Volume 5, Issue 4-1, July 2017, Page: 1-7
A Comparative Study of Metachromasy Induced by Anionic Polelectroytes in Toluidine Blue
Nandini R., Dept. of Chemistry, MITE, Moodbidri, India
Vishalakshi B., Dept. of Chemistry, MITE, Moodbidri, India
Received: Feb. 13, 2017;       Accepted: Feb. 15, 2017;       Published: Mar. 6, 2017
DOI: 10.11648/j.sjc.s.2017050401.11      View  2332      Downloads  170
Abstract
The interaction of two anionic polyelectrolytes, namely, sodium alginate (NaAlg) & sodium heparin ate (NaHep) with a cationic dye Toluidine Blue (TB) has been investigated by spectrophotometric method. The polymers induced metachromasy in the dyes resulting in the shift of the absorption maxima of the dyes towards shorter wavelengths. The stability of the complexes formed between TB and sodiumalginate was found to be lesser than that formed between TB and sodiumheparinate. This fact was further confirmed by reversal studies using alcohols, urea and electrolytes. The interaction parameters revealed that binding between TB and anionic polyelectrolytes was mainly due to electrostatic interaction andhydrophobicforces. The effect of the temperature on to metachromasy has beendiscussed.
Keywords
Cationic Dye, Metachromasy, Polyelectrolyte’s, Aggregation, Temperature
To cite this article
Nandini R., Vishalakshi B., A Comparative Study of Metachromasy Induced by Anionic Polelectroytes in Toluidine Blue, Science Journal of Chemistry. Special Issue: Polyelectrolyte-Dye Interaction. Vol. 5, No. 4-1, 2017, pp. 1-7. doi: 10.11648/j.sjc.s.2017050401.11
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