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在分子七度中利用潜在逆转用于光诱导的多电子转移和积
Julia Nomrowski1, Oliver S Wenger1
1Department of Chemistry , University of Basel , St. Johanns-Ring 19 , 4056 Basel , Switzerland.
Journal of the American Chemical Society
|April 14, 2018
概括
这项研究展示了一种利用光来储存两个电子的分子系统,从而实现高效的多电子催化. 这一突破推动了人造光合作用和氧化还原能量储存.
科学领域:
- 分子化学
- 摄影化学
- 催化剂
背景情况:
- 多电子转移的人工系统对于储能和催化是至关重要的.
- 在分子组合中控制氧化还原状态仍然是一个重大挑战.
研究的目的:
- 开发一种能够进行光诱导多电子转移和可逆氧化还原等效积累的分子系统.
- 为了研究一个接受分子的潜在反转增强的电荷存储.
- 展示该系统用于多电子光电还原催化.
主要方法:
- 由捐赠者,光敏剂和受体组成的分子合.
- 电化学表征以确定还原潜力和逆转潜力.
- 光化学研究以评估电荷分离状态的形成,寿命和量子产量.
- 催化实验使用heptad来减少亚硫化物.
主要成果:
- 一个分子达实现了光诱导的两电子转移和积累.
- 对于二[1,2]狄受体,观察到一个显著的电位逆转 (1.3 V).
- 形成了一个稳定的两电子减少状态,寿命为66 ns,量子产量为0.5%.
- 酸催化了二电子减少的酸硫化物.
结论:
- 在人工系统中,潜在逆转是一种可行的光驱氧化还原剂积累策略.
- 证明的电荷积累状态作为多电子光电还原催化物的有效平台.
- 这项工作为先进的氧化还原能储存和催化应用提供了概念验证.
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