%0 Journal Article
%A García Melo, Fátima
%A Buendía, Julia
%A Sánchez Martín, Luis
%T Supramolecular Ribbons from Amphiphilic Trisamides Self-Assembly
%D 2011
%@ 1520-6904
%U https://hdl.handle.net/20.500.14352/94845
%X Two amphiphilic C3-symmetric OPE-based trisamides have been synthesized and their self-assembling features investigated in solution and on surface. Variabletemperature UV vis experiments demonstrate the cooperative supramolecular polymerization of these trisamides that selfassemble by the operation of triple CdO 333 H N H-bonding arrays between the amide functional groups and π π stacking between the aromatic units. The helical organization of the aggregates has been demonstrated by circular dichroism at a concentration as low as 1 10 4 M in acetonitrile. In the reported trisamides, the large hydrophobic aromatic core acts as a solvophobic module impeding the interaction between the polar TEG chains and the amide H-bonds. This strategy makes unnecessary the separation of the amide functional groups to the polar tri(ethylene glycol) chains by paraffinic fragments. Achiral trisamide 1 self-assembles into flat ribbon-like structures that experience an amplification of chirality by the addition of a small amount of chiral 2 that generates twisted stripes
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