CƠ CHẾ PHẢN ỨNG CỦA 1-(4-METHOXYPHENYL)-2-SELENOUREA VÀ GỐC TỰ DO HOO BẰNG TÍNH TOÁN HÓA LƯỢNG TỬ
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Từ khóa

chất chống oxy hóa
HAT
SET
RAF
năng lượng phân ly liên kết
hằng số tốc độ

Cách trích dẫn

1.
Hương Đinh Q, Dương T, Nam PC. CƠ CHẾ PHẢN ỨNG CỦA 1-(4-METHOXYPHENYL)-2-SELENOUREA VÀ GỐC TỰ DO HOO BẰNG TÍNH TOÁN HÓA LƯỢNG TỬ. hueuni-jns [Internet]. 30 Tháng Sáu 2020 [cited 21 Tháng Mười-Một 2024];129(1C):5-14. Available at: https://jos.hueuni.edu.vn/index.php/hujos-ns/article/view/5695

Tóm tắt

Lý thuyết phiếm hàm mật độ (DFT) đã được sử dụng để nghiên cứu khả năng chống oxy hóa của 1-(4-methoxyphenyl)-2-thiourea (CH3O-PSeU) trong phản ứng với gốc tự do HOO. Ba cơ chế phản ứng là chuyển nguyên tử hydro (HAT), chuyển electron (SET), cộng gốc tự do (RAF) và các hằng số tốc độ phản ứng đã được khảo sát và tính toán. Kết quả cho thấy phản ứng chủ yếu xẩy ra theo cơ chế HAT. Lượng sản phẩm tạo ra theo cơ chế này chiếm 99,9 % tổng sản phẩm. N12-H13 là vị trí phản ứng chuyển nguyên tử hydro ưu tiên nhất với hằng số tốc độ 4,1×106 M-1·s-1.

https://doi.org/10.26459/hueuni-jns.v129i1C.5695
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