Gemini 14-s-14 micelle-catalyzed study between ninhydrin and valine reaction by different techniques (spectroscopic and conductometric)

IF 2 3区化学 Q4 CHEMISTRY, PHYSICAL

Chemical Physics Pub Date : 2025-03-17 DOI:10.1016/j.chemphys.2025.112697

Dileep Kumar , Javed Masood Khan , Nazima Sultana , Mihalj Posa , Poonam Sharma , Bidyut Saha , Ajaya Bhattarai

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引用次数: 0

Abstract

Study between ninhydrin and valine (VL) reaction was investigated in 14-s-16 (s = 4 to 6) gemini surfactants (GS) by UV–visible spectroscopy. Rate constant (k_ψ) rises gradually and stays almost fixed with increasing [gemini]. Finally, at higher concentrations, we notice a sharp increment in rates. This uncommon influence of geminis at higher concentrations is assigned to modifications in their micellar structures. Catalytic behavior of geminis is unique and increased rates can be explained by applying a pseudo-phase model of micelles. Conductivity meter was employed to evaluate critical micellar concentration (cmc) of pure gemini micelles as well as their mixed system with reactants (ninhydrin and VL) at two different temperatures (303 K and 353 K). The cmc values of pure 14-s-14 surfactants at 303 K determined are concordant with the data obtained, previously. Several other constants and parameters, e.g., binding parameters, rate constants and thermodynamic quantities are also determined.

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来源期刊

Chemical Physics 化学-物理：原子、分子和化学物理

CiteScore

4.60

自引率

4.30%

发文量

278

审稿时长

39 days

期刊介绍： Chemical Physics publishes experimental and theoretical papers on all aspects of chemical physics. In this journal, experiments are related to theory, and in turn theoretical papers are related to present or future experiments. Subjects covered include: spectroscopy and molecular structure, interacting systems, relaxation phenomena, biological systems, materials, fundamental problems in molecular reactivity, molecular quantum theory and statistical mechanics. Computational chemistry studies of routine character are not appropriate for this journal.