BENZOPHENONE‐SENSITIZED LIPID PEROXIDATION IN LINOLEATE MICELLES
BENZOPHENONE‐SENSITIZED LIPID PEROXIDATION IN LINOLEATE MICELLES
复制标题
亚油酸酯胶束中二苯甲酮敏化脂质过氧化
DOI：
10.1111/j.1751-1097.1993.tb09569.x
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发表时间：
1993
影响因子：
3.3
通讯作者：
Larry K. Patterson
中科院分区：
文献类型：
--
作者：
D. Z. Markovic;Larry K. Patterson
摘要-研究了亚油酸胶束中的二苯甲酮光敏化过氧化反应（I型反应），并获得了敏化剂光解和脂质过氧化反应的量子产率。二苯甲酮及其衍生物二苯甲酮-4 ′-庚基-4-戊酸（BHPA）在本研究中用作敏化剂。氢过氧化物形成的量子产率为1.2，与二苯甲酮消失的量子产率为0.41（在相同的亚油酸酯胶束溶液）相比，得到了1.3和0.6的产率被发现可比系统中，其中BHPA是敏化剂。虽然这样的数据是一致的链反应的过氧化反应机理，它是必要的，以了解在这些系统中的链反应长度到达引发物种的产率。这种产率已经通过闪光光解测定。敏化剂的光解和氢过氧化物产量对亚油酸浓度的依赖关系也已确定，以阐明胶束形成或分子组织的过氧化过程中的影响。此外，在饱和的表面活性剂（脂质）系统中的比较，氢提取的光分解技术在十二烷基硫酸钠单独使用这两种敏化剂进行了研究。
Abstract— Benzophenone‐photosensitized peroxidation in linoleic acid micelles (Type I reaction) has been investigated and quantum yields of both sensitizer photolysis and lipid peroxidation have been obtained. Benzophenone as well as its derivative, benzophenone‐4′‐heptyl‐4‐pentanoic acid (BHPA) have been utilized as sensitizers in this study. A quantum yield of 1.2 for hydroperoxide formation, compared with a benzophenone disappearance quantum yield of 0.41 (in the same linoleate micellar solution) was obtained; yields of 1.3 and 0.6 were found for comparable systems in which BHPA was the sensitizer. Although such data are consistent with the peroxidation mechanism of chain reaction, it is necessary to know the yields of initiating species to arrive at chain reaction lengths in these systems. Such yields have been determined by flash photolysis. The dependencies of sensitizer photolysis and hydroperoxide yields on linoleate concentration have also been determined in order to elucidate the effects of micelle formation or molecular organization on the peroxidative process. Additionally, for comparison in a saturated surfactant (lipid) system hydrogen abstraction was investigated by photolysis techniques in sodium dodecyl sulfate alone using these two sensitizers.