کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1671952 1008926 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterization and electrochemistry of interfacial self-assembled multi-manganese(III)-porphyrin arrays
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Characterization and electrochemistry of interfacial self-assembled multi-manganese(III)-porphyrin arrays
چکیده انگلیسی

Electrochemical behaviors and catalytic oxidation of nitrite have been investigated by using the indium tin oxide (ITO) electrodes modified by the Langmuir–Blodgett (LB) films of manganese porphyrin and its palladium-mediated multiporphyrin arrays. The multiporphyrin arrays were prepared at the air–water interface. Surface pressure–area isotherms indicated that monolayers of the porphyrin of MnTPyP (TPyP: tetrapyridylporphyrin) could be stabilized on the sodium tetraphenylboron and K2PdCl4 subphase surfaces, but not on the pure water surface. These monolayers were transferred onto quartz and ITO substrate surfaces with the use of vertical dipping method, and characterized by using transmission electron microscope, UV–vis absorption and X-ray photoelectron spectra. For the electrodes modified by the porphyrin LB films, reversible Mn(II)TPyP ↔ Mn(III)TPyP and Mn(III)TPyP ↔ Mn(IV)TPyP redox couples were recorded, and centered at about − 0.17 and 0.52 V vs. Ag/AgCl, respectively. A high-valent Mn(V)TPyP intermediate was detected when the cyclic voltammograms were measured in an electrolyte solution containing sodium nitrite. These multiporphyrin arrays modified electrode showed very strong stability and reproductivity, resulting in potential applications in the development for the nitrite sensors and molecular catalysts of organic compounds.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 517, Issue 13, 1 May 2009, Pages 3760–3765
نویسندگان
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