Effect of Surfactants on Fluorescence Spectra of A Substituted - Naphthalene Sulphonic Acid

Shuchi Goyal and S. Acharya*

Photochemistry Laboratory, Department of Chemistry, J.N. Vyas University, Jodhpur (India)

The present paper reports the solubilization action of surfactants on 8-Anilinophthalein-1-Sulphonic acid (8-ANSA). It has been studied with the help of fluorescence-spectroscopy. The fluorescence peak height at lem 515 nm increased on increasing the concentration of the surfactant solution. A hypsochromic shift in the emission peak wavelength also occurred. The solubilization phenomenon was also confirmed by absorption spectral studies and light scattering measurements. The fluorescence quantum yields of 8-ANSA was also measured in different concentration of the surfactants, using anthracene as the fluorescence standard. The results have been attributed to the action of micelle formation of the surfactant.

Surfactants; fluorescence spectra; 8-Anilinonapthalein-1-Sulphonic acid (8-ANSA)