Synthesis, characterization and self-assembly of novel bisamides: Investigation of their gelation and mesomorphic properties

ORGN 232

Suresh Valiyaveettil and Akhila Jayaraman. Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
Self-assembly of amides are interesting due to their structural resemblance to bioactive peptides and proteins. A series of bisamides with varying spacers were synthesized and their self assembly studies are reported. The gelation ability and liquid crystalline properties of the bisamides were investigated. The molecular interactions in these compounds are important factors contributing towards their self-assembly. Diamides with methylene spacers showed properties similar to low molecular weight organogels in acetonitrile. The diameter of the fibres ranged from a few nanometers to micrometers. The gels were characterized by SEM and TEM. By varying the spacer from aliphatic to aromatic groups led to the loss of gelating properties of the diamides in various solvents.