Dissertation > Excellent graduate degree dissertation topics show

Synthesis, Crystal Structures and Properties of Coordination Polymers Based on "V-shaped" and Triangle Carboxylate Ligands

Author: WangYuanYuan
Tutor: ZhouJianLiang
School: Central South University
Course: Chemistry
Keywords: coordination polymer crystal structure topology antiferromagnetic
CLC: O641.4
Type: Master's thesis
Year: 2013
Downloads: 10
Quote: 0
Read: Download Dissertation

Abstract


Metal-organic frameworks (MOFs) have novel structures and the extensive applications in the optical, electrical, magnetic, catalysis, molecular recognition, adsorption, hydrogen storage materials. These applications make MOFs to attract the attention of many chemists. Two kinds of the flexible organic ligands which are4,4’-(phenylazanediyl)dibenzoic acid (H2L) and4,4’-(4-(pyridine-4-yl) phenylazanediyl)dibenzoic acid (H2PBA) are designed and synthesized in the thesis. H2L as a "V" shaped linker and H2PBA as a tripod ligand provide the possibility for the construction of the pore structure of coordination polymers.We successfully synthesized seven coordination polymers based on "V-shapes" flexible4,4’-(phenylazanediyl)dibenzoic acid and nitrogenous organic ligands as auxiliary ligands under hydrothermal(solvothermal) conditions.{[CdL(4,4’-bipy)·DMF}n (1),{Cd2(L)2(bpe)2}n (2){[CoL(4,4’-bipy)]·DMF}n (3) have the same coordination mode and the crystal structure. They have2D layer structures and Form ABAB accumulation.{[CoL(bpyb)0.5]·(H2O)2}n (4) includes [Co2(CO2)4]clusters and is not interspersed3D structure. With the topological viewpoint, the framework of4adopts the cds topology, a4-connected{65·8} net. Magnetic testing indicates antiferromagnetic coupling between Co ions.{[Cu4(μ3-OH)2(L)2]·DMF}n (5) has a unique crystal structure. These {Cu4}-based SBUs are connected to1D [Cu4(μ3-OH)4(CO2)4]n chains by two bridged carboxylate groups of two L ligands and two μ3-OH. The1D [Cu4(μ3-OH)4(CO2)4]n chains further are linked by L ligands into a3D framework. There are many larger pores size of12.050×9.302A in the crystal structure of compound5. Topology analys shows Schlafli symbol {44·611}. Magnetic testing indicates antiferromagnetic coupling between Cu ions. The{[Ni2O(L)2(bpp)2]·2DMA}n (6) has [Ni2O(CO)4] clusters and2D structures form3D structure by interlocking. The topological analysis of the6crystal structure displays schlafli symbol{33·410·5·6}. Complex{[NiL(bpe)1.5]·H2O}n (7) form1D+2D=3D structure with the role of the two ligands. The topology analysis of compound7reveals the Schlafli symbol{610}.[Co(PBA)2]·DMF}n (8) is syntheticed on the tripod ligand4,4’-(4-(pyridine-4-yl)phenylazanediyl)dibenzoic acid under hydrothermal (solvothermal) conditions. The every PBA ligand connect three [Co2(CO2)4] clusters to form a double interspersed3D net structure. The topological analysis of8crystal structure gives Schlafli symbols {4·62}2{42·610·83}. Between the Co ions interaction deplays antiferromagnetic coupling.

Related Dissertations

  1. The Influence of Magnetic Field Topology on Electron Motion in Hall Thrusters,V439.2
  2. Task Partition of Network Simulation under Large-Scale Computing,TP393.01
  3. Urothermal Synthesis, Structure and Characterization of Functional Coordination Polymers,O631.3
  4. Flexible,rigid,Synthesis and characterization of mixed ligand complexes,O621.1
  5. Syntheses, Structures and Properties of Metal-organic Frameworks Based on Dicarboxylate Ligands,O621.13
  6. Synthesis and Structures of Metal (Mn, Zn and Sn) Complexes Incorporating with the Sily-linded Bis (Amidinate) Ligands,O621.2
  7. Synthesis and Characterization of Aromatic Amidinate Supramolecular and Phosphorus Imido Compounds,O621.2
  8. First-Principles Studies of Cathode Material LiMO2 （M=Co, Ni, Mn） of Lithium Ion Batteries,TM912
  9. More than enough calcium and magnesium metal ligand complexes Synthesis, Structural Characterization and Antibacterial Activity,O641.4
  10. Multi-attribute undirected weighted graph clustering method,O157.5
  11. Arsenic and antimony chalcogenides Solvothermal Synthesis and Characterization,O641.4
  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. Graph-based similarity search scientific literature key technology research,TP391.3
  16. Study on the Synthesis, Characterization and Application of Diethyldithiocarbamate Antimony Vulcanizing Accelerator,TQ330.38
  17. Structural and Functional Studies of Saccharomyces Cerevisiae Aldo-keto Reductase Gre2,Q936
  18. A Study of Multi-Path Routing Algorithm of Wireless Sensor Networks Based on Energy Balance,TP212.9
  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 > Physical Chemistry ( theoretical chemistry ),chemical physics > Structural Chemistry > Complex chemistry ( coordination chemistry )
© 2012 www.DissertationTopic.Net  Mobile