693-696The synthesis of phosphonic acid functionalized perylene diimide (PDI) molecular architecture has been demonstrated
via functionalization at imide position. UV-Vis absorption and fluorescence emission spectroscopic techniques have been
employed to investigate the photophysical properties of the novel PDI derivative at different pH (2 to 11). These results
demonstrate the fascinating photophysical characteristics based on change in pH from 7 to 2 and 7 to 11 in aqueous medium