Rayleigh scattering in hexagonal columnar liquid crystal subjected to oscillatory shear

2007 ◽  
Author(s):  
F. Sanaa^ ◽  
M. Gharbia ◽  
Mourad Telmini ◽  
Najeh Thabet Mliki ◽  
Ezeddine Sediki
Keyword(s):  
Liquid Crystal ◽  
Rayleigh Scattering ◽  
Oscillatory Shear ◽  
Hexagonal Columnar

scholarly journals Fluorescein-Bridged Perylene Bisimide Dimer for Use as Liquid Crystal: Studies on Mesomorphic and Fluorescence Properties

2021 ◽  
Author(s):  
Mingguang Zhu ◽  
Meihui Chen ◽  
Hongyu Guo ◽  
Fafu Yang
Keyword(s):  
Energy Transfer ◽  
Liquid Crystal ◽  
Fluorescence Resonance Energy Transfer ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Fluorescence Properties ◽  
Strong Fluorescence ◽  
Perylene Bisimide ◽  
Symmetric Structure ◽  
Hexagonal Columnar

Abstract A novel fluorescein-bridged perylene bisimide (PBI) dimer for liquid crystal (LC) with geometrically symmetric structure was developed. The mesomorphic results indicated that the energetically stable and unstable conformers of fluorescein fragments could lead to the transformation of mesophases from a hexagonal columnar mesophase to an uncertain phase at 136.9 °C in heating, whilst a stable hexagonal columnar mesophase maintained between 175.6 °C and 58.6 °C in cooling. The selectively excited fluorescence characters in THF solution demonstrated that the fluorescence resonance energy transfer (FRET) effect between fluorescein fragments and PBI unites could provide a means to effectively impose strong fluorescence of the dimeric PBIs modified with suitable chromophore at the N-imide position, which alternatively serves as a platform for the further study of multi-functional PBI-based LCs.

The First Asymmetrically β-Polysubstituted Porphyrin-Based Hexagonal Columnar Liquid Crystal.

ChemInform ◽  
2003 ◽  
Vol 34 (9) ◽  
Author(s):  
M. Castella ◽  
F. Lopez-Calahorra ◽  
D. Velasco ◽  
H. Finkelmann
Keyword(s):  
Liquid Crystal ◽  
Hexagonal Columnar

The first asymmetrically ??-polysubstituted porphyrin-based hexagonal columnar liquid crystal

2002 ◽  
pp. 2348-2349 ◽  
Author(s):  
M. Castella ◽  
F. L??pez-Calahorra ◽  
D. Velasco ◽  
H. Finkelmann
Keyword(s):  
Liquid Crystal ◽  
Hexagonal Columnar

Rayleigh scattering induced by static bends of layers in a smectic A liquid crystal

1973 ◽  
Vol 12 (1) ◽  
pp. 27-29 ◽  
Author(s):  
R. Ribotta ◽  
G. Durand ◽  
J.D. Litster
Keyword(s):  
Liquid Crystal ◽  
Rayleigh Scattering ◽  
Smectic A
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