Time-dependent yield of the hydrated electron and the hydroxyl radical in D2 O: a picosecond pulse radiolysis study

Physical Chemistry Chemical Physics : PCCP
Furong WangMehran Mostafavi

Abstract

Picosecond pulse radiolysis measurements were performed in neat D2O and H2O in order to study the isotopic effect on the time-resolved yield of the hydrated electron and hydroxyl radical. First, the absorption band of the hydrated electron in D2O, eD2O-, is measured between 250 and 1500 nm. The molar absorption coefficient of the solvated electron spectrum in D2O was determined using the isosbestic point method by scavenging the solvated electron using methyl viologen. The amplitude and shape of the absorption spectrum of the hydrated electron in D2O are different from those previously reported in the literature. The maximum of the hydrated electron in the D2O absorption band is ca. 704 nm with a molar absorption coefficient of (22 900 ± 500) L mol-1 cm-1. Based on this extinction coefficient, the radiolytic yield of eD2O- just after the 7 ps electron pulse was determined to be (4.4 ± 0.2) × 10-7 mol J-1, which coincides with the one for eH2O- in H2O. The time-dependent radiolytic yield of eD2O- was determined from a few ps to 8 ns. To determine the OD˙ radical yield, the contribution of the solvated electron and of the transient species produced by the electron pulse in the windows of the fused silica optical cell was taken in...Continue Reading

References

Oct 4, 2002·Physics in Medicine and Biology·I Kawrakow
Jul 13, 2006·The Journal of Physical Chemistry. a·David M BartelsCharles D Jonah
Feb 16, 1934·Science·G N Lewis
Jan 12, 2010·The Journal of Physical Chemistry. a·Patrick M HareDavid M Bartels
Oct 6, 2011·The Journal of Physical Chemistry. a·Abdel Karim El OmarMehran Mostafavi
Jul 1, 2016·The Journal of Physical Chemistry. B·Fayçal Torche, Jean-Louis Marignier

❮ Previous
Next ❯

Citations

Oct 11, 2019·International Journal of Molecular Sciences·Jun MaMehran Mostafavi
Sep 25, 2020·Medical Physics·José Ramos-MéndezBruce Faddegon
Mar 9, 2021·Physical Chemistry Chemical Physics : PCCP·Sergey A Denisov, Mehran Mostafavi
Jun 15, 2018·The Journal of Physical Chemistry. B·Furong WangMehran Mostafavi
Jul 4, 2021·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Changjiang HuMehran Mostafavi
Aug 20, 2021·Physics in Medicine and Biology·J Ramos-MéndezB Faddegon

❮ Previous
Next ❯

Methods Mentioned

BETA
X-ray
electron scattering
electron beam scattering
electron beam

Software Mentioned

EGSnrc
ELYSE

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.