Dissertation > Excellent graduate degree dissertation topics show

Synthesis, Structure and Electrocatalytic Oxidation of H2O to O2 of New Complexes Based on Keggin-Heteropolytungstates Building Units

Author: WangHaiJuan
Tutor: YouWanSheng
School: Liaoning Normal University
Course: Inorganic Chemistry
Keywords: Polyoxometalates Keggin structure Hydrothermal Synthesis Electrocatalytic oxidation
CLC: O643.32
Type: Master's thesis
Year: 2011
Downloads: 30
Quote: 0
Read: Download Dissertation

Abstract


Papers by hydrothermal synthesis method, the use of a series of 1:11 and 1:12 Keggin-type multi-metal tungsten polyoxometalate anion as a building unit, nine kinds of polyoxometalate-based complexes have not been reported so far. Using single-crystal X-ray analysis, elemental analysis, IR, XRD, TG and CV technology were used to characterize the structure and nature of the complex, a preliminary study on the nature of the complexes electrocatalytic aquatic oxygen. Of 1. Polyoxometallate anion series 1:11 tungsten construction means synthesizes the three multi polyoxometallate based complexes. [Hpy] 2 {[Co (4,4 '-Hbpy) 2 (H 2 O) 2 ] [SiCoW 11 O 39 ] (1) [Hpy] 2 {[Co (4,4 '-Hbpy) 2 (H 2 O) 2 ] [GeCoW 11 O 39 ] (2) [H 2 bpy] 3 [SiMnW 11 O 39 ] · 2H 2 O ( 3) complexes 1 and 2 are mutually isomorphic heterogeneity, by the one-dimensional Keggin anion chain [SiCoW 11 O 39 ] n6n-complex fragment [Co (4,4 '-Hbpy) 2 (H 2 O) 2 ] n4n a two-dimensional layered structure, layer and layer by 4,4 '-bpy ligand between embedded in each other to form a zipper-like three-dimensional supramolecular structure; complex 3 is replaced by Mn (II) Keggin type polymetallic tungsten polyoxometalates through the the shared terminal oxygen formed one-dimensional Z Font chain. Moreover, we also complexes 1-CPE in 0.5 M HAc-NaAc (pH 4.5) buffer, 1 mM [Ru (bpy) 3] 2 the electrochemical properties of the solution to do a detailed study . The results showed that the complex pair of electrocatalytic aquatic oxygen catalysis. Keggin type polyoxometalate anion [the SiW 12 O 40 - for the construction unit, the synthesis of both 2D lattice complexes. [{Mn (2,2 '-bipy) 2 } 2 {SiW 12 O 40 }] (4) [{Co (2 , 2'-bipy) 2 } 2 {SiW 12 O 40 }] (5) complexes 4 and 5 are isomorphic to each other different plastid Keggin type polyoxometalate anion [of SiW 12 O 40 ] 4 - fragment complexes [M (2,2 '-bipy) 2 ] 2 (M = Mn / Co) bridging the diamond lattice structure. Keggin type polyoxometalate anion [SiW 12 O 40 ] 4 - for the construction unit with soft metals Cu, Ag complexes ligated synthesized four kinds of complexes. {Cu (4,4 '-bipy) 3/2 · H 2 O} 2 {SiW 12 O 40 } · 4H 2 O (6) [{Ag4 (4,4 '-bipy) 3 (2,2'-bipy) 2 } {SiW 12 O 40 }] (7) [{Ag (py) 2 } 4 {SiW 12 O 40 }] (8) [{Ag (4,4 '-bipy)} 2 (Hpy) 2 {SiW 12 O 40 }] (9 ) complexes 6 and 7 is composed of the a Keggin type polyoxometallate anion [the SiW 12 O 40 ] 4 - and Cu (Ag)-bipy complexes fragment constitutes a dimensional Z-shaped chain structure; complexes 8 and 9 are respectively by the fragment of the complex [{the Ag (PY) 2 } 4] and [{Ag (4,4 '-bipy)} 2 (Hpy) 2 ] 4 two-dimensional layered structure of Keggin type polyoxometalate anion.

Related Dissertations

  1. Hydrothermal Synthesis of Oxide Hollow Spheres,TB383.4
  2. Flexible,rigid,Synthesis and characterization of mixed ligand complexes,O621.1
  3. Syntheses, Structures and Properties of Coordination Polymers with Aromatic Dicarboxylates,O631.1
  4. Syntheses, Structures and Properties of Metal-organic Coordination Polymers Based on Long-Chain Aromaticmulticarboxylate,O631.3
  5. Carbon fiber matrix lead dioxide electrode preparation and application of,X703
  6. Electrocatalytic oxidation dye wastewater treatment,X703
  7. Ti / TiO 2 -NTs/PbO 2 Electrode Preparation and Electrochemical degradation of DNT wastewater,X703
  8. Study on the Hydrothermal Synthesis of Spinel-type Lithium Ion-sieve and Ni-Cr Doping,P579
  9. Study on the Preparation of Potassium Ion Sieve Membrane of High SiO2/Al2O3 and Its Application Performance,P746.2
  10. Fly ash zeolite synthesis and treatment of coking wastewater,X703
  11. Study on Remediation of Benzene Componds Contaminated Soil,X53
  12. Preparation and Application of Complex Oxide Coated Nano-electrode for the Oxidation of Pollutants,X505
  13. Selective Oxidation of Propane to Acrylic Acid over Mo-V-Sb-O Catalysts,TQ225.131
  14. Studies on the Hydrothermal Synthesis and Self-Assembly Principle of Dicarboxylic Acid Coordination Polymers,O631.1
  15. Synthesis and Application of Mesoporous Alumina,O614.31
  16. Synthesis and Morphology Characterization of Indium Oxide （In2O3） Crystals,O614.372
  17. Synthesis and Properties Research of Polyoxometalate Single Crystal Based on Phosphotungstate Anions,TB321
  18. Preparation and Properties of Cerium-based Compounds （CePO4, CeO2） Luminescent Materials,TB383.1
  19. Synthesis and Fluorescence Properties of Y2O3 :Eu3+,TB34
  20. Synthesis, Characterization and Application of the Novel Coordination Polymer with Pyridinecarboxylic Acid as Ligands,O633.5
  21. Preparation and Characterization Open Framework Zeotype Germanates,TQ424.25

CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Chemical kinetics,catalysis > Catalytic > Catalytic reaction
© 2012 www.DissertationTopic.Net  Mobile