Dissertation > Excellent graduate degree dissertation topics show

Synthesis, Structures, and Properties of Metal-Organic Framework Materials Based on Bifunctional Ligands with Nitrogen and Carboxylic Acid

Author: ZhouXiaoJing
Tutor: ShiZhan
School: Jilin University
Course: Inorganic Chemistry
Keywords: metal-organic framework topologies multifunctional materials crystal structure magnetism photoluminenscence
CLC: O621.2
Type: PhD thesis
Year: 2012
Downloads: 309
Quote: 0
Read: Download Dissertation


Metal-organic frameworks(MOFs) as a branch of porous materials, have attactedmuch attentions because of unique flexible tailoring, various topologies andpromising applications in the area of gas sorption, separation, photoluminescence,catalysts and magnetism.The synthesis condition of MOFs is very mild, and themethod is simple; By selecting suitable biulding blocks and organic ligands to realizethe control of pore shape and dimension. And at the same time, Metal OrganicFrameworks can be endowed with multiple functionalities by choosing functionalmetal ions and organic ligands with functional groups. At present, thousands of MOFshave been reported, nevertheless, targeted synthesis of MOF materials with designedstructures and properties is still a formidable challenge.Based on the principle of crystal engineering, to start from the properties of MOFs,we focus our study on the synthesis, structures and multifunctional properties ofMOFs with various topologies. The purpose of the synthesis is to explore the effectsof structure feathers and properties on the resulting MOFs, such asmetal ions, thedimension and configuration of ligands, solvents, metal-to-ligand ratios and etc. Inthis disertation, we have chosen different organic ligands and constructed11MOFs.The corresponding structure and properties have been studied. These results will beintroduced from the following aspects:1. Four metal-organic frameworks,[Cd3K(L16(H2O)3](OH)(DMF)4(1)[Cd(L22](DMF)(H2O)0.25(2),[Cd(L12](DMF)0.5(3),[Zn(L12](DMF)0.5(4)have beensynthesized by using two ligands with different length, configuration, and thecorresponding structures and propeties have been studied. Compound1showsnanosize channel which is constructed by interlocked six-fold one-dimensional helicalchains with the asymmetrical ligand. The hexagonal tubes extend infinitly from adjacent K atoms to construct a3D framework with acs topology. Compound2showsa diamondoid topology with4-fold interpenetration, and displays left andright-handed helical chains in the structure. Compound3is a3D framework with bcutopology. Compound4is a (4,4) layer structure, and further extend to3Dsupermolecular structure with hydrogen bonds. In the end, we discussed the influenceof the chosen ligands to the resulting structures.2. Four metal-organic frameworks,[Cd(L32](H2O)(DMF)0.5(5),[Mn(L32](H2O)1.5(DMF)0.5(6), Zn(L4)2(H2O)(7), Cd(L4)2(H2O)2(8), have beenconstructed by using two ligands with different configurations, and we focus on thestudy of the structures and properties of compound5,6. Compound5is a3D neutralframework possesses a permanent porosity, and displays the selectivity of CO2,compound6shows dominant antiferromagnetic couplings in the structure. And thephotoluminescence of the four compounds have also been studied.3. A two-dimentinal metal-organic framework [Co2(L5)Cl(DMF)2](DMF)3(9) basedon the nanometresized ligand has been synthesized and displays the topology of hbc,the magnetic characterization shows that there is ferromagnetic exchange interactionsin the structure; HDMF2[Cd5(L6)4(H2O)](H2O)2(CH3CH2OH)(10) is a (3,3,12)-c netframework with solvent fluorescence sensing effect.4. Two MOFs Cd(L7)2(H2O)(11), Cd(L8)(H2O)(12) have been sythesized with theligands4’-(4-carboxyphenyl)-2,2’:6’,2’’-terpyridine(HL7),2,2’-bipy-5,5’-carboxylicacid(H2L8). Compound11is a two-fold2D metal-organic framework, and furtherextend to3D supermolecular structures through π-π interaction. Compound12is a3Dmetal-organic framework with1D channels. The photoluminescence has also beencarried out.In summary, we have synthesized several Metal-Organic Frameworks throughsolvothermal method. And studied their properties in the area of gas sorption,photoluminescence, megnetism and etc. We believe that these results would facilitatethe exploration of new MOFs with charming topologies and multifunctionalproperties for directing the synthesis of novel architectures.

Related Dissertations

  1. Urothermal Synthesis, Structure and Characterization of Functional Coordination Polymers,O631.3
  2. The Preparation and Research of Magnetically Separable TiO2 Photocatalyst Nanofibers,TB383.1
  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. More than enough calcium and magnesium metal ligand complexes Synthesis, Structural Characterization and Antibacterial Activity,O641.4
  7. Arsenic and antimony chalcogenides Solvothermal Synthesis and Characterization,O641.4
  8. Aza- β- diimine complexes and hypophosphorous acid synthesis and structural characterization,O627.51
  9. Pyridine-containing gene four tetrathiafulvalene Synthesis and Structural Characterization,O621.3
  10. IVA metal chalcogenides Solvothermal Synthesis and Structure,O611.4
  11. Preparation and Physical Properties of (BEDT-TTF)(FeBr4 ) Crystal,O73
  12. The Solvothermal Syntheses and Characterizations of Transition Metal-contained Chalcogenidoarsenates,O611.4
  13. Study on the Synthesis, Characterization and Application of Diethyldithiocarbamate Antimony Vulcanizing Accelerator,TQ330.38
  14. Vanadate Nanoribbons: Synthesis, Characterization and Properties in Optics, Electricity and Magnetism,TB383.1
  15. The Synthesis, Structure and Characterization of Dawson-like Type Polyoxometalate,O611.3
  16. Coordination Polymers Based on Biphenyl-2,5,2’,5’-tetracarboxylic Acid: Preparation, Crystal Structures and Properties,O634
  17. Structural and Functional Studies of Saccharomyces Cerevisiae Aldo-keto Reductase Gre2,Q936
  18. Syntheses, Structures and Properties of Metal-organic Coordination Polymers Based on Long-Chain Aromaticmulticarboxylate,O631.3
  19. Assembly, Structures and Properties of Metal-Organic Frameworks Based on Flexible Aromatic Carboxylic Acid,O621.13
  20. Solvothermal Synthesis of Indium Chalcogenides Integrated with 2,2’–Bipyridine,O627
  21. Synthesis, Conformation and Character of W/Cu/S Supermolecule Clusters Containing Tp~* Group,O611.4

CLC: > Mathematical sciences and chemical > Chemistry > Organic Chemistry > Organic Chemistry general issues > Properties of organic compounds
© 2012 www.DissertationTopic.Net  Mobile