West Brantley A, Moran Andrew M
†Department of Physics and Astronomy and ‡Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States.
J Phys Chem Lett. 2012 Sep 20;3(18):2575-81. doi: 10.1021/jz301048n. Epub 2012 Aug 31.
Coherent two-dimensional (2D) spectroscopies conducted at visible and infrared wavelengths are having a transformative impact on the understanding of numerous processes in condensed phases. The extension of 2D spectroscopy to the ultraviolet spectral range (2DUV) must contend with several challenges, including the attainment of adequate laser bandwidth, interferometric phase stability, and the suppression of undesired nonlinearities in the sample medium. Solutions to these problems are motivated by the study of a wide range of biological systems whose lowest-frequency electronic resonances are found in the UV. The development of 2DUV spectroscopy also makes possible the attainment of new insights into elementary chemical reaction dynamics (e.g., electrocyclic ring opening in cycloalkenes). Substantial progress has been made in both the implementation and application of 2DUV spectroscopy in the past several years. In this Perspective, we discuss 2DUV methodology, review recent applications, and speculate on what the future will hold.
在可见光和红外波长下进行的相干二维（2D）光谱学，正在对凝聚相中众多过程的理解产生变革性影响。将二维光谱学扩展到紫外光谱范围（2DUV）必须应对几个挑战，包括获得足够的激光带宽、干涉相稳定性以及抑制样品介质中不期望的非线性。对广泛生物系统的研究推动了解决这些问题，这些生物系统的最低频率电子共振出现在紫外区域。二维紫外光谱学的发展也使得对基本化学反应动力学（例如环烯烃的电环化开环）获得新的见解成为可能。在过去几年中，二维紫外光谱学的实施和应用都取得了实质性进展。在这篇展望文章中，我们讨论二维紫外光谱学方法，回顾近期的应用，并推测未来的发展。
