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Kinetic study of dihydroxy-1,3-indanedione and aspartic acid in gemini (14-s-14) surfactants: a multi-technique approach.

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Title: Kinetic study of dihydroxy-1,3-indanedione and aspartic acid in gemini (14-s-14) surfactants: a multi-technique approach.
Authors: Kumar, Dileep1,2 (AUTHOR) kumar.dileep@vlu.edu.vn, Rub, Malik Abdul3 (AUTHOR) malikrub@gmail.com, Srivastava, Abhishek4 (AUTHOR) aabhichem@gla.ac.in, Sultana, Nazima5 (AUTHOR) sultana.nazima47@gmail.com, Posa, Mihalj6 (AUTHOR) mihaljp@uns.ac.rs, Sharma, Poonam7 (AUTHOR) drpoonamsharma@rediffmail.com, Saha, Bidyut8 (AUTHOR) b_saha31@rediffmail.com, Alzahrani, Khalid A.3,9 (AUTHOR) kaalzahrani1@kau.edu.sa, Bhattarai, Ajaya10 (AUTHOR) ajaya.bhattarai@mmamc.tu.edu.np
Source: Research on Chemical Intermediates. Dec2025, Vol. 51 Issue 12, p6819-6837. 19p.
Subjects: Aspartic acid, Micellar catalysis, Chemical kinetics, Surface active agents, Critical micelle concentration, Thermodynamic state variables, Organic compounds, Spectrophotometry
Abstract: The present work deals with kinetic study of dihydroxy-1,3-indanedione (Nin) and aspartic acid (AA) in gemini (14-s-14) surfactants at 343 K applying the UV spectrophotometric approach. The values of the rate constant (kψ) were determined in geminis by varying different experimental reaction ingredients, i.e., [Nin], [AA], pH and temperatures. The study follows a fractional- and first-order kinetics of paths in [Nin] and [AA], respectively. The effect of several concentrations of gemini surfactants ranging from 1 to 3000 × 10–5 mol dm−3 was carried out and kψ achieved at varied concentrations, thus, were recorded. Quantitative analyses of results calculated at [surfactants] are shown as kψ vs. [14-s-14] plot and are treated using a kinetic model called pseudo-phase model of micellar catalysis. To evaluate the critical micellar concentration (cmc) of pure gemini and gemini + reactants, a conductometric approach was applied under the current kinetic reaction conditions. Binding parameters (KX for AA and KY for Nin), micellar-rate constant (km) and thermodynamic parameters (ΔH#, ΔS# and Ea) are also determined and discussed, appropriately. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:The present work deals with kinetic study of dihydroxy-1,3-indanedione (Nin) and aspartic acid (AA) in gemini (14-s-14) surfactants at 343 K applying the UV spectrophotometric approach. The values of the rate constant (kψ) were determined in geminis by varying different experimental reaction ingredients, i.e., [Nin], [AA], pH and temperatures. The study follows a fractional- and first-order kinetics of paths in [Nin] and [AA], respectively. The effect of several concentrations of gemini surfactants ranging from 1 to 3000 × 10–5 mol dm−3 was carried out and kψ achieved at varied concentrations, thus, were recorded. Quantitative analyses of results calculated at [surfactants] are shown as kψ vs. [14-s-14] plot and are treated using a kinetic model called pseudo-phase model of micellar catalysis. To evaluate the critical micellar concentration (cmc) of pure gemini and gemini + reactants, a conductometric approach was applied under the current kinetic reaction conditions. Binding parameters (KX for AA and KY for Nin), micellar-rate constant (km) and thermodynamic parameters (ΔH#, ΔS# and Ea) are also determined and discussed, appropriately. [ABSTRACT FROM AUTHOR]
ISSN:09226168
DOI:10.1007/s11164-025-05756-5