photophysical properties of a novel xanthene dye

Reactive dyes with fluorescent properties are among the most demanded. however, these dyes have a limit in hues since there is no full range of these dyes in the commercial. therefore, in this research, we presented a xanthene-based bi-functional reactive dye with the fluorescent property. in this regard, the first 2,4,6-trichloro-1,3,5-triazine was reacted with 1-amino-2- methoxy-4-beta-hydroxy ethyl sulphone sulfate ester, and then the obtained product was reacted with 2-(6-hydroxy-3-oxo-3h-xanthene-9-yl). the dye characteristics were studied by tlc, 1hnmr, 13cnmr, ftir, elemental analysis, uv-vis spectrophotometer, and spectrofluorimeter techniques. the photophysical properties of a synthesized dye, such as absorption and emission wavelength maxima, quantum yield, stokes shift, and energy yield, were measured. the effect of polarity of solvents on the photophysical properties of synthesized dye was explored using four polar and nonpolar solvents (water, dmf, methanol and acetone). the results indicated that the synthesized dye showed a positive solvatochromism effect. the absorption and emission wavelengths were 465-490 nm 498-538 nm, respectively. the quantum yield of synthesized dye was in a range of 0.04-0.66 in different solvents.