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https://hdl.handle.net/10356/155542
Title: | Ultrafast vibrational wave packet dynamics of the aqueous tyrosyl radical anion induced by photodetachment | Authors: | Muhammad Shafiq Mohd Yusof Lim, Yong Liang Loh, Zhi-Heng |
Keywords: | Science::Chemistry | Issue Date: | 2021 | Source: | Muhammad Shafiq Mohd Yusof, Lim, Y. L. & Loh, Z. (2021). Ultrafast vibrational wave packet dynamics of the aqueous tyrosyl radical anion induced by photodetachment. Physical Chemistry Chemical Physics, 23(34), 18525-18534. https://dx.doi.org/10.1039/d1cp02975d | Project: | RG1/20 RG105/17 MOE2014-T2-2-052 |
Journal: | Physical Chemistry Chemical Physics | Abstract: | The ultrafast dynamics triggered by the photodetachment of the tyrosinate dianion in aqueous environment shed light on the elementary processes that accompany the interaction of ionizing radiation with biological matter. Photodetachment of the tryosinate dianion yields the tyrosyl radical anion, an important intermediate in biological redox reactions, although the study of its ultrafast dynamics is limited. Here, we utilize femtosecond optical pump-probe spectroscopy to investigate the ultrafast structural reorganization dynamics that follow the photodetachment of the tyrosinate dianion in aqueous solution. Photodetachment of the tyrosinate dianion leads to vibrational wave packet motion along seven vibrational modes that are coupled to the photodetachment process. The vibrational modes are assigned with the aid of density functional theory (DFT) calculations. Our results offer a glimpse of the elementary dynamics of ionized biomolecules and suggest the possibility of extending this approach to investigate the ionization-induced structural rearrangement of other aromatic amino acids and larger biomolecules. | URI: | https://hdl.handle.net/10356/155542 | ISSN: | 1463-9076 | DOI: | 10.1039/d1cp02975d | Schools: | School of Physical and Mathematical Sciences | Rights: | © 2021 The Owner Societies. All rights reserved. This paper was published by Royal Society of Chemistry in Physical Chemistry Chemical Physics and is made available with permission of The Owner Societies. | Fulltext Permission: | open | Fulltext Availability: | With Fulltext |
Appears in Collections: | SPMS Journal Articles |
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2021_PhysChemChemPhys.pdf | 1.5 MB | Adobe PDF | View/Open |
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