کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
195687 | 459819 | 2006 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Cathodic reduction of acids in dimethylformamide on platinum
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
A linear correlation was shown to exist between the acidity and the cyclic voltammetric half-potential of the reduction of acids in DMF for carboxylic and N-acids in the pKa range of 6–16. Chlorophenols are reduced at slightly lower potentials giving a separate parallel line. Applying the obtained equation and employing the same method to literature data in DMSO, the pKa values for conjugate aids of DMF and DMSO can be calculated, showing DMSO·H+ to be more acidic (pKa = 2.9) than DMF·H+ (pKa = 5.7). The analysis of cyclovoltammetric data demonstrated that a CE mechanism operates in the reduction of strong acids, including the conjugate acid of DMF. Weaker acids are reduced by direct discharge or a mixed mechanism.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 51, Issue 11, 15 February 2006, Pages 2306–2314
Journal: Electrochimica Acta - Volume 51, Issue 11, 15 February 2006, Pages 2306–2314
نویسندگان
Stefan S. Kurek, Barbara J. Laskowska, Andrzej Stokłosa,