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Cyclic Bis‐Urea Compounds as Gelators for Organic Solvents
Author(s) -
van Esch Jan H.,
Schoonbeek Franck,
de Loos Maaike,
Kooijman Huub,
Spek Anthony L.,
Kellogg Richard M.,
Feringa Ben L.
Publication year - 1999
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/(sici)1521-3765(19990301)5:3<937::aid-chem937>3.0.co;2-0
Subject(s) - urea , solvent , hydrogen bond , molecule , chemistry , organic solvent , polymer chemistry , organic chemistry , materials science , chemical engineering , engineering
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 its neighbors (see picture).