کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5273994 1385502 2013 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemical characterization of bioactive hydroxyxanthones by cyclic voltammetry
ترجمه فارسی عنوان
مشخصات الکتروشیمیایی هیدروکسی سنتون های زیست فعال توسط ولتامتری سیکل
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی

The present study reports the electrochemical behavior of several phenolic and catecholic-substituted 2,3-diarylxanthones on a glassy carbon electrode, challenged by cyclic voltammetry at different pH values (4.0, 7.4, and 11.0). Higher pH values required lower anodic and cathodic peak voltages. The oxidation of catecholic groups occurred at lower peak potentials in a reversible and pH dependent manner. Anodic peak potentials appeared at higher pH values and were attributed to the electrochemically irreversible oxidation of the phenolic groups. The number and position of hydroxyl substituents were the determinants for the electrochemical behavior and found to correlate with the scavenging activity for reactive oxygen (ROS) and nitrogen species (RNS). A xanthone with two catechol units presented the lowest anodic potential voltage (Epa = 0.15 V) and proved to be the most effective ROS and RNS scavenger.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tetrahedron Letters - Volume 54, Issue 1, 2 January 2013, Pages 85-90
نویسندگان
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