Fluorescence and Light Scattering Studies on Indole-3-Acetic Acid in Micellar Media

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Authors

  • 60, Central School Scheme, Near Air Force Officers' Mess, Jodhpur (Raj) ,IN
  • Department of Chemistry, J. N. Vyas University, Jodhpur 342 005 ,IN

DOI:

https://doi.org/10.18311/jsst/2008/1906

Keywords:

Surfactants, I-3-AA, Fluorescence, Solubilization.

Abstract

Indole-3-Acetic Acid (I-3-AA) is a phytochrome auxin found in tulip bulbs, in unripe pea seeds, in fungi and in rice cells. It is a plant growth hormone and is biologically and analytically an important molecule. Even small traces of I-3-AA can be assayed by using fluorimetric method. The enhanced fluorescence emission intensity as well as quantum yield values in microheterogeneous micellar environment prove that the suspending hydrophobic I-3-AA molecules are solubilized. The solubilizing action of surfactants on I-3-AA has been supplemented by light scattering studies and some theoretically calculated spectral parameters like empirical fluorescence coefficient (kf), fluorescence quantum yield (σf), molar extinction coefficient (ε) and Stokes' shift values.