The mechanism study of enhanced antioxidant capacity: Intermolecular hydrogen bonds between epigallocatechin gallate and theanine in tea

• DOI: 10.1016/j.lwt.2023.115523
• Publication Date: 2023-11-10T16:26:00Z
• Authors: Yanyan Wang; Ning Deng; Shiting Wen; Xintong Wang; Ximing Huang; Alin Xia
• Keywords: Gallate; Theanine

The interactions between various substances in foods have significant implications for their nutritional values. antioxidant capacity of polyphenols tea can also be modulated by with other substances. In this study, the intermolecular hydrogen bonds epigallocatechin gallate (EGCG) and theanine, as well capacity, were both analyzed demonstrated. results showed that antiradical activity against DPPH• increased approximate 2.4 %, relative cellular PC12 cells peroxide 3.4 when appropriate theanine was added to EGCG. This phenomenon could interpreted EGCG which activated phenol hydroxyl group EGCG, inducing departure proton electron. Therefore, enhanced. proposed mechanism verified electrochemical methods density functional theoretical calculations. Electrochemical confirmed exhibited shift redox peaks before after formation bonds. HOMO-LUMO energy gap obtained calculation reduced bonding theanine.