title: Organogels based on 1H-imidazolecarboxamide amphiphiles.
abstract: We prepared 1H-imidazolecarboxamide amphiphiles as potential organogelators. Compounds A1-A3, in which an imidazole head was connected to a hydrophobic trialkyloxyphenyl group, showed an ability to gelate nonpolar solvents, including alkanes. The dry gels obtained from compounds A1-A3 had columnar hexagonal structures. Polycatenar 1H-imidazolecarboxamide amphiphile B2, consisting of a 1H-imidazole head connected through a benzene ring to a tridecyloxyphenyl tail, formed an organogel in DMSO. In a concentrated THF solution (30 wt %), compound B2 exhibited a lyotropic liquid-crystalline phase with a columnar hexagonal structure. X-ray diffraction (XRD) results suggested a molecular arrangement consisting of a disk, via hydrogen bonding between successive imidazole moieties, and an assembly of columnar structures.
authors.affiliation: Department of Materials Science and Engineering, College of Engineering, Seoul National University, Seoul 151-744, Korea.
authors.forename: Sang Hyuk
authors.initials: SH
authors.lastname: Seo
authors.forename: Jun Ha
authors.initials: JH
authors.lastname: Park
authors.forename: Ji Young
authors.initials: JY
authors.lastname: Chang