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Details for article 15 of 17 found articles
| Title: |
study of liquid crystalline N -[4-(4- n -alkoxybenzoyloxy)-2-hydroxybenzylidene]methylanilines |
| Author: |
Takase, A. Nonaka, K. Koga, T. Sakagami, S. |
| Appeared in: |
Liquid crystals |
| Paging: | Volume 29 (2002) nr. 4 pages 605-611 |
| Year: |
2002-04-01 |
| Contents: |
New homologous series of N -[4-(4- n -alkoxybenzoyloxy)-2-hydroxybenzylidene]methylanilines [ n AH m M( n =1-8/10; m =2: ortho , m =3: meta , m =4: para )] were synthesized. They exhibited a nematic phase except for 1AH3M. The temperature dependence of their Raman spectra was observed in the spectral range of 900-1700 cm -1 . In one group of n AH m M compounds, the Raman band at about 1360 cm -1 abruptly decreased in intensity and wavenumber when the crystalline solid-liquid crystal phase transition was approached. In another group, the corresponding band increased through the phase transition. The bands have been assigned to the coupling mode between the in-plane CCH deformational vibration and the ring-N stretching vibration. Such a behaviour can be explained by the molecular conformation with different twist angles of the aniline ring in relation to the Schiff 's base plane of the molecule. Some n AH m Ms exhibited photochromism. |
| Publisher: |
Taylor & Francis |
| Source file: |
Elektronische Wetenschappelijke Tijdschriften |
Details for article 15 of 17 found articles
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