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Title: Application of two-dimensional optical spectroscopy: from ultrafast spectral diffusion to Lewis basicity
Authors: Do, Thanh Nhut
Sim, Jamie Hung Ni
Nguyen, Hoang Long
Lu, Yunpeng
Tan, Howe-Siang
Keywords: Science::Chemistry
Issue Date: 2020
Source: Do, T. N., Sim J. H. N., Nguyen H. L., Lu, Y., Tan, H.-S. (2020). Application of two-dimensional optical spectroscopy: from ultrafast spectral diffusion to Lewis basicity. Proc. Of the 7th Asian Spectroscopy Conference (ASC 2020). doi:10.32655/ASC_8-10_Dec2020.48
Abstract: Two-dimensional optical spectroscopy (2DOS) is the optical version of the well-established 2D-NMR technique, e.g., COSY. With time resolution in the femtosecond regime, 2DOS is widely used to resolve the ultrafast frequency modulation dynamics, such as spectral diffusion, in various vibrational [1-2] and electronic [3-4] systems. Chlorophylls (Chls) a and b are two main types of photosynthetic pigments responsible for the light-harvesting and energy regulation of green plants on Earth. Here, we employ 2DOS to track the time evolution of the 2D peakshape (Fig. 1) and resolve the ultrafast spectral diffusion dynamics of the Chl Qy transition in various organic solvents. The obtained results suggest that Chls exhibit three different relaxation dynamics with the timescales of sub-picosecond (sub-ps), several ps and tens to hundreds of ps.
DOI: 10.32655/ASC_8-10_Dec2020.48
Rights: © 2020 Nanyang Technological University.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:Asian Spectroscopy Conference

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