Three amphiphilic azomethine dyes, (E)-N-octadecyl-2-[2-(4-N,N-dimethylaminophenyl)azomethinyl]quinolinium iodide, (E)N-octadecyl-4-[2-(4-N,N-dimethylaminophenyl)azomethinyl]quinolinium iodide, and (E)-N-octadecyl-6- [2-(4-N,N-dimethylaminophenyl)azomethinyl]quinolinium iodide, have been prepared by changing different relative positions of electron-accepting groups. They were successfully transferred onto indium-tin oxide slides by the Langmiur-Blodgett (LR) technique. Photoelectrochemical studies on these dyes' LB monolayer-modified ITO electrode were carried out. In 0.5 M KI solution containing 0.05 M I-2, the photocurrent generation quantum yield for these dyes varied from 7.2 to 15.9%, depending on the linking positions. Dependence of the photocurrent on the applied potential and the redox couple suggests that they undergo the photoinduced electron transfer mechanism of photoelectric conversion.