RUI: High Resolution Coherent 3D Spectroscopy

在化学系化学测量和成像项目的支持下，斯佩尔曼学院的陈教授正在与本科生合作，开发和研究斯佩尔曼发明的一种新的激光光谱技术。这种新的三维光谱学方法可以克服其他现有光谱学形式在研究化学中分子的性质和行为方面的问题和局限性。具体来说，在这个项目中，陈教授与他的学生密切合作：1)进一步开发光谱解释的理论和软件；2)展示使用该技术以二氧化氮(NO2)为样本分子的研究；3)将新的光谱技术与高分辨率、相干的二维光谱方法相结合，以提高数据收集和信息提取的速度；以及4)确定可以从该技术增强的能力中受益的其他感兴趣的分子。在美国仅有的两所黑人女子学院之一的斯佩尔曼学院，陈教授实验室里的许多学生都来自少数族裔群体。通过这个项目，他为他们提供了一次激动人心的本科生研究经历，鼓励他们攻读研究生，并为他们做好更好的准备。高分辨分子光谱学是一项成熟的技术，在提供有关分子结构和行为的详细信息方面有很长的记录。然而，许多分子顽固地抵制分析，因为它们产生的光谱太拥挤、太扰动、太复杂、太没有图案。此外，当样品是混合物时，高分辨率分子光谱的分析应用受到难以解释光谱的限制。该项目的目的是开发和探索高分辨率相干三维(HRC3D)光谱学作为克服这些限制的方法的能力。与最近发展起来的具有互补能力的高分辨率相干二维(HRC2D)技术相结合，这两种工具为研究现有方法无法研究的体系中的多原子分子(如NO2)提供了一种替代方法。

With support from the Chemical Measurement and Imaging Program in the Division of Chemistry, Professor Chen at Spelman College is working with undergraduate students to develop and investigate a new laser spectroscopic technique that was invented at Spelman. This new three-dimensional spectroscopy method can overcome problems and limitations of other existing forms of spectroscopy in the study of the properties and behavior of molecules in chemistry. Specifically in this project, Professor Chen works closely with his students to 1) further develop theory and software for spectral interpretation; 2) demonstrate the study of nitrogen dioxide (NO2) as the sample molecule using this technique; 3) combine the new spectroscopic technique with a high resolution, coherent, two dimensional spectroscopic method to improve the speed of data collection and information extraction; and 4) identify other interesting molecules that could benefit from the enhanced capability of this technique. At Spelman College, one of only two Historically Black Colleges for women in the US, many students in Professor Chen's lab are from underrepresented minority groups. With this project, he provides them with a stimulating undergraduate research experience that encourages and better prepares them to pursue graduate school. High resolution molecular spectroscopy is a mature technique with a long record of providing detailed information about molecular structure and behavior. However, many molecules have stubbornly resisted analysis because the spectra they produce are too heavily congested, perturbed, complex, and patternless. Furthermore, analytical applications of high resolution molecular spectroscopy are limited by difficulty in interpreting spectra when the sample is a mixture. The purpose of the project is to develop and explore the capabilities of High Resolution Coherent Three Dimensional (HRC3D) spectroscopy as a method for overcoming these limitations. In conjunction with a recently developed High Resolution Coherent Two Dimensional (HRC2D) technique, which has complimentary capabilities, these two tools provide an alternative method for studying polyatomic molecules (such as NO2) in systems that cannot be studied using existing methods.