عنوان المقالة: Catalytic Effect of Cationic Gemini Micelles on the Rate of Condensation between Glycyl-DL-Aspartic Acid and Ninhydrin in Absence and Presence of Organic Solvents
د. عادل أحمد محمد سعيد | Dr. Adel Ahmed Mohammed Seaad | 13934
Publication Type
Journal
Arabic Authors
English Authors
Mohd. Akram • Adel A. M. Saeed • Kabir-ud-Din
Abstract
The reaction between glycyl-DL-aspartic acid (Gly-DL-Asp) and ninhydrin has been investigated in cationic gemini surfactants [alkanediyl-a,x-bis (dimethyltetradecylammonium bromide)] (14-m-14). The study was carried out as functions of [Gly-DL-Asp], [ninhydrin], solvent (v/v %) and [surfactant] at pH = 5.0 and 70 C. The reaction followed first-order kinetics in [Gly-DL-Asp] and fractional-order kinetics in [ninhydrin]. The reaction is catalyzed by TTABr/14-m-14. Addition of an organic solvent at fixed [surfactant] increases the absorbance as well as the rate of formation of Ruhemann’s purple. The results obtained in micellar media are treated quantitatively in terms of pseudophase and Piszkiewicz kinetic models. The Eyring equation is valid for the reaction over the range of temperatures used and different activation parameters have been evaluated. The kinetic data have been used to calculate the micellar binding constants KS for Gly-DL-Asp and KN for ninhydrin.
Publication Date
7/29/2015
Publisher
Springer-J Solution Chem
Volume No
44
Issue No
DOI
https://doi.org/10.1007/s10953-015-0360-y
Pages
1529–1544
File Link
تحميل (0 مرات التحميل)
External Link
https://link.springer.com/article/10.1007/s10953-015-0360-y#citeas
Keywords
Glycyl-DL-aspartic acid Ninhydrin Micellar catalysis Gemini surfactants Organic solvents
رجوع