Does Topology Dictate the Incidence of the Twist-Bend Phase? Insights Gained from Novel Unsymmetrical Bimesogens

Richard J. Mandle*, John W. Goodby

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We prepared a significant number of unsymmetrical liquid-crystalline dimers that exhibit the twist-bend nematic phase; a state of matter that exhibits spontaneous breaking of mirror symmetry and, for some materials, a microsecond electrooptic response. A number of novel unsymmetrical bimesogens were synthesized and in comparing their thermal behaviour to previous literature examples, we have uncovered an unexpected relationship between the thermal stability of the nematic and NTB phases. This relationship demonstrates that molecular shape dictates the incidence of this fascinating phase of matter and leads us to speculate as to the existence of “twist-bend nematic phases” on length scales beyond those of the molecule.

Original languageEnglish
Pages (from-to)18456-18464
Number of pages9
JournalChemistry : A European Journal
Issue number51
Early online date12 Dec 2016
Publication statusPublished - 19 Dec 2016

Bibliographical note

© 2016 The Authors


  • chirality
  • liquid crystals
  • molecular shape
  • soft matter
  • symmetry

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