Smectic Liquid Crystals from Supramolecular Guanidinium Alkanesulfonates

The thermotropic polymorphism of a series of guanidinium alkanesulfonates (6 ≤ n ≤ 18) was investigated by optical microscopy and differential scanning calorimetry. Hydrogen bonding was analyzed by infrared spectroscopy. Molecular volumes were measured by dilatometry. The structure of the crystal, s...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2005-06, Vol.127 (25), p.9053-9061
Main Authors: Mathevet, Fabrice, Masson, Patrick, Nicoud, Jean-François, Skoulios, Antoine
Format: Article
Language:English
Subjects:
Alkanesulfonates - chemical synthesis
Alkanesulfonates - chemistry
Calorimetry, Differential Scanning
Condensed matter: structure, mechanical and thermal properties
Crystallization
Exact sciences and technology
Experimental determinations of smectic, nematic, cholesteric, and other structures
Guanidine - chemical synthesis
Guanidine - chemistry
Liquid crystals
Physics
Spectrophotometry, Infrared
Structure of solids and liquids
crystallography
Temperature
X-Ray Diffraction
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Summary:The thermotropic polymorphism of a series of guanidinium alkanesulfonates (6 ≤ n ≤ 18) was investigated by optical microscopy and differential scanning calorimetry. Hydrogen bonding was analyzed by infrared spectroscopy. Molecular volumes were measured by dilatometry. The structure of the crystal, smectic A, and ordered smectic phases observed were studied by X-ray diffraction and utilized to prove that the supramolecular arrangement of the molecules in the crystal survives in the smectic phases at high temperature.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja051312a