Highly cooperative formation of bis-urea based supramolecular polymers.
Eleven bis-ureas have been synthesized, and some of their properties are reported. Several of these compounds form supramolecular polymers in organic solvents. The self-association is shown by FTIR spectroscopy to display cooperativity at two levels. The first level of cooperativity is due to the synergistic association of the two urea functions of a single molecule. The second level of cooperativity is revealed by the fact that the formation of dimers is less favored than that of long oligomers.
Laboratoire de Chimie des Polymères, UMR 7610, Université Pierre et Marie Curie, 4 place Jussieu, 75252 Paris Cedex 05, France.
Vesna
V
Simic
Laurent
L
Bouteiller
Matthieu
M
Jalabert