Department of Chemistry and ‡Argonne-Northwestern Solar Energy Research Center, Northwestern University , Evanston, Illinois 60208-3113, United States.
Anal Chem. 2017 Jul 5;89(13):6931-6935. doi: 10.1021/acs.analchem.7b01335. Epub 2017 Jun 15.
Femtosecond stimulated Raman spectroscopy (FSRS) is a vibrational spectroscopy technique that has been used in a wide variety of applications: from transient vibrational signature tracking to amplifying weak normal Raman scattering signals. Presented here is an application of FSRS to quantify the differential Raman scattering cross sections (DRSCs) of glucose. In using FSRS to determine the DRSCs of multiple glucose vibrational modes, we demonstrate the applicability of both stimulated Raman loss (SRL) spectroscopy and stimulated Raman gain (SRG) FSRS. Using the two analogous FSRS techniques, SRG and SRL, we determine that the DRSCs of glucose excited at 514.5 nm range from a low of 5.0 ± 1.1 × 10 to a high of 8.9 ± 0.9 × 10 cm molecule sr. This work establishes both the compatibility of SRL for measuring DRSCs and values for the DRSC of multiple vibrational modes of glucose.
飞秒受激拉曼光谱（FSRS）是一种振动光谱技术，已广泛应用于瞬态振动特征跟踪到增强弱的普通拉曼散射信号等各种应用中。这里介绍的是 FSRS 在量化葡萄糖的差示拉曼散射截面（DRSC）中的应用。在使用 FSRS 确定多个葡萄糖振动模式的 DRSC 时，我们展示了受激拉曼损耗（SRL）光谱和受激拉曼增益（SRG）FSRS 的适用性。通过使用两种类似的 FSRS 技术，SRG 和 SRL，我们确定在 514.5nm 激发的葡萄糖的 DRSC 范围从低的 5.0±1.1×10 到高的 8.9±0.9×10cm 分子 sr。这项工作既确立了 SRL 用于测量 DRSC 的兼容性，又确立了葡萄糖多个振动模式的 DRSC 值。
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