Abstract :
The amphiphilic chromo-ionophore 2-[(1E,3E)-4-(2,3,5,6,8,9,11,12,14,15-decahydro-1,7,10,16,4,13-benzotetraoxadithiacyclooctadecin-
18-yl)-1,3-butadienyl]-3-octadecyl-1,3-benzothiazol-3-ium perchlorate (AB211) forms mixed monolayers at
the air–water interface with the phospholipid L-a-dimyristoylphosphatidylcholine (DMPC) as deduced from surface pressure–
area and surface potential–area isotherms. In contrast to the behaviour of pure monolayers of AB211 on water, no association of
the chromophores is observed by reflection spectroscopy. Upon compression of the mixed monolayer AB211:DMPC = 1:5, a reorientation
of the chromophores from flat to tilted is observed, presumably assisted by the stretching of the choline group of the
phospholipid molecules acting a matrix
