Discotic liquid crystals(DLCs) in this research absorb the light in visible region of spectrum, this characteristic is not found in rod-like liquid crystals. A majority of discotic liquid crystals form columnar mesophases probably due to intense £k-£k interactions of polyaromatic cores. £k-£k interactions are caused by intermolecular overlapping of p-orbitals in £k-conjugated systems, so they become stronger as the number of £k-electrons increases.
Three new hexagonal columnar disctic liquid crystals 9-{11-[2,3,6,7-tetrakis(hexyloxy)dibenzo[a,c]phenazinylcarboxyalkyl]} have been successfully synthesized by covalently attaching carbazole moiety to a tetrakis (hexyloxy)dibenzo[a,c]phenazinyl core with an ester group containing different lengths of alkyl spacer having 3,6,and 11 carbon atoms.
In order to set up a basic data base, we measure and analyze the discotic liquid crystals via various instruments.In addition, we also utilize both simulation systems of MMM and QMM to predict several molecular dynamics and properties such as: vibration, rotation, motion and heat of formation and so on.So we can see more depth inside how the concentration effects on the geometry structure arrangement of the discotic liquid crystals.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0727107-122405 |
| Date | 27 July 2007 |
| Creators | Chuang, Yao-wei |
| Contributors | Hsin-Lung Chen, Wen-Yao Huang, Mei-Ying Chang, Yu-Kai Han |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0727107-122405 |
| Rights | not_available, Copyright information available at source archive |
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