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在孟加拉水/甲醇解决方案中连续调整系统间过境时间

Onno Strolka^1,2,3, Pascal Rauthe⁴, Tim Muschik⁴

¹Institute of Physical and Theoretical Chemistry, Eberhard Karls University of Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany.

The journal of physical chemistry. B

|November 27, 2024

概括

我们研究了孟加拉.

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:

孟加拉是一种光敏感剂,在光动力学治疗中具有应用.
了解其兴奋状态动态对于优化其疗效至关重要.
溶剂对光物理过程的影响是复杂的,需要详细的研究.

研究的目的:

调查溶剂成分对孟加拉的系统间交叉 (ISC) 时间的影响.
描述孟加拉在水/甲醇混合物中的兴奋状态吸收 (ESA) 动态.
建立孟加拉作为研究光物理上的溶剂效应的模型系统.

主要方法:

采用了5秒短暂宽带吸收光谱 (TAS).
对一系列水/甲醇分子分数进行了测量.
在可见 (∼430 nm) 和近红外 (∼1080 nm) 波长下监测了激发状态吸收.

主要成果:

发现Rose Bengal的系统间交叉 (ISC) 时间可以连续调节.
ISC时间从纯水中的74ps到纯甲醇中的405ps不等.
可见和近红外波长的短暂吸收数据为S1和T1状态动态提供了一致的证据.

结论:

这项研究表明,甲醇分子分数和ISC次数之间存在近线性关系.
孟加拉的光物理学受到溶剂环境的显著调节.
这项工作为利用Rose Bengal在激发状态下探测溶剂-溶解物相互作用提供了基础.

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