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首页> 外文期刊>Journal of physical chemistry letters >Capturing Structural Snapshots during Photochemical Reactions with Ultrafast Raman Spectroscopy: From Materials Transformation to Biosensor Responses
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Capturing Structural Snapshots during Photochemical Reactions with Ultrafast Raman Spectroscopy: From Materials Transformation to Biosensor Responses

机译：用超快拉曼光谱法捕获光化学反应过程中的结构快照：从材料转化到生物传感器反应

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摘要

Chemistry studies the composition, structure, properties, and transformation of matter. A mechanistic understanding of the pertinent processes is required to translate fundamental knowledge into practical applications. The current development of ultrafast Raman as a powerful time-resolved vibrational technique, particularly femtosecond stimulated Raman spectroscopy (FSRS), has shed light on the structure-energy-function relationships of various photosensitive systems. This Perspective reviews recent work incorporating optical innovations, including the broad-band up-converted multicolor array (BUMA) into a tunable FSRS setup, and demonstrates its resolving power to watch metal speciation and photolysis, leading to high-quality thin films, and fluorescence modulation of chimeric protein biosensors for calcium ion imaging. We discuss advantages of performing FSRS in the mixed time-frequency domain and present strategies to delineate mechanisms by tracking low-frequency modes and systematically modifying chemical structures with specific functional groups. These unique insights at the chemical-bond level have started to enable the rational design and precise control of functional molecular machines in optical, materials, energy, and life sciences.
机译：化学研究物质的组成，结构，性质和转化。对相关过程的机械理解是必需的，将基本知识转化为实际应用。超快拉曼的电流发展作为强大的时间分辨振动技术，特别是飞秒刺激的拉曼光谱（FSRS），对各种光敏系统的结构 - 能量函数关系进行了脱光。此透视审查最近的工作包括光学创新，包括宽带上转换的多色阵列（BUMA）进入可调式FSRS设置，并演示其用于观看金属形态和光解的分辨率，导致高质量的薄膜和荧光钙离子成像的嵌合蛋白生物传感器的调节。我们讨论在混合时频域中执行FSRS的优势，并通过跟踪低频模式并系统地修饰具有特定官能团的化学结构来绘制机制的策略。这些独特的化学粘合水平的见解已经开始实现光学，材料，能量和生命科学中的功能分子机器的合理设计和精确控制。

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