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Microscale Vortex-assisted Electroporator for Sequential Molecular Delivery
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在超快的激发状态中,直接跟着溶剂进行质子转移
Sarah J Schmidtke1, David F Underwood, David A Blank
1Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, USA.
Journal of the American Chemical Society
|July 15, 2004
概括
溶剂重组通过移动平衡位置来动态控制1-chloroacetylaminoanthraquinone中激发状态的分子内质子转移,甚至在小于皮秒的时间尺度上.
科学领域:
- 摄影化学的使用.
- 物理化学 物理化学
- 频谱学是一种光谱学.
背景情况:
- 激发状态内分子质子转移 (ESIPT) 是光化学中的一个基本过程.
- 了解溶剂环境的作用对于阐明ESIPT机制至关重要.
- 1-chloroacetylaminoanthraquinone作为研究ESIPT的一个模型系统.
研究的目的:
- 为了研究溶剂动态对ESIPT在1-chloroacetylaminoanthraquinone的影响.
- 在质子转移事件期间直接探测溶剂反应.
- 为了确定溶剂重组对ESIPT的影响的时间表.
主要方法:
- 利用了新的二维非线性光学光谱学.
- 在质子转移期间实时检测溶剂反应.
- 作为溶剂,研究了在酸中作为溶剂的系统.
主要成果:
- 在ESIPT期间直接观察溶剂重组.
- 证据表明溶剂重组控制了质子转移.
- 在亚皮秒时间尺度上证明了兴奋状态平衡位置的动态转移.
结论:
- 溶剂重组是控制ESIPT在这个系统中的关键因素.
- 溶剂反应显著影响了兴奋状态动态.
- 亚皮秒溶剂动力学在控制质子转移过程中起着关键作用.
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