کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
610958 880663 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemically controlled release of α,β,γ,δα,β,γ,δ-tetrakis(4-N-methylpyridyl)porphine from layer-by-layer thin films
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Electrochemically controlled release of α,β,γ,δα,β,γ,δ-tetrakis(4-N-methylpyridyl)porphine from layer-by-layer thin films
چکیده انگلیسی

The release of α,β,γ,δα,β,γ,δ-tetrakis(4-N-methylpyridyl)porphyrin (TMPyP) from layer-by-layer assembled thin films composed of poly(allylamine hydrochloride) (PAH) and poly(acrylic acid) (PAA) was electrochemically controlled. The release rate of TMPyP was enhanced when a positive electrode potential (+1.2 to +1.5 V) was applied to the glassy carbon electrode on which TMPyP-loaded PAH/PAA film was coated, while the effect of lower electrode potentials (0 to +1.0 V) was negligibly small. The effect of applied potential on the release rate was more significant at pH 7.4 than in the solutions of pH 8.0 and 9.0. The electrochemically enhanced release of TMPyP was rationalized based on local pH change in the vicinity of the electrode surface, which was induced by electrolysis of H2O.

The release of TMPyP from layer-by-layer thin film can be accelerated by applying electric potential.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 333, Issue 1, 1 May 2009, Pages 141–144
نویسندگان
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