Supramolecular chiral liquid crystals. The liquid crystalline behaviour of mixtures of 4,4′-bipyridyl and 4-[(S)-(-)-2-methylbutoxy]benzoic acid

Maren Grunert; R. Alan Howie; Annett Kaeding; Corrie T. Imrie

doi:10.1039/a605692j

Supramolecular chiral liquid crystals. The liquid crystalline behaviour of mixtures of 4,4′-bipyridyl and 4-[(S)-(-)-2-methylbutoxy]benzoic acid

Maren Grunert, R. Alan Howie, Annett Kaeding, Corrie T. Imrie^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

The thermal behaviour of binary mixtures of 4,4′-bipyridyl and 4-[(S)-(-)-2-methylbutoxy]benzoic acid has been investigated. The two components are not liquid crystalline. By comparison, mixtures containing between 0.1 and 0.5 mole fraction of 4,4′-bipyridyl exhibit mesogenic behaviour; specifically, chiral nematic, blue and smectic A phases are observed. The induced mesogenic behaviour is attributed to the formation of elongated hydrogen bonded complexes and this view is supported by infrared spectroscopy. The crystal structure of the complex containing 0.3 mole fraction of 4,4′-bipyridyl was determined using X-ray diffraction. This confirmed the formation of linear hydrogen bonded complexes in which two acid fragments are attached to a central 4,4′-bipyridyl core and supports the view that such complexes are responsible for the liquid crystalline behaviour of these mixtures.

Original language	English
Pages (from-to)	211-214
Number of pages	4
Journal	Journal of Materials Chemistry
Volume	7
Issue number	2
DOIs	https://doi.org/10.1039/a605692j
Publication status	Published - 1 Jan 1997

Bibliographical note

Acknowledgment. We are pleased to acknowledge support from the EPSRC, Grant Number GR/J32701, and the University of Aberdeen Research Committee for the award of a grant to purchase the PL-DSC. grant number GR/J32701, and from the University of Aberdeen for the award of a grant to purchase the Mettler-Toledo DSC 820. M.G. thanks the ERASMUS programme for travel funds.

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title = "Supramolecular chiral liquid crystals. The liquid crystalline behaviour of mixtures of 4,4′-bipyridyl and 4-[(S)-(-)-2-methylbutoxy]benzoic acid",

abstract = "The thermal behaviour of binary mixtures of 4,4′-bipyridyl and 4-[(S)-(-)-2-methylbutoxy]benzoic acid has been investigated. The two components are not liquid crystalline. By comparison, mixtures containing between 0.1 and 0.5 mole fraction of 4,4′-bipyridyl exhibit mesogenic behaviour; specifically, chiral nematic, blue and smectic A phases are observed. The induced mesogenic behaviour is attributed to the formation of elongated hydrogen bonded complexes and this view is supported by infrared spectroscopy. The crystal structure of the complex containing 0.3 mole fraction of 4,4′-bipyridyl was determined using X-ray diffraction. This confirmed the formation of linear hydrogen bonded complexes in which two acid fragments are attached to a central 4,4′-bipyridyl core and supports the view that such complexes are responsible for the liquid crystalline behaviour of these mixtures.",

author = "Maren Grunert and Howie, {R. Alan} and Annett Kaeding and Imrie, {Corrie T.}",

note = "Acknowledgment. We are pleased to acknowledge support from the EPSRC, Grant Number GR/J32701, and the University of Aberdeen Research Committee for the award of a grant to purchase the PL-DSC. grant number GR/J32701, and from the University of Aberdeen for the award of a grant to purchase the Mettler-Toledo DSC 820. M.G. thanks the ERASMUS programme for travel funds.",

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AU - Howie, R. Alan

AU - Kaeding, Annett

AU - Imrie, Corrie T.

N1 - Acknowledgment. We are pleased to acknowledge support from the EPSRC, Grant Number GR/J32701, and the University of Aberdeen Research Committee for the award of a grant to purchase the PL-DSC. grant number GR/J32701, and from the University of Aberdeen for the award of a grant to purchase the Mettler-Toledo DSC 820. M.G. thanks the ERASMUS programme for travel funds.

PY - 1997/1/1

Y1 - 1997/1/1

N2 - The thermal behaviour of binary mixtures of 4,4′-bipyridyl and 4-[(S)-(-)-2-methylbutoxy]benzoic acid has been investigated. The two components are not liquid crystalline. By comparison, mixtures containing between 0.1 and 0.5 mole fraction of 4,4′-bipyridyl exhibit mesogenic behaviour; specifically, chiral nematic, blue and smectic A phases are observed. The induced mesogenic behaviour is attributed to the formation of elongated hydrogen bonded complexes and this view is supported by infrared spectroscopy. The crystal structure of the complex containing 0.3 mole fraction of 4,4′-bipyridyl was determined using X-ray diffraction. This confirmed the formation of linear hydrogen bonded complexes in which two acid fragments are attached to a central 4,4′-bipyridyl core and supports the view that such complexes are responsible for the liquid crystalline behaviour of these mixtures.

AB - The thermal behaviour of binary mixtures of 4,4′-bipyridyl and 4-[(S)-(-)-2-methylbutoxy]benzoic acid has been investigated. The two components are not liquid crystalline. By comparison, mixtures containing between 0.1 and 0.5 mole fraction of 4,4′-bipyridyl exhibit mesogenic behaviour; specifically, chiral nematic, blue and smectic A phases are observed. The induced mesogenic behaviour is attributed to the formation of elongated hydrogen bonded complexes and this view is supported by infrared spectroscopy. The crystal structure of the complex containing 0.3 mole fraction of 4,4′-bipyridyl was determined using X-ray diffraction. This confirmed the formation of linear hydrogen bonded complexes in which two acid fragments are attached to a central 4,4′-bipyridyl core and supports the view that such complexes are responsible for the liquid crystalline behaviour of these mixtures.

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Supramolecular chiral liquid crystals. The liquid crystalline behaviour of mixtures of 4,4′-bipyridyl and 4-[(S)-(-)-2-methylbutoxy]benzoic acid

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