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Title: Ultrafast deep-ultraviolet spectroscopy of ionised liquid water
Authors: Ng, Zi Xuan
Perrett, Samuel
Muhammad Shafiq Mohd Yusof
Loh, Zhi-Heng
Keywords: Science::Chemistry
Issue Date: 2020
Source: Ng, Z. X., Perrett, S., Muhammad Shafiq Mohd Yusof, & Loh, Z. H. (2020). Ultrafast deep-ultraviolet spectroscopy of ionised liquid water. Proc. Of the 7th Asian Spectroscopy Conference (ASC 2020). doi:10.32655/ASC_8-10_Dec2020.70
Abstract: The ionisation of liquid water is a phenomenon that accompanies high-energy radiation with biological systems and aqueous solutions. The study of this process is of fundamental importance to radiation biology and radiation chemistry.[1-3] Upon photoionisation, a water radical cation, H2O●+, is produced upon an ejection of an electron which subsequently relaxes into the localized hydrated electron, ehyd-. The H2O●+ radical cation undergoes a proton transfer reaction to yield a hydroxyl radical, ●OH and a hydronium ion, H3O+. Previous studies have measured the timescale of decay of the H2O●+ radical cation to be 46 fs.[4] To build on that discovery, this study focuses on detecting the formation time of the proton transfer product, the ●OH radical, by monitoring its deep-ultraviolet (DUV) absorption. Herein, this study presents the successful generation of ultrashort DUV pulses, and the ultrafast pump-probe spectroscopic measurements of the absorption of the ●OH radical.
DOI: 10.32655/ASC_8-10_Dec2020.70
Rights: © 2020 Nanyang Technological University.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:Asian Spectroscopy Conference

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