NDLI: Time-resolved radiation chemistry: femtosecond photoelectron spectroscopy of electron attachment and photodissociation dynamics in iodide-nucleobase clusters.

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Time-resolved radiation chemistry: femtosecond photoelectron spectroscopy of electron attachment and photodissociation dynamics in iodide-nucleobase clusters.

Content Provider	Semantic Scholar
Author	Kunin, Alice Neumark, Daniel M.
Copyright Year	2019
Abstract	Iodide-nucleobase (I-·N) clusters studied by time-resolved photoelectron spectroscopy (TRPES) are an opportune model system for examining radiative damage of DNA induced by low-energy electrons. By initiating charge transfer from iodide to the nucleobase and following the dynamics of the resulting transient negative ions (TNIs) with femtosecond time resolution, TRPES provides a novel window into the chemistry triggered by the attachment of low-energy electrons to nucleobases. In this Perspective, we examine and compare the dynamics of electron attachment, autodetachment, and photodissociation in a variety of I-·N clusters, including iodide-uracil (I-·U), iodide-thymine (I-·T), iodide-uracil-water (I-·U·H2O), and iodide-adenine (I-·A), to develop a more unified representation of our understanding of nucleobase TNIs. The experiments probe whether dipole-bound or valence-bound TNIs are formed initially and the subsequent time evolution of these species. We also provide an outlook for forthcoming applications of TRPES to larger iodide-containing complexes to enable the further investigation of microhydration dynamics in nucleobases, as well as electron attachment and photodissociation in more complex nucleic acid constituents.
Starting Page	7239
Ending Page	7255
Page Count	17
File Format	PDF HTM / HTML
DOI	10.1039/c8cp07831a
PubMed reference number	30855623
Journal	Medline
Volume Number	21
Issue Number	14
Alternate Webpage(s)	http://bromine.cchem.berkeley.edu/grppub/fpes62.pdf
Alternate Webpage(s)	https://pubs.rsc.org/en/content/getauthorversionpdf/C8CP07831A
Alternate Webpage(s)	http://www.cchem.berkeley.edu/dmngrp/grppub/fpes62.pdf
Alternate Webpage(s)	https://doi.org/10.1039/c8cp07831a
Journal	Physical chemistry chemical physics : PCCP
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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