Smectic liquid crystals from supramolecular guanidinium alkanesulfonates.
The thermotropic polymorphism of a series of guanidinium alkanesulfonates (6 < or = n < or = 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.
Mathevet
Fabrice
F
Institut de Physique et Chimie des Matériaux de Strasbourg, Groupe des Matériaux Organiques (CNRS UMR 7504), Université Louis Pasteur, 23 rue du Loess, 67034 Strasbourg Cedex 2, France.
Masson
Patrick
P
Nicoud
Jean-François
JF
Skoulios
Antoine
A
D000476:Alkanesulfonates / Q000138:chemical synthesis / Q000737:chemistry*; D002152:Calorimetry, Differential Scanning; D003460:Crystallization; D019791:Guanidine / Q000138:chemical synthesis / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013696:Temperature; D014961:X-Ray Diffraction
D000476:Alkanesulfonates; D019791:Guanidine