title: Self-assembled pentamers and hexamers linked through quadruple-hydrogen-bonded 2-ureido-4[1H]-pyrimidinones.
abstract: The preorganization of bifunctional 2-ureido-4-pyrimidinones mediated by either 1,3-substituted adamantane or meta-substituted phenylene ring linkers leads to the preferred formation of stable pentameric (1)(5) and hexameric (2)(6) assemblies, respectively. Despite the high binding constant of the 2-ureido-4-pyrimidinone dimers and the highly preorganized structure of the monomer, the predominant formation of cycles (1)(5) and (2)(6) in solution occurs only within a specific concentration range.
authors.affiliation: Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, The Netherlands. e.w.meijer@tue.nl
authors.forename: Henk M
authors.initials: HM
authors.lastname: Keizer
authors.forename: Juan J
authors.initials: JJ
authors.lastname: González
authors.forename: Margarita
authors.initials: M
authors.lastname: Segura
authors.forename: Pilar
authors.initials: P
authors.lastname: Prados
authors.forename: Rint P
authors.initials: RP
authors.lastname: Sijbesma
authors.forename: E W
authors.initials: EW
authors.lastname: Meijer
authors.forename: Javier
authors.initials: J
authors.lastname: de Mendoza