کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5411752 | 1506582 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Zinc dipeptide complex ([Zn(II)-Gly-Tyr]+)-ninhydrin reaction in the presence of gemini surfactants: A kinetic study
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Kinetics of the title reaction has been carried out by studying the reaction spectrophotometrically at 353 K and pH 5.0 in the presence of cationic gemini (alkanediyl-α, Ï-bis(dimethylhexadecylammonium bromide)) surfactants. The reaction followed first-order kinetics in [Zn(II)-Gly-Tyr]T+ complex and fractional-order kinetics in [ninhydrin]T. In addition to the rate constant (kΨ) increase and leveling-off regions, typically observed in case of conventional monomeric surfactant (e.g., CTAB) catalyzed reactions, a third region of increasing kΨ was seen at higher gemini surfactant concentrations. The data are interpreted in terms of pseudo-phase model (assuming the association/incorporation of both the reactants at the micellar surface) and changes in micellar morphology occurring at higher gemini concentrations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 188, December 2013, Pages 61-66
Journal: Journal of Molecular Liquids - Volume 188, December 2013, Pages 61-66
نویسندگان
Mohd. Akram, Dileep Kumar, Kabir-ud-Din Kabir-ud-Din,