In this study, the effect of pH and counterion type on the physical properties and chiral recognition ability of amino acid based macromolecular assemblies formed from amino acid based surfactants were investigated.  The amino acid based surfactants examined in this study were: undecanoyl alanine, aminobutyric acid, norvaline, and norleucine. Also included in this study were five diamine counterions of varying chain lengths.  The counterions under study were   1,2-ethylenediamine, 1,3-propanediamine, 1,4-diaminobutane, 1,5-diaminopentane, and 1,6-diaminohexane.  These systems were studied using Diffusion Ordered NMR Spectroscopy (DOSY), fluorescence, dynamic and light scattering, surface tensiometry and capillary electrophoresis.  Preliminary results suggests that at low pH the positively charged diamine counterions act to bridge two amino acid based surfactants while at higher pH the bridging ability of the counterion decreases thus affecting the size and shape of the macromolecular assemblies formed. <br/>

Effect of diamine counterion chain length and pH on the physical properties and chiral recognition ability of amino acid based macromolecular assemblies

255th National Meeting (2018)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.