Calamitic heterocyclic pyrazoles formed by 1,5-bis(4-alkoxyphenyl)-l,3,5-pentanetriones
| Autor: | Shih-Yu Chou, 周世祐 |
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| Rok vydání: | 2008 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 96 In this thesis, we report the synthesis, characterization and mesomorphic properties of a series of new mesogenic derivatives based on pyrazole structureies. All compounds were characterized by 1H, 13C-NMR spectroscopy and elemental analysis. The phase behaviors of these mesogenic compounds were characterized and studied by differential scanning calorimeter (DSC) and polarization optical microscope. In the serie, a new type of mesogenic compounds derived from heterocyclic pyrazoles were prepared and studied. The compounds of Tpz-Cn, exhibited smectic phases, as expected for their rod-like structures, compounds of Tpz-2Cn, exhibited columnar hexagonal phases, as expected for their discotic-like structures. The metal complexes, Tpz-2Cn-Ni, formed by reacting the pyrazoles with NiCl2 are exhibited columnar hexagonal phases too. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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