The Dependency of Nematic and Twist-bend Mesophase Formation on Bend Angle

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Richard J. Mandle
Craig T. Archbold
Julia P. Sarju
Jessica L. Andrews
John W. Goodby
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[1] University of York,Department of Chemistry
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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 both the nematic and twist-bend mesophases upon this angle, thereby satisfying earlier theoretical models.
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