Photoionization Study of L-Valine in the Gas Phase by Vacuum Ultraviolet Synchrotron Radiation

2011 ◽  
Vol 17 (2) ◽  
pp. 101-112 ◽  
Author(s):  
Shaohui Zhou ◽  
Genbai Chu ◽  
Lanlan Cao ◽  
Xiaobin Shan ◽  
Fuyi Liu ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Gas Phase ◽  
Vacuum Ultraviolet

scholarly journals Vacuum Ultraviolet Photoionization Study of Gas Phase Vitamins A and B1 Using Aerosol Thermodesorption and Synchrotron Radiation

2014 ◽  
Vol 118 (47) ◽  
pp. 11185-11192 ◽  
Author(s):  
Héloïse Dossmann ◽  
Adrián Schwarzenberg ◽  
Denis Lesage ◽  
Marie Pérot-Taillandier ◽  
Carlos Afonso ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Gas Phase ◽  
Vacuum Ultraviolet

Vacuum ultraviolet photochemistry of sulfuric acid vapor： A combined experimental and theoretical study

2021 ◽  
Author(s):  
Cuihong Zhang ◽  
Xiaoxiao Lin ◽  
Xiaofeng Tang ◽  
Christa Fittschen ◽  
Sebastian Hartweg ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Synchrotron Radiation ◽  
Energy Range ◽  
Gas Phase ◽  
Vacuum Ultraviolet ◽  
Theoretical Study ◽  
Acid Vapor ◽  
Vuv Photoionization

We present a vacuum ultraviolet (VUV) photoionization study of the gas-phase sulfuric acid (H2SO4) molecule in the 11-14 eV energy range by using the method of synchrotron radiation-based double imaging...

scholarly journals Photodesorption of Acetonitrile CH3CN in UV-irradiated Regions of the Interstellar Medium: Experimental Evidence

2021 ◽  
Vol 922 (2) ◽  
pp. 213
Author(s):  
Romain Basalgète ◽  
Antonio Jesus Ocaña ◽  
Géraldine Féraud ◽  
Claire Romanzin ◽  
Laurent Philippe ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Interstellar Medium ◽  
Experimental Evidence ◽  
Gas Phase ◽  
Significant Influence ◽  
Vacuum Ultraviolet ◽  
Organic Molecules ◽  
Protoplanetary Disks ◽  
Desorption Process ◽  
The One

Abstract Pure acetonitrile (CH3CN) and mixed CO:CH3CN and H2O:CH3CN ices have been irradiated at 15 K with vacuum ultraviolet (VUV) photons in the 7–13.6 eV range using synchrotron radiation. VUV photodesorption yields of CH3CN and of photoproducts have been derived as a function of the incident photon energy. The coadsorption of CH3CN with CO and H2O molecules, which are expected to be among the main constituents of interstellar ices, is found to have no significant influence on the VUV photodesorption spectra of CH3CN, CHCN•, HCN, CN•, and CH3•. Contrary to what has generally been evidenced for most of the condensed molecules, these findings point toward a desorption process for which the CH3CN molecule that absorbs the VUV photon is the one desorbing. It can be ejected in the gas phase as intact CH3CN or in the form of its photodissociation fragments. Astrophysical VUV photodesorption yields, applicable to different locations, are derived and can be incorporated into astrochemical modeling. They vary from 0.67(± 0.33) × 10−5 to 2.0(± 1.0) × 10−5 molecule photon−1 for CH3CN depending on the region considered, which is high compared to other organic molecules such as methanol. These results could explain the multiple detections of gas-phase CH3CN in different regions of the interstellar medium and are well correlated to astrophysical observations of the Horsehead nebula and of protoplanetary disks (such as TW Hya and HD 163296).

scholarly journals Kinetics of 1- and 2-methylallyl + O2 reaction, investigated by photoionisation using synchrotron radiation

2021 ◽  
Author(s):  
Domenik Schleier ◽  
Engelbert Reusch ◽  
Marius Gerlach ◽  
Tobias Preitschopf ◽  
Deb Pratim Mukhopadhyay ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Reaction Kinetics ◽  
Molecular Oxygen ◽  
Light Source ◽  
Storage Ring ◽  
Vacuum Ultraviolet ◽  
Flow Tube ◽  
Tube Reactor ◽  
Swiss Light Source ◽  
Kinetics Of

The reaction kinetics of the isomers of the methylallyl radical with molecular oxygen has been studied in a flow tube reactor at the vacuum ultraviolet (VUV) beamline of the Swiss Light Source storage ring.

scholarly journals Gas-phase aluminium acetylacetonate decomposition: Revision of the current mechanism by VUV synchrotron radiation

2021 ◽  
Author(s):  
Sebastian Grimm ◽  
Seung-Jin Baik ◽  
Patrick Hemberger ◽  
Andras Bodi ◽  
Andreas Kempf ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Synchrotron Radiation ◽  
Gas Phase ◽  
Vapor Deposition ◽  
Aluminium Oxide ◽  
Chemical Vapor ◽  
Phase Decomposition ◽  
Common Precursor ◽  
Current Mechanism

Although aluminium acetylacetonate, Al(C5H7O2)3, is a common precursor for chemical vapor deposition (CVD) of aluminium oxide, its gas phase decomposition is not very well investigated. Here, we studied its thermal...

Photofragmentation of gas-phase acetic acid and acetamide clusters in the vacuum ultraviolet region

2017 ◽  
Vol 147 (19) ◽  
pp. 194302 ◽  
Author(s):  
Marta Berholts ◽  
Hanna Myllynen ◽  
Kuno Kooser ◽  
Eero Itälä ◽  
Sari Granroth ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Gas Phase ◽  
Vacuum Ultraviolet ◽  
Ultraviolet Region ◽  
Vacuum Ultraviolet Region
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