Photochemical processes in doped argon-neon core-shell clusters: the effect of cage size on the dissociation of molecular oxygen

The Journal of Chemical Physics
T LaarmannT Möller

Abstract

The caging effect of the host environment on photochemical reactions of molecular oxygen is investigated using monochromatic synchrotron radiation and spectrally resolved fluorescence. Oxygen doped clusters are formed by coexpansion of argon and oxygen, by pickup of molecular oxygen or by multiple pickup of argon and oxygen by neon clusters. Sequential pickup provides radially ordered core-shell structures in which a central oxygen molecule is surrounded by argon layers of variable thickness inside large neon clusters. Pure argon and core-shell argon-neon clusters excited with approximately 12 eV monochromatic synchrotron radiation show strong fluorescence in the vacuum ultraviolet (vuv) spectral range. When the clusters are doped with O2, fluorescence in the visible (vis) spectral range is observed and the vuv radiation is found to be quenched. Energy-resolved vis fluorescence spectra show the 2 1Sigma+-->1 1Sigma+(ArO(1S)-->ArO(1D)) transition from argon oxide as well as the vibrational progression A '3Delta u(nu'=0)-->X 3Sigmag*(nu") of O2 indicating that molecular oxygen dissociates and occasionally recombines depending on the experimental conditions. Both the emission from ArO and O2 as well the vuv quenching by oxygen are...Continue Reading

References

Apr 13, 1992·Physical Review Letters·M LengenT Möller
Dec 29, 2000·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·M S GudipatiR Wagner
Feb 19, 2002·Chemical Reviews·V. A. Apkarian, N. Schwentner
Jul 21, 2004·The Journal of Chemical Physics·N Hendrik NahlerR Benny Gerber
Jul 23, 2004·The Journal of Chemical Physics·A KanaevT Moller
Jan 11, 2005·The Journal of Chemical Physics·Annemieke PetrignaniMats Larsson
Feb 14, 2006·Physical Chemistry Chemical Physics : PCCP·Shengfu YangAndrew M Ellis
Apr 25, 2006·Physical Chemistry Chemical Physics : PCCP·A LindbladO Björneholm
Feb 9, 2007·Physical Chemistry Chemical Physics : PCCP·M GührN Schwentner
Sep 11, 2007·The Journal of Chemical Physics·Vadim MozhayskiyAndrey F Vilesov

❮ Previous
Next ❯

Citations

Oct 30, 2014·The Journal of Physical Chemistry. a·Roman E BoltnevDavid M Lee
May 25, 2011·The Journal of Physical Chemistry. a·Elena V SavchenkoVladimir E Bondybey
Dec 1, 2010·Physical Chemistry Chemical Physics : PCCP·F Marinetti, F A Gianturco

❮ Previous
Next ❯

Methods Mentioned

BETA
energy-resolved fluorescence spectroscopy

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.