Energy and electron transfer reactions of polyenic acids with variable chain lengths
作者:Asma Zaidi、He Li、Hans-Richard Sliwka、Vassilia Partali、Hansgeorg Ernst、Thor B. Melø
DOI:10.1016/j.tet.2012.10.041
日期:2013.1
Highly unsaturated conjugated fatty acids (carotenoic acids) with 5–15 conjugated double bonds were irradiated by flash pulses in the presence of the sensitizer riboflavin. The resulting triplet and radical cation transients were analyzed and the underlying energy and electron transfer reactions determined experimentally and by calculation. The two key antioxidant reactions of carotenoids summarize in ar
在存在核黄素敏化剂的情况下,通过闪光脉冲辐照具有5–15个共轭双键的高度不饱和共轭脂肪酸(胡萝卜酸)。分析了所得的三重态和自由基阳离子瞬态,并通过实验和计算确定了潜在的能量和电子转移反应。类胡萝卜素的两个关键抗氧化反应总结为r,即电子和能量转移的反应常数之比。在具有11个双键的多烯酸中累积的最佳抗氧化剂比率a r。通过酸与FeCl 3的反应化学确定自由基阳离子的光物理形成。