Abstract
The synthesis of a series of banana-shaped mesogenic structures has been carried out, in which the bend unit is formed by the 3,6-substitution of carbazole by 4-alkoxyphenyl moieties. The crystal structures of the methoxy and propyloxy derivatives are reported with an analysis of the N-H...pi interactions that are observed in the crystalline state. This analysis was aided by semi-empirical molecular orbital calculations. Additionally, the thermal analysis of the complete series has been carried out in order to investigate the phase properties of these materials. The 4-nonyloxyphenyl derivative displays two melting points by DSC and normal light microscopy, but yields non-birefringent liquids. The incorporation of photorefractive molecular units, such as carbazole. into anisotropic materials may offer many advantages over conventional electrical poling of photorefractive polymers.
Original language | English |
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Pages (from-to) | 17-35 |
Number of pages | 19 |
Journal | Molecular Crystals and Liquid Crystals |
Volume | 369 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1 Oct 2001 |
Keywords
- banana
- liquid crystals
- N-H...pi hydrogen bonding
- carbazole