title: Gelation by supramolecular dimerization of mono(urea)s.
abstract: Mono-ureido salicylic acid derivatives form hydrogen bonded dimers that mimic the gelation behaviour of covalently linked bis(urea)s. The 5-ureido salicylic acid isomers are much more effective gelators because of the lowered conjugation and less planar geometry, resulting in stronger urea···urea α-tape hydrogen bonding interactions.
authors.affiliation: Department of Chemistry, University of Durham, South Road, DH1 3LE, UK. jon.steed@durham.ac.uk.
authors.forename: Abigail E
authors.initials: AE
authors.lastname: Hooper
authors.affiliation: Department of Chemistry, University of Durham, South Road, DH1 3LE, UK. jon.steed@durham.ac.uk.
authors.forename: Stuart R
authors.initials: SR
authors.lastname: Kennedy
authors.affiliation: Department of Chemistry, University of Durham, South Road, DH1 3LE, UK. jon.steed@durham.ac.uk.
authors.forename: Christopher D
authors.initials: CD
authors.lastname: Jones
authors.affiliation: Department of Chemistry, University of Durham, South Road, DH1 3LE, UK. jon.steed@durham.ac.uk.
authors.forename: Jonathan W
authors.initials: JW
authors.lastname: Steed
mesh_terms: D019281:Dimerization; D005782:Gels / Q000737:chemistry*; D006860:Hydrogen Bonding; D008958:Models, Molecular; D020156:Salicylic Acid / Q000737:chemistry*; D014508:Urea / Q000031:analogs & derivatives*
chemical_list: D005782:Gels; D014508:Urea; D020156:Salicylic Acid