The influence of the imine bond direction on the phase behaviour of symmetric and non-symmetric liquid crystal dimers

Cruickshank, Ewan; Walker, Rebecca; Strachan, Grant J.; Goode, Charlotte H.F.; Majewska, Magdalena M.; Pociecha, Damian; Gorecka, Ewa; Storey, John M.D.; Imrie, Corrie T.

doi:10.1016/j.molliq.2023.123226

Journal of Molecular Liquids

2023

DOI: 10.1016/j.molliq.2023.123226

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The influence of the imine bond direction on the phase behaviour of symmetric and non-symmetric liquid crystal dimers

Ewan Cruickshank,

Rebecca Walker,

Grant J. Strachan

et al.

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2024

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Cited by 12 publications

References 43 publications

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Isothermal Phase Transitions in Liquid Crystals Driven by Dynamic Covalent Chemistry

Martínez,

Schlossarek,

Würthner

et al. 2024

Angewandte Chemie

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The dynamic nature of calamitic liquid crystals is exploited to perform isothermal phase transitions driven by dynamic covalent chemistry. For this purpose, nematic (N) arrays based on aldehyde 1 were treated with different amines (A‐E) in an on‐surface process, which resulted in different isothermal phase transitions. These phase transformations were caused by in‐situ imination reactions and are dependent on the nature of the added amine. Transitions from the N to crystal (1A, 1E), isotropic (1B), and smectic (Sm) (1C, 1D) phases were achieved, while the resulting materials feature thermotropic liquid crystal behavior. A sequential transformation from the N 1 to the Sm 1C and then to the N 1B was achieved by coupling an imination to a transimination processes and adjusting the temperature. All of these processes were well characterized by microscopic, spectroscopic, and X‐ray techniques, unlocking not only the constitutional but also the structural aspects of the phase transitions. This work provides new insights into designing constitutionally and structurally adaptable liquid crystal systems, paving the way toward the conception of programable evolutive pathways and adaptive materials.

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Isothermal Phase Transitions in Liquid Crystals Driven by Dynamic Covalent Chemistry

Martínez,

Schlossarek,

Würthner

et al. 2024

Angewandte Chemie

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show abstract

Isothermal Phase Transitions in Liquid Crystals Driven by Dynamic Covalent Chemistry

Martínez,

Schlossarek,

Würthner

et al. 2024

Angew Chem Int Ed

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Exploring odd-even sensitivity in m.OnO.m liquid crystal compounds: A comprehensive study using DFT analysis

Chakraborty,

Bhattacharjee,

Bhattacharjee

2024

Journal of Molecular Liquids

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The influence of the imine bond direction on the phase behaviour of symmetric and non-symmetric liquid crystal dimers

Cited by 12 publications

References 43 publications

Isothermal Phase Transitions in Liquid Crystals Driven by Dynamic Covalent Chemistry

Isothermal Phase Transitions in Liquid Crystals Driven by Dynamic Covalent Chemistry

Isothermal Phase Transitions in Liquid Crystals Driven by Dynamic Covalent Chemistry

Exploring odd-even sensitivity in m.OnO.m liquid crystal compounds: A comprehensive study using DFT analysis

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