Antioxidant properties and free radical-scavenging reactivity of a family of hydroxynaphthalenones and dihydroxyanthracenones
作者:Jorge Rodríguez、Claudio Olea-Azar、Cristina Cavieres、Ester Norambuena、Tomás Delgado-Castro、Jorge Soto-Delgado、Ramiro Araya-Maturana
DOI:10.1016/j.bmc.2007.07.013
日期:2007.11
This study was undertaken to investigate the free radical-scavenging and antioxidant activities of various structurally related hydroquinones including hydroxynaphthalenones and dihydroxyanthracenones. Electron spin resonance spectroscopy and spin trapping techniques were used to evaluate the ability of hydroquinones to scavenge hydroxyl, diphenylpicrylhydrazyl, and galvinoxyl radicals. In addition
进行这项研究以研究各种结构相关的氢醌(包括羟基萘酮和二羟基蒽酮)的清除自由基和抗氧化活性。电子自旋共振光谱法和自旋俘获技术用于评估氢醌清除羟基,二苯基苦基肼基和加尔维诺尔自由基的能力。另外,使用荧光素(ORAC-FL)的氧自由基吸收能力测定用于获得这些自由基的相对抗氧化能力。在拟一阶条件下,获得了由2,2-二苯基-2-吡啶并肼基(k(2))提取的第一个H原子的速率常数。清除自由基的活性和k(2)值很好地区分了羟基萘酮和二羟基蒽酮,表明后者具有更好的抗氧化性能。上述实验数据与量子化学结果相符,表明分子内H键与自由基清除活性的相关性。