Instrument for natural and magnetic Raman optical activity studies in right‐angle scattering
Instrument for natural and magnetic Raman optical activity studies in right‐angle scattering
复制标题
用于直角散射自然拉曼光学活性和磁性拉曼光学活性研究的仪器
DOI：
10.1002/jrs.1250250703
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发表时间：
1994
影响因子：
2.5
通讯作者：
L. Barron
中科院分区：
文献类型：
--
作者：
L. Hecht;L. Barron
介绍了一种简单的计算机控制的仪器，用于测量自然光和磁场入射圆偏振拉曼旋光（ICP罗阿旋光）的直角散射。关键的光谱元件包括一个快速单级单色仪配备了全息陷波滤波器，一个高效的全息衍射光栅和一个薄的背照式，热电冷却的电荷耦合器件（CCD）检测器。采用温度稳定的纵向电光调制器在入射激光辐射的正交圆偏振态之间切换。偏振片与云母半波延迟板一起用于选择具有相同仪器响应的拉曼散射辐射中的特定线偏振态。本文给出了（R）-（-）和（S）-（+）-苯基环氧乙烷的高质量去极化和极化Stokes和去极化反Stokes ICP罗阿光谱以及四溴化铜（II）的去极化磁共振ICP罗阿光谱作为其优良性能的典型例子。
A simple computer-controlled instrument for natural and magnetic incident circular polarization Raman optical activity (ICP ROA) measurements in right-angle scattering is described. The key spectral elements consist of a fast single-stage monochromator equipped with a holographic notch filter, a highly efficient holographic diffraction grating and a thinned back-illuminated, thermoelectrically cooled charge-coupled device (CCD) detector. A temperature-stabilized longitudinal electro-optic modulator is employed to switch between orthogonal circular polarization states in the incident laser radiation. A polaroid film together with a mica half-wave retardation plate are used to select particular linear polarization states in the Raman scattered radiation with the same instrumental response. High-quality depolarized and polarized Stokes and depolarized anti-Stokes ICP ROA spectra of (R)-(−) and (S)-(+)-phenyloxirane and depolarized magnetic resonance ICP ROA spectra of copper(II) tetrabromide are presented as typical examples of the excellent performane characteristics.