INTERACTION OF PYRENE-3-SULFONATE WITH LIPID MONOLAYERS

Interaction of sodium pyrene-3-sulfonate (NaPyS) with different lipid monolayers has been studied by fluorescence and reflection spectroscop y, surface pressure measurements, and electrochemical methods. NaPyS i nteracts with dioctadecyldimethylammonium bromide (DOMA) monolayers at the air/water interface due to the Coulombic interaction with the pos itively charged head groups, while no interaction with dipalmitoylphos phatidylcholine (DPPC) monolayers has been noticed. NaPyS from solutio n also influenced DOMA monolayers which were transferred from the air/ water interface to the mercury surface. The enhancement of the transpo rt of cadmium ions across a DOMA film modified by NaPyS adsorption was observed.