کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
220753 463350 2007 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Radical grafting of carbon surfaces with alkylic groups by mediated oxidation of carboxylates
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Radical grafting of carbon surfaces with alkylic groups by mediated oxidation of carboxylates
چکیده انگلیسی

The mediated oxidation of tetrabutylammonium acetate and 4-nitrophenylacetate was carried out in acetonitrile on glassy carbon electrodes. It is discussed that direct oxidation of aliphatic carboxylates, which give rise to a carbocationic chemistry, cannot induce covalent grafting of the carbon surface, however surface grafting is possible by using ferrocene derivatives as electron transfer mediators. Density functional theory has been used to model a radical grafting involving methyl groups. In addition semiempirical calculations have been performed for 4-nitrobenzyl additions, and a new anchoring pattern, is proposed. Coverage factors have been calculated for both kinds of radicals. Both, experimental and theoretical results support the covalent attachment of methyl groups on the carbon surface and the formation of a highly compact monolayer which does not allow the permeation of reversible redox molecules as small as the molecular oxygen.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 610, Issue 2, 1 December 2007, Pages 137–146
نویسندگان
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