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Twist, tilt, and orientational order at the nematic to twist-bend nematic phase transition of 1 '',9 ''-bis(4-cyanobiphenyl-4 '-yl) nonane: A dielectric, H-2 NMR, and calorimetric study

Autor
Robles-Hernández, B.; Sebastian, N.; Rosario, M.; Lopez, D.; Diez, S.; Salud, J.; Ros, M.; Dunmur, D.; Luckhurst , G.; Timimi, B.
Tipus d'activitat
Article en revista
Revista
Physical review E: statistical, nonlinear, and soft matter physics
Data de publicació
2015-12-02
Volum
92
Número
6
Pàgina inicial
062505-1
Pàgina final
062505-16
DOI
https://doi.org/10.1103/PhysRevE.92.062505 Obrir en finestra nova
Projecte finançador
MATERIALES FUNCIONALES AUTOORGANIZADOS: CARACTERIZACION TERMICA Y DIELECTRICA DE LOS
Repositori
http://hdl.handle.net/2117/85097 Obrir en finestra nova
Resum
The nature of the nematic-nematic phase transition in the liquid crystal dimer 1 '',9 ''-bis(4-cyanobiphenyl-4'-yl) nonane (CB9CB) has been investigated using techniques of calorimetry, dynamic dielectric response measurements, and H-2 NMR spectroscopy. The experimental results for CB9CB show that, like the shorter homologue CB7CB, the studied material exhibits a normal nematic phase, which on cooling undergoes a transition to the twist-bend nematic phase (N-TB), a uniaxial nematic phase, promot...
Citació
Robles-Hernández, B., Sebastian, N., Rosario, M., Lopez, D., Diez, S., Salud, J., Ros, M., Dunmur, D., Luckhurst , G., Timimi, B. Twist, tilt, and orientational order at the nematic to twist-bend nematic phase transition of 1 '',9 ''-bis(4-cyanobiphenyl-4 '-yl) nonane: A dielectric, H-2 NMR, and calorimetric study. "Physical review E: statistical, nonlinear, and soft matter physics", 02 Desembre 2015, vol. 92, núm. 6, p. 062505-1-062505-16.
Paraules clau
Behavior, Dependence, Elasticity, Liquid-crystal dimers, Molecular-geometry, Relaxation, Spectroscopy

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