Structural and morphological studies of the dipeptide based L-Pro-L-Val organocatalytic gels and their rheological behaviour
Rodriguez-Llansola, F., Escuder, B., Hamley, I. W., Hayes, W. and Miravet, J. F. (2012) Structural and morphological studies of the dipeptide based L-Pro-L-Val organocatalytic gels and their rheological behaviour. Soft Matter, 8. pp. 8865-8872. ISSN 1744-683X
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To link to this article DOI: 10.1039/c2sm25647a
Organocatalytic gels based on the dipeptide sequence L-Pro-L-Val have been studied by two different FTIR techniques. This suggests a different arrangement of the gelator molecules in the self-assembled fibers depending on the organic solvent employed. In acetonitrile and nitromethane the structure of the supramolecular aggregates is similar and provides similar catalytic properties (supramolecularenhancement of basicity). In contrast, the self-assembled fibers obtained in toluene clearly presented a different molecular arrangement consistent with its different catalytic behaviour (enamine-based catalysis). In addition these gels have been studied by microscopy and rheology.