title: Organization of four thermotropic liquid crystals of different polarities on model liquid and solid surfaces.
abstract: The thermodynamic and surface properties of four structurally related thermotropic liquid crystals (LC) were investigated to understand their organization at gas-liquid and gas-solid interfaces. In this study, LC with a benzoyloxy azobenzene mesogenic core substituted with heptyloxy and/or dioxyethylene ether groups were used. The propensity of the LC to form self-assembled multilayers was demonstrated in the films spread at the air/aqueous interface using the Langmuir technique and Brewster angle microscopy and on the solid surfaces of Chromosorb WHP and silica, using differential scanning calorimetry. On the basis of the results obtained, a molecular recognition mechanism underlying separation processes using LC as selectors in gas chromatography is proposed.
authors.affiliation: Equipe de Physico-chimie des Colloïdes, UMR 7565 CNRS/Université Henri Poincaré Nancy 1, Faculté des Sciences, BP 239, 54506 Vandoeuvre-lès-Nancy Cedex, France.
authors.forename: Mounia
authors.initials: M
authors.lastname: Badis
authors.forename: M Hassan
authors.initials: MH
authors.lastname: Guermouche
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Bayle
authors.forename: Marek
authors.initials: M
authors.lastname: Rogalski
authors.forename: Ewa
authors.initials: E
authors.lastname: Rogalska
mesh_terms: D000388:Air; D001391:Azo Compounds / Q000737:chemistry*; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003460:Crystallization; D008567:Membranes, Artificial; D015394:Molecular Structure; D010316:Particle Size; D012965:Sodium Chloride / Q000737:chemistry; D013499:Surface Properties; D013816:Thermodynamics; D014867:Water / Q000737:chemistry
chemical_list: D001391:Azo Compounds; D008567:Membranes, Artificial; D014867:Water; D012965:Sodium Chloride