عنوان المقالة: Micellar, salt, and organic solvent effects on the rate of [Cu(II)-Gly-L-Ala](+) complex-ninhydrin reaction
د. عادل أحمد محمد سعيد | Dr. Adel Ahmed Mohammed Seaad | 10671
نوع النشر
مجلة علمية
المؤلفون بالعربي
المؤلفون بالإنجليزي
Mohd.Akram, Adel A.M.Saeed and Kabir-ud-Din
الملخص الانجليزي
The kinetics of the title reaction has been investigated both in the aqueous and aqueous cationic micelles of tetradecyltrimethylammonium bromide (TTABr) solutions using UV–vis spectrophotometry at 343 K and pH 5.0. Ninhydrin reacts with [Cu(II)–Gly-l-Ala]+ complex in the stoichiometric ratio of 1:1 in both media. To explain the dependence of the reaction rate on [TTABr], pseudo-phase model proposed by Berezin et al. [27] and developed by Bunton [28] and Vera and Rodenas [29] was used. The reaction follows first- and fractional-order kinetics with respect to [Cu(II)–Gly-l-Ala]T+ and [ninhydrin]T, respectively, in aqueous and TTABr micelles. The values of km, kw, KA, KNin, Ea, ΔH#, ΔS#, and ΔG# have been calculated. The effect of inorganic (NaNO3, Na2SO4, Na3PO4)/organic (NaBenz, NaSal) salts and organic solvents on the reaction rate has also been seen. A mechanism consistent with observed kinetic data has been proposed.
تاريخ النشر
11/06/2015
الناشر
Elesiver-Journal of Molecular Liquids
رقم المجلد
209
رقم العدد
رابط DOI
http://dx.doi.org/10.1016/j.molliq.2015.05.044
الصفحات
367-373
رابط الملف
تحميل (0 مرات التحميل)
رابط خارجي
https://www.researchgate.net/publication/278715686_Micellar_salt_and_organic_solvent_effects_on_the_rate_of_CuII-Gly-L-Ala_complex-ninhydrin_reaction
الكلمات المفتاحية
[Cu(II)–Gly-l-Ala]+NinhydrinTTABrSaltsOrganic solvents
رجوع