Hiramatsu Kotaro, Nagata Takashi
Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan.
J Chem Phys. 2015 Sep 28;143(12):121102. doi: 10.1063/1.4932229.
We report the development of broadband and sensitive time-resolved circular dichroism (TRCD) spectroscopy by exploiting optical heterodyne detection. Using this method, transient CD signals of submillidegree level can be detected over the spectral range of 415-730 nm. We also demonstrate that the broadband measurement with the aid of singular value decomposition enables the discrimination of genuine TRCD signals from artificial optical-anisotropy, such as linear birefringence and linear dichroism, induced by photoexcitation.
我们报道了通过利用光学外差检测技术开发宽带且灵敏的时间分辨圆二色性（TRCD）光谱。使用这种方法，在415 - 730 nm光谱范围内可以检测到亚毫度级别的瞬态CD信号。我们还证明，借助奇异值分解的宽带测量能够从光激发诱导的诸如线性双折射和线性二色性等人工光学各向异性中辨别出真正的TRCD信号。
