Effect of Quaternary Ammonium Gemini Surfactant Solution on the Rate Constant of the Ninhydrin–Lysine Reaction,Industrial & Engineering Chemistry Research

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Effect of Quaternary Ammonium Gemini Surfactant Solution on the Rate Constant of the Ninhydrin–Lysine Reaction
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2023-09-21 , DOI: 10.1021/acs.iecr.3c02499
Dileep Kumar _{1,

2} , Javed Masood Khan ₃ , Mihalj Posa ₄ , Ajmal Koya Pulikkal ₅ , Bidyut Saha ₆ , Ajaya Bhattarai ₇

Affiliation

The effect of solutions of double-chained quaternary ammonium gemini surfactants (16-s-16, s = 4–6) was characterized on the rate constant of the ninhydrin (nin) and lysine (Lys) reaction using a ultraviolet–visible (UV–vis) spectrophotometer. Rate constant (k_ψ) values were obtained at different geminis. However, k_ψ values obtained at several geminis were displayed in the form of the k_ψ–[gemini] rate profile, and the quantitative estimation of these results was elucidated employing a model of micellar catalysis referred to as pseudophase. The role of other experimental ingredients such as nin, Lys, pH, and temperature (T) was examined in geminis, and k_ψ values as a function of these parameters were determined. Data treatment confirms a fractional order in [nin] and a unity order in [Lys]. Using conductometric evaluation, the critical micellar concentration (cmc) of pure double-chained gemini surfactants (16–6–16, 16–5–16, and 16–4–16) and presence of nin and Lys were recorded. Results of the present experimental value were used to determine micellar binding constants (K_A for Lys and K_B for nin). The binding constants and second-order rate (k_m) affect the solvent properties at the micellar surface and hence are taken into consideration and discussed.

中文翻译：

季铵Gemini表面活性剂溶液对茚三酮-赖氨酸反应速率常数的影响

使用紫外-可见光 (UV) 表征双链季铵双子表面活性剂 (16- s -16, s = 4–6) 溶液对茚三酮 (nin) 和赖氨酸 (Lys) 反应速率常数的影响。 –vis) 分光光度计。在不同的双子座上获得速率常数 ( k _{ψ ) 值。}然而，在几个双子座上获得的k _ψ值以k _ψ -双子座速率曲线的形式显示，并且使用称为伪相的胶束催化模型阐明了这些结果的定量估计。其他实验成分的作用，如 nin、Lys、pH 和温度 ( T）在双子座中进行了检查，并确定了作为这些参数函数的k _ψ值。数据处理确认了 [nin] 中的分数阶和 [Lys] 中的单位阶。使用电导评估，记录纯双链双子表面活性剂（16-6-16、16-5-16 和 16-4-16）的临界胶束浓度 (cmc) 以及 nin 和 Lys 的存在。本实验值的结果用于确定胶束结合常数（K _A代表Lys，K _B代表nin）。结合常数和二阶速率（km）影响胶束表面的溶剂性质，因此被考虑和讨论_。

更新日期：2023-09-21

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