用于分子振动结构采集的拉曼光谱仪器

J. Lazaro, J. D. dela Cruz, J. Villaverde
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引用次数: 1

摘要

确定有机化合物的结构主要是根据其物理和化学性质,因为分子很小,所以很难确定化合物的分子结构。在本研究中,通过仪器和控制开发了一种简单的光谱仪,用于采集分子振动并确定样品的拉曼波数移位。由于在拉曼光谱下可以研究分子键的振动现象,因此在仪器中使用了电荷耦合器件(CCD)和1000线/mm的衍射光栅。利用电荷耦合器件(CCD)阵列构建的光谱仪能够探测紫外线、可见光和近红外光谱。在近红外区域,样品的识别标记用描述红外光谱中的光波长和峰的能谱密度记录。利用在水中进行的酿酒酵母反应,对能量谱密度进行了监测,结果表明,在反应过程中,给定样品吸收了81.52%的光,波数为605.75cm-1,表明在振动谱下的指纹区发生了分子振动。在拉曼波数为623.14cm-1时,当酿酒酵母停止在水中产生8.39%的二氧化碳,但仍有微量化合物时,其对光的吸收变弱。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Instrumentation of Raman Spectrometry for Acquisition of Molecular Vibration Structure
Determining the structure of an organic compound are mainly based on the physical and chemical properties, because molecules are so small it is so hard to determine the molecular structure of a compound. In this study, a simple spectrometer is developed through instrumentation and control to perform acquisition of the molecular vibrations and determine the Raman shift in wavenumber of a sample. Because the vibration phenomenon of a molecular bond can be investigated under the Raman spectrum, a charged coupled device (CCD) was used in the instrumentation together with a diffraction grating of 1000lines/mm. The spectrometer built using a charged coupled device (CCD) array is capable of detecting ultra-violet, visible, and near-infrared spectrum. In the near-infrared region the identifying marks of the samples is recorded with energy spectral density that describes the optical wavelength and peaks in the IR spectrum. Using the reaction in the saccharomyces cerevisiae in water, the energy spectral density is monitored and shows that 81.52% of light is absorbed by the given sample during the reaction with wavenumber of 605.75cm-1 which suggest that the molecular vibration is occurring at the fingerprint region under the vibrational spectrum, and light absorption becomes weaker as saccharomyces cerevisiae stop producing carbon dioxide in water with 8.39% but with traces of chemical compounds at 623.14cm-1 Raman shift in wavenumber.
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