PHOTOPHYSICAL PROPERTIES OF SOME BENZOXAZOLE AND BENZOTHIAZOLE DERIVATIVES

The photophysical properties of the solution of benzoxazole (BNX S ) and benzothiazole (BNT S ) derivatives have been studied; the fluorescence properties have been studied in chloroform solvent, as well as, fluorescence quantum yield calculated using fluorescein as standard material. The changing of their color and UV-vis absorption spectra according to pH solution variation was studied in ethanol 95%. Laboratory prepared mixture of phosphorus acid/phosphorus pentoxide were used as catalyst.