Composition of reaction intermediates for stoichiometric and fuel-rich dimethyl ether flames: flame-sampling mass spectrometry and modeling studies

2009 ◽  
Vol 11 (9) ◽  
pp. 1328 ◽  
Author(s):  
Juan Wang ◽  
Marcos Chaos ◽  
Bin Yang ◽  
Terrill A. Cool ◽  
Fred L. Dryer ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Dimethyl Ether ◽  
Reaction Intermediates ◽  
Modeling Studies

Photoionization mass spectrometry and modeling studies of the chemistry of fuel-rich dimethyl ether flames

2007 ◽  
Vol 31 (1) ◽  
pp. 285-293 ◽  
Author(s):  
Terrill A. Cool ◽  
Juan Wang ◽  
Nils Hansen ◽  
Phillip R. Westmoreland ◽  
Fredrick L. Dryer ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Dimethyl Ether ◽  
Photoionization Mass Spectrometry ◽  
Modeling Studies

FREE RADICALS BY MASS SPECTROMETRY: XXII. PRIMARY DECOMPOSITION STEPS IN THE MERCURY-PHOTOSENSITIZED DECOMPOSITION OF METHANOL AND DIMETHYL ETHER

1961 ◽  
Vol 39 (1) ◽  
pp. 102-109 ◽  
Author(s):  
R. F. Pottie ◽  
A. G. Harrison, ◽  
F. P. Lossing
Keyword(s):  
Mass Spectrometry ◽  
Free Radicals ◽  
Dimethyl Ether ◽  
Excited Molecule ◽  
Primary Decomposition ◽  
Oh Radicals ◽  
No Formation ◽  
Abstraction Reaction ◽  
Reaction Proceeds ◽  
Low Pressures

The Hg 3P1 photosensitized decomposition of methanol at low pressures proceeds mainly by a dissociation into CH3O radicals and H atoms. No formation of CH2OH radicals is observed. A subsidiary reaction to form CH3 and OH may also be a primary step. Formation of CH2OH radicals at higher pressures is attributed to an abstraction reaction of CH3O with CH3OH.Two primary modes of dissociation are found to occur for dimethyl ether:[Formula: see text]The relative probabilities of occurrence at low pressures are ∼45% and ∼50%, respectively. The possibility that the second reaction proceeds by formation of an excited molecule is discussed.

scholarly journals Novel C-Xylosylflavones from the Leaves and Flowers of Iris gracilipes

2015 ◽  
Vol 10 (3) ◽  
pp. 1934578X1501000 ◽  
Author(s):  
Takayuki Mizuno ◽  
Tsunashi Kamo ◽  
Nobuhiro Sasaki ◽  
Hiroshi Yada ◽  
Yoshinori Murai ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
Dimethyl Ether

Two new C-glycosylflavones, apigenin 7,4′-dimethyl ether 6- C- β-[(4″′-acetyl-L-rhamnopyranosyl)-(1→2)-xylopyranoside] (1) and apigenin 7,4′-dimethyl ether 6- C- β-L-rhamnopyranosyl-(1→2)-xylopyranoside (2) were isolated from the leaves of Iris gracilipes (Iridaceae), along with two known flavonoids, swertiajaponin (3) and swertisin (4). C-Xylosylflavones 1 and 2 were elucidated by UV and NMR spectroscopy, mass spectrometry, and acid and alkaline hydrolyses. These novel compounds were also presented in the flowers.

scholarly journals Identifying reactive intermediates by mass spectrometry

2020 ◽  
Vol 11 (44) ◽  
pp. 11960-11972
Author(s):  
Jaya Mehara ◽  
Jana Roithová
Keyword(s):  
Mass Spectrometry ◽  
Reactive Intermediates ◽  
Reaction Intermediates ◽  
Insight Into ◽  
Structure Properties

Modern approaches of mass spectrometry can identify reaction intermediates and provide a unique insight into their structure, properties and kinetics.

Isomer-Specific Influences on the Composition of Reaction Intermediates in Dimethyl Ether/Propene and Ethanol/Propene Flame†

2008 ◽  
Vol 112 (39) ◽  
pp. 9255-9265 ◽  
Author(s):  
Juan Wang ◽  
Ulf Struckmeier ◽  
Bin Yang ◽  
Terrill A. Cool ◽  
Patrick Osswald ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Reaction Intermediates
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