Cyclic Bis-Urea Compounds as Gelators for Organic Solvents

• Published in: Chemistry : a European journal Vol. 5; no. 3; pp. 937 - 950
• Main Authors: van Esch, Jan H., Schoonbeek, Franck, de Loos, Maaike, Kooijman, Huub, Spek, Anthony L., Kellogg, Richard M., Feringa, Ben L.
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01.03.1999; WILEY‐VCH Verlag; Wiley
• Subjects: Chemistry; Chemistry, Multidisciplinary; Electron microscopy; Gels; Hydrogen bonds; Molecular modeling; Physical Sciences; Science & Technology; Self-assembly; GEL PHASE; ENERGY; BEHAVIOR; POLYMORPHISM; GELATION; hydrogen bonds; MOLECULES; self-assembly; gels; molecular modeling; CRYSTALS; electron microscopy; AGGREGATION; HYDROCARBON; LIQUIDS

Self‐assembly of cyclic bis‐urea compounds takes place even at low concentrations to form very thin fibers which give a three‐dimensional network in the solvent. The X‐ray structure indicates that the molecules assemble into one‐dimensional chains in which each unit forms eight hydrogen bonds with i...