Thermodynamic Description of Bis-urea Self-Assembly: Competition between Two Supramolecular Polymers
- 14 November 2008
- journal article
- Published by American Chemical Society (ACS) in Langmuir
- Vol. 24 (24), 14176-14182
- https://doi.org/10.1021/la802367r
Abstract
Supramolecular polymers are chains of small molecules held together through reversible noncovalent interactions. In general, a given monomer self-assembles into a single type of supramolecular polymer. However, in a few cases, two different self-assembled structures can coexist; this yields interesting responsive systems. To improve the understanding of these systems, we report an association model describing the self-assembly of a supramolecular polymer into two competing forms. The parameters controlling the system were measured by high sensitivity differential scanning calorimetry and isothermal titration calorimetry in the case of a hydrogen-bonded bis-urea supramolecular polymer solution in toluene. The model enables us to compute the proportion and length of all components in the system at any temperature and concentration. The results of these calculations are in agreement with the experimental phase diagram and with independent viscosity measurements.Keywords
This publication has 43 references indexed in Scilit:
- Structure and Dynamics of a Bisurea-Based Supramolecular Polymer in n-DodecaneThe Journal of Physical Chemistry B, 2008
- Self-healing and thermoreversible rubber from supramolecular assemblyNature, 2008
- Rheological characterisation of bis-urea based viscoelastic solutions in an apolar solventJournal of Colloid and Interface Science, 2007
- Assembly via Hydrogen Bonds of Low Molar Mass Compounds into Supramolecular PolymersPublished by Springer Science and Business Media LLC ,2007
- Solvents with Similar Bulk Properties Induce Distinct Supramolecular ArchitecturesChemphyschem, 2006
- Thickness Transition of a Rigid Supramolecular PolymerJournal of the American Chemical Society, 2005
- Supramolecular PolymersPublished by Informa UK Limited ,2005
- Structural and Rheological Study of a Bis-urea Based Reversible Polymer in an Apolar SolventLangmuir, 2002
- Supramolecular PolymersChemical Reviews, 2001
- Soluble supramolecular polymers based on urea compoundsNew Journal of Chemistry, 2000