,O633.5
  14. Synthesis and Structural Characterization of Succinic Acid Transition-Metal Coordination Polymers,O631.13
  15. Syntheses, Structures and Properties of A Series of Metal Tetrazole Coordination Ploymers by Hydro(solvo)thermal Syntheses,O626.31
  16. Benzene and azobenzene pyrimidine carboxylic acid coordination polymer synthesis and characterization,O634
  17. Synthesis, Crystal Structure and Photo-electric Property of a Series of Co-M Homometallic/Heterometallic Polynuclear Coordination Polymers,O634
  18. Synthesis, Structure and Photophysical Properties of Series Rare Earth Coordinate Polymers,O634
  19. Synthesis、 Structures and Characters of Transition Metal Coordination Polymers of Bis (Methylbenzimidazole) Flexible Ligand,O621.13
  20. Preparation of BiFeO3-based Multiferroic Materials and Study on Its Enhanced Propertities Induced by Doping,TB383.1
  21. Use of benzimidazole - (4,5, f) - and - ( 1,10 ) - phenanthroline and aromatic carboxylic acid ligands controlled supramolecular self-assembly of coordination polymers,O631.1

CLC: > Mathematical sciences and chemical > Chemistry > Polymer chemistry ( polymer ) > Polymer physics and physical chemistry of polymers > The chemical nature of polymers
© 2012 www.DissertationTopic.Net  Mobile