کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
49322 46736 2016 3 صفحه PDF ندارد دانلود رایگان
عنوان انگلیسی مقاله
Substrate ionization energy influences the epoxidation of m-substituted styrenes catalyzed by chloroperoxidase from Caldariomyces fumago
ترجمه فارسی عنوان
انرژی بسترهای یونیزاسیون اپوکسیداسیون از styrenes-M تعویض کاتالیست chloroperoxidase از fumago Caldariomyces تحت تاثیر
کلمات کلیدی
Chloroperoxidase؛ اپوکسیداسیون؛ M-جایگزین استایرن؛ انرژیهای یونیزه
Chloroperoxidase; Epoxidation; m-Substituted styrene; Ionization energies
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی


• Chloroperoxidase catalyzed epoxidation of m-substituted styrene.
• The catalytic activity was m-aminostyrene > styrene > m-methylstyrene > m-chlorostyrene > m-nitrostyrene.
• Ionization energy of the substrates was calculated at B3LYP level of theory.
• The ionization energy of m-substituted styrene modulated the epoxidation activity.

Chloroperoxidase from the fungus Caldariomyces fumago is a versatile heme-peroxidase, which is able to catalyze olefin epoxidation. In this report, the epoxidation of m-substituted styrene catalyzed by chloroperoxidase was studied. The catalytic data fit the Hill's model, and the activity rate (kcat) constants were strongly dependent of nature of substituents. The epoxidation kcat values varied as follows: m-aminostyrene > styrene > m-methylstyrene > m-chlorostyrene > m-nitrostyrene. The catalytic rate constant for m-aminostyrene, an electron-releasing substituent, was 298 times higher than these for m-nitrostyrene, an electron-withdrawing compound. These results were quantitatively analyzed and a good linear correlation between the experimental catalytic constants of m-substituted styrenes and their ionization energies, calculated at B3LYP level of theory, was demonstrated.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Communications - Volume 77, 5 March 2016, Pages 52–54
نویسندگان
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