کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
220541 463337 2008 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemical and structural properties of 1,3-substituted (–Cl, –Br) phenyl-5-phenylformazans
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Electrochemical and structural properties of 1,3-substituted (–Cl, –Br) phenyl-5-phenylformazans
چکیده انگلیسی

In this study, 1-[o-, m-, p-(chloro, bromo)]-3-(m-nitrophenyl)-5-phenylformazans were synthesized. Their structures were elucidated and spectral behaviors were investigated using elemental analysis, GC–mass, 1H NMR, 13C NMR, FTIR and UV–vis spectra. Electrochemical properties of formazans such as number of electrons transferred (n), diffusion coefficient (D) and heterogeneous rate constant (ks) of the compounds were determined and possible mechanisms were proposed with the use cyclic voltammetry, ultramicrodisc electrode and chronoamperometry. The relation between their absorption properties and electrochemical properties was sought. The redox characteristics of these compounds have been investigated in nonaqueous dimethylsulfoxide at platinum and ultramicro platinum (10 μm) electrodes. Through controlled potential electrolysis, the oxidation products of each class of compounds can be separated and identified. The oxidation mechanism is suggested and it is proved. A correlation was obtained between λmax with Hammett substituent coefficient, Eox1 and Ered1.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volumes 619–620, 15 July 2008, Pages 105–116
نویسندگان
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