title: A family of hydrogels based on ureido-linked aminopolyol-derived amphiphiles and bolaamphiphiles: synthesis, gelation under thermal and sonochemical stimuli, and mesomorphic characterization.
abstract: This article describes the systematic preparation of a novel family of carbohydrate amphiphiles and bolaamphiphiles in which hydrophilic and hydrophobic units are connected via a ureido or bis(ureido) moiety. The sugar core is derived from aminopolyols such as D-glucamine (1), N-methyl-D-glucamine (2), or the sugar-like species tris(hydroxymethyl)aminomethane (3). The O-unprotected derivatives behave as self-organizing nonionic surfactants with good water gelation ability, which can be induced under thermal or ultrasound-driven stimuli. In addition, some derivatives of 1 and 2, and rarely 3 also formed lyotropic liquid crystals with lamellar or hexagonal structures that exhibit low-temperature transitions.
authors.affiliation: Dpto. de Química Orgánica e Inorgánica, Facultad de Ciencias-UEX, 06071 Badajoz, Spain.
authors.forename: Martín
authors.initials: M
authors.lastname: Avalos
authors.forename: Reyes
authors.initials: R
authors.lastname: Babiano
authors.forename: Pedro
authors.initials: P
authors.lastname: Cintas
authors.forename: Antonio
authors.initials: A
authors.lastname: Gómez-Carretero
authors.forename: José L
authors.initials: JL
authors.lastname: Jiménez
authors.forename: Marina
authors.initials: M
authors.lastname: Lozano
authors.forename: Angel L
authors.initials: AL
authors.lastname: Ortiz
authors.forename: Juan C
authors.initials: JC
authors.lastname: Palacios
authors.forename: Aurora
authors.initials: A
authors.lastname: Pinazo