The aggregation behaviour and spectroscopic properties of a single-chain phoshate amphiphile possessing a chiral centre and an azobenzene chromophore have been examined. At neutral and alkaline pH, the bilayer dispersion contained helical structures and red-shifted (bathochromic) absorptions and enhanced CD spectra were observed under the conditions where this helical structure was formed. These morphological and spectral changes are explained in terms of ordering and hydrogen-bonded interactions at the bilayer surface. Effects of amines and metal-ion salts are similarly explained; in particular the strong binding of Ca2+ ions is thought to be due to the ordering of the surface phosphate groups.
|Number of pages||6|
|Journal||Journal of the Chemical Society, Perkin Transactions 2|
|Publication status||Published - Jan 1 1991|
All Science Journal Classification (ASJC) codes