Effect of temperature on the photobehavior of Rose Bengal associated with dipalmitoylphosphatidyl choline liposomes

► Association and photobehavior of RB in presence of DPPC liposomes is determined by the temperature. ► Above the main phase transition the incorporation of the dye is ca. 2.5 times more efficient than in the gel state. ► In the liquid crystalline state the surrounding of the dye is more polar and production of 1O2 is less efficient than in the gel state.