Related Experiment Video
Updated: Jun 29, 2026

Synthesis and Characterization of Supramolecular Colloids
Published on: April 22, 2016
Highly cooperative formation of bis-urea based supramolecular polymers
Vesna Simic1, Laurent Bouteiller, Matthieu Jalabert
1Laboratoire de Chimie des Polymères, UMR 7610, Université Pierre et Marie Curie, 4 place Jussieu, 75252 Paris Cedex 05, France.
Abstract:
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.
Related Concept Videos
Aldehydes and Ketones with Amines: Imine and Enamine Formation Overview
Preparation of Amides
The DCC-promoted synthesis of amides begins with the protonation of DCC by carboxylic acid. The protonation makes it a better acceptor. Next, the addition of carboxylate to the protonated carbodiimide gives a reactive acylating agent.
Subsequently, the amine acts as a nucleophile that attacks the acylating agent to form a tetrahedral intermediate. In the...
Aldehydes and Ketones with Amines: Imine Formation Mechanism
Imines are formed under mildly acidic conditions. A pH of 4.5 is ideal for the reaction.
If the pH is low or the solution is too acidic, the reaction slows down in the...
Anionic Chain-Growth Polymerization: Overview
Step-Growth Polymerization: Overview
Many natural and synthetic polymers are produced by...
Aldehydes and Ketones with Amines: Enamine Formation Mechanism

