In:
International Journal of Chemical Kinetics, Wiley, Vol. 55, No. 8 ( 2023-08), p. 431-440
Abstract:
In CTAB micellar medium, the kinetic investigation of Ru(III) promoted oxidation of L‐glutamic acid (Glu) by [Fe(CN) 6 ] 3− was carried out by recording the decline in absorbance at 420 nm, which corresponds to [Fe(CN) 6 ] 3− . By adjusting one variable at a time, the progression of the reaction has been inspected as a function of [OH − ], ionic strength, [CTAB] , [Ru 3+ ], [Glu] , [Fe(CN) 6 3− ], and temperature using the pseudo‐first‐order condition. The findings demonstrate that [OH − ], [CTAB] , and [Glu] are the key parameters that have a discernible impact on reaction rate. In the studied concentration range of Ru(III), [Fe(CN) 6 ] 3− , and at lower [Glu] and [OH − ], the reaction displays first‐order kinetics. The incremental trend in reaction rate with electrolyte concentration demonstrates a positive salt effect. CTAB substantially catalyzes the process, and after reaching a maximum, the rate remains nearly constant at increased [CTAB] . The observed decline in the CMC of CTAB may be caused by the reduced repulsion between the positively charged heads of the surfactant molecules caused by the negatively charged OH − , and [Fe(CN) 6 ] 3− . The activation parameters also support the outer‐sphere electron transfer mechanism as recommended by us.
Type of Medium:
Online Resource
ISSN:
0538-8066
,
1097-4601
Language:
English
Publisher:
Wiley
Publication Date:
2023
detail.hit.zdb_id:
1480875-4
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