Photoionization of 3-Methylindole Embedded in Sodium Dodecyl Sulfate and Dodecyltrimethylammonium Chloride Micelles: Migration of Electrons Generated in Micelle Cores and Their Solvation in Outside Water
Photoionization of 3-Methylindole Embedded in Sodium Dodecyl Sulfate and Dodecyltrimethylammonium Chloride Micelles: Migration of Electrons Generated in Micelle Cores and Their Solvation in Outside Water
复制标题
嵌入十二烷基硫酸钠和十二烷基三甲基氯化铵胶束中的 3-甲基吲哚的光电离：胶束核心中产生的电子的迁移及其在外部水中的溶剂化
DOI：
10.1021/acs.jpclett.2c03799
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Iwata Koichi
中科院分区：
文献类型：
--
作者：
Goryo Shion;Iwata Koichi
通过嵌入核心中的 3-甲基吲哚的光电离，在由带负电的十二烷基硫酸钠 (SDS) 或带正电的十二烷基三甲基氯化铵 (DTAC) 形成的胶束核心中产生电子。电子从核心移出到外部水相后发生水合。这些过程通过飞秒时间分辨吸收光谱进行监测。电子从胶束核心迁移到外部水相的速度比仪器响应时间 200 fs 还要快。水相中的热电子在≤320 fs内产生。对于带负电荷的 SDS 和带正电荷的 DTAC 的胶束溶液或水，没有观察到显着差异。一旦在外部水相水合的电子与胶束核心中剩余的自由基阳离子分离，电子和自由基阳离子之间的双子复合就会在很大程度上受到阻碍。
Electrons were generated in the core of micelles formed by negatively charged sodium dodecyl sulfate (SDS) or positively charged dodecyltrimethylammonium chloride (DTAC) by photoionization of 3-methylindole embedded in the core. The electrons were hydrated after they moved out of the core to the outer aqueous phase. These processes were monitored with femtosecond time-resolved absorption spectroscopy. The migration of electrons from the micelle core to the outer aqueous phase was faster than the instrumental response time of 200 fs. Hot electrons in the aqueous phase were produced in ≤320 fs. There was no significant difference observed for the micellar solutions of negatively charged SDS and positively charged DTAC, or for water. The geminate recombination between the electrons and the radical cations was hindered to a large extent once the electrons hydrated at the outer aqueous phase were separated from the radical cations remaining in the micelle core.