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The Syntheses of Functional Coordination Polymers and the Influence of Magnetic Field on Structure

Author: PanJianXin
Tutor: ChenQianWang
School: University of Science and Technology of China
Course: Inorganic Chemistry
Keywords: Functional coordination polymer Molecular magnets Magnetic field induces Hydrothermal / solvothermal reaction Crystal structure
CLC: O641.4
Type: PhD thesis
Year: 2009
Downloads: 275
Quote: 1
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Abstract


Molecular-based materials, especially with the object type of molecular-based materials, due to their structural diversity and potential applications in catalytic, optical, electrical, magnetic, has become very important in recent years, materials science research emerging fields of science. Molecule-based magnets are mostly through self-assembly Synthesis and self-assembly reaction mostly depends on the internal driving force, are difficult to control. While the magnetic field as the one external force, has proved to be able to be used as self-assembled power, is used to control the alignment and self-assembly of the reaction to obtain the ordered material, and even selective synthesis product. Therefore, we believe that the introduction of an external magnetic field is in the process of self-assembly of molecular magnets may have some impact on the the paramagnetic ion supramolecular self-assembly reaction, and even control the direction of these self-assembly reaction, enhanced molecular magnets, the magnetic exchange The role and improve the magnetic performance, etc.. In addition, complex-type molecular-based material having the characteristics of structural diversity, easily by chemical modification and tailoring them at the molecular level increase or a change in its magnetic properties, and tailoring and modifications on the level of such molecules can be obtained more the molecules of the functional material. The papers summarized as follows: 1. Successfully observed magnetic field on the crystallization behavior of the molecular magnets. The experimental results clearly show that the magnetic interaction between the magnetic field of the synthesis of molecular magnets molecular significantly enhanced spin of the inclination angle was significantly reduced, thereby causing the change in the nature of the magnetic ordering temperature, residual magnetic moment, the coercive field. These results indicate that the applied magnetic field can effectively affect the spin orientation of the ion, promoting the generation of the spin-ordered state. 2 azide ion N 3 - its bridging mode and effective magnetic transitivity is widely used in building complexes. Using the salophen organic auxiliary ligand to a multicore azide compound was synthesized. The single crystal structure analysis showed that the the trinuclear cluster contains EO azido bridged and azide the end groups coordination of two ligands way constitute a supramolecular network through hydrogen bonds and π-π interaction between the trinuclear cluster. 3.Select tetrazolium as a ligand, microporous three dimensional coordination polymer crystals synthesized by controlling the hydrothermal conditions. The structural test showed that the structure of the diamond has interspersed. Also conducted a detailed characterization, including elemental analysis, infrared and thermal analysis.

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CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Structural Chemistry > Complex chemistry ( coordination chemistry )
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