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Vol. 32 No. 8 (2020): Vol 32 Issue 8, 2020

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Kinetics of Dissociation of bis(2,4,6-Tripyridyl-s-triazine)iron(II) and tris(2,2′-Bipyridyl)iron(II) in the presence of Triton X-100/Tween 80 Mixed Micellar Medium

https://doi.org/10.14233/ajchem.2020.22709
R.S.S. Srikanth Vemuri
Department of Basic Science & Humanities, Vignan’s Institute of Engineering for Women, Kapujaggaraju Peta, Visakhapatnam-530049, India
P. Shyamala
Department of Physical and Nuclear Chemistry & Chemical Oceanography, School of Chemistry, Andhra University, Visakhapatnam-530003, India
Sk. Ameer Khan
Department of Physical and Nuclear Chemistry & Chemical Oceanography, School of Chemistry, Andhra University, Visakhapatnam-530003, India

Corresponding Author(s) : P. Shyamala

shyamalapulipaka06@gmail.com

Asian Journal of Chemistry, Vol. 32 No. 8 (2020): Vol 32 Issue 8, 2020

Abstract

Surface tension studies were carried on the binary surfactant mixtures over a wide range of Triton X-100 mole fractions and total surfactant concentrations to obtain critical micellar  concentration values. These values were used to determine the composition of the mixed micelles and the average interaction parameter (β) which contains all the interactions of the  mixed surfactants. The method is based on Rubingh′s theory using a Gauss-Newton iteration technique written in FORTRAN. The value of β was found to be -0.69 indicating synergistic  behaviour i.e., combined positive catalytic effect of both the surfactants on rates of reactions. Hence, the kinetics of dissociation of bis(2,4,6-tripyridyl-s-triazine) iron(II) ([Fe(tptz)2]2+) and  tris(2,2′-bipyridyl)iron(II) ([Fe(bipy)3]2+) were studied in the presence of Triton X-100/Tween 80 mixed micellar medium. The reactions have been carried out in the presence of mixed  micelles of Triton X-100/Tween 80 at various mole fractions of Triton X-100 (αTX-100 = [Triton X-100]/([Triton X-100] + [Tween 80])) and at different total surfactant concentrations of Triton X-100 and Tween 80 (Ct = [Triton X-100] + [Tween 80]). The results show that as αTX-100 increases the rate increases for all values of Ct. Kinetic analysis has been carried out by using a  simple pseudo phase model and binding constants were determined. These binding constants were found to be in agreement with the binding constants obtained spectrophotometrically.  

Keywords

s-Triazine Iron(II) 2,2′-Bipyridyl Mixed surfactants Triton X-100 Tween 80
Vemuri, R. S. ., Shyamala, P. ., & Khan, S. A. . (2020). Kinetics of Dissociation of bis(2,4,6-Tripyridyl-s-triazine)iron(II) and tris(2,2′-Bipyridyl)iron(II) in the presence of Triton X-100/Tween 80 Mixed Micellar Medium. Asian Journal of Chemistry, 32(8), 1955–1960. https://doi.org/10.14233/ajchem.2020.22709
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