منابع مشابه
Exhibition of Nematic Mesophase in Binary Mixtures of Schiff's Bases
Generally such non-mesogenes as endowed with the structural characteristics considered essential for exhibition of mesomorphism may be expected to show mixed mesomorphism in their binary mixtures over a range of temperature and cqncentration. A large number of Schiff's bases fall in this category of non-mesogenes ; hence their binary mixtures have been investigated which help sorting out condit...
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We have prepared and studied a family of cyanobiphenyl dimers with varying linking groups with a view to exploring how molecular structure dictates the stability of the nematic and twist-bend nematic mesophases. Using molecular modelling and 1D 1H NOESY NMR spectroscopy, we determine the angle between the two aromatic core units for each dimer and find a strong dependency of the stability of bo...
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We describe polarizing lms formed from the lyotropic liquid crystalline phases of dyes dissolved in water. The dye polarizers possess a high dichroic ratio close to that of conventional polarizers. In addition, the dried dye lms provide a uniform homogeneous orientation for thermotropic nematic materials. Therefore, thin dye lms can simultaneously serve as internal polarizers and as align...
متن کاملNematic cells with defect-patterned alignment layers.
Using Monte Carlo simulations of the Lebwohl-Lasher model we study the director ordering in a nematic cell where the top and bottom surfaces are patterned with a lattice of +/-1 point topological defects of lattice spacing a . As expected on general physical grounds we find that the nematic order depends on the ratio of the height of the cell H to a . For thick cells (Ha > or = 0.9) we find tha...
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ژورنال
عنوان ژورنال: Acta Chemica Scandinavica
سال: 1970
ISSN: 0904-213X
DOI: 10.3891/acta.chem.scand.24-3759