Dissertation > Excellent graduate degree dissertation topics show

Oxime-bridged Complexes: Synthesis, Crystal and Magnetic Properties

Author: ZuoCongMin
Tutor: KouHuiZhong
School: Tsinghua University
Course: Chemistry
Keywords: oxime nickel coordination complex crystal structure magnetic property
CLC: O621.13
Type: Master's thesis
Year: 2009
Downloads: 11
Quote: 0
Read: Download Dissertation

Abstract


Molecular magnetism, the interdisciplinary field covering physics, chemistry, biology and material science, has been one of the most active advanced areas of study. Meanwhile, oximes as lignads have many advantages in coordination chemistry, and have been widely used in molecular magnetism field. This thesis investigated the syntheses, structure andmagnetism of series of clusters and low-dimensional complexes constructed from oximate. Most efforts were focused on the magneto-structural correlations of the clusters and low-dimensional complexes from pyaoxH2 (pyaox H2 = pyridine-2-amidoxime ) and pzoxH2 (pzoxH2= Pyrazine-2-amidoxime). The main results are as following.1. Series of“multi-decker”polynuclear Ni complexes were obtained from pyaoxH2 and nickel complexes, and the detailed study of magneto-structural correlations and the growth mechanism have been made. It is a rare family of single-, double- and triple-decker Ni(II) complexes, where each deck is composed of a tetranuclear cationic unit [Ni4(pyaoxH)2(pyaox)2]2+. The synthetic strategy is based on the fact that single-decker [Ni4]2+ fragments are present in the solution confirmed by ESI-MS (388.13 m/e for [Ni4(Hpyaox)2(pyaox)2]2+. Ferromagnetic coupling through the N-O bridges has been observed, resulting in a high spin ground state of S = 2, 4 and 6, respectively.2. In order to obtain high-dimensional complexes, we replace pzoxH2 for pyaox H2, which has one more coordination point than pyaox H2, and a two-dimensional oxime-bridged complexe was obtained successfully. The two-dimensional oxime-bridged complexes is a grid complex which is assembled from a tetranuclear cationic unit [Ni4(pzoxH)2(pzox)2]2+ in a mutually perpendicular way.

Related Dissertations

  1. Urothermal Synthesis, Structure and Characterization of Functional Coordination Polymers,O631.3
  2. Nickel Accumulation and Toxicity to Earthworm Eisenia Fetida in a Range of Chinese Soils,X131.3
  3. Syntheses, Structures and Properties of Metal-organic Frameworks Based on Dicarboxylate Ligands,O621.13
  4. Synthesis and Structures of Metal (Mn, Zn and Sn) Complexes Incorporating with the Sily-linded Bis (Amidinate) Ligands,O621.2
  5. Synthesis and Characterization of Aromatic Amidinate Supramolecular and Phosphorus Imido Compounds,O621.2
  6. Influence of Various PH and the Treating Time on Mechanical Property and Surface Structure of Ni-ti Orthodontic Wire,R783.5
  7. Research on Fuel Gas Production from Catalytic Gasification of Municipal Solid Wastes,X799.3
  8. More than enough calcium and magnesium metal ligand complexes Synthesis, Structural Characterization and Antibacterial Activity,O641.4
  9. Rubber - cobalt - nickel- Preparation of adhesion promoters,TQ430.1
  10. Arsenic and antimony chalcogenides Solvothermal Synthesis and Characterization,O641.4
  11. MCM-41 as aryl oxime palladium catalyst and catalytic Suzuki coupling reaction of aryl,O643.36
  12. Aza- β- diimine complexes and hypophosphorous acid synthesis and structural characterization,O627.51
  13. Pyridine-containing gene four tetrathiafulvalene Synthesis and Structural Characterization,O621.3
  14. IVA metal chalcogenides Solvothermal Synthesis and Structure,O611.4
  15. Oxime ether structure containing anthraquinone conjugate synthesis glycosyl,TQ463
  16. Special morphology precursor synthesis route inorganic oxide,TB383.1
  17. Structural and Functional Studies of Saccharomyces Cerevisiae Aldo-keto Reductase Gre2,Q936
  18. Syntheses, Structures and Properties of Transition Metal Complexes Based on Pyridyl Ligands,O627.2
  19. Syntheses, Structures and Properties of Metal-organic Coordination Polymers Based on Long-Chain Aromaticmulticarboxylate,O631.3
  20. Assembly, Structures and Properties of Metal-Organic Frameworks Based on Flexible Aromatic Carboxylic Acid,O621.13
  21. Solvothermal Synthesis of Indium Chalcogenides Integrated with 2,2’–Bipyridine,O627

CLC: > Mathematical sciences and chemical > Chemistry > Organic Chemistry > Organic Chemistry general issues > Theory of organic chemistry,physical organic chemistry > Organic Chemistry Structure Theory
© 2012 www.DissertationTopic.Net  Mobile