scholarly journals Photodissociation dynamics of the simplest alkyl peroxy radicals, CH3OO and C2H5OO, at 248 nm

2018 ◽  
Vol 148 (4) ◽  
pp. 044309 ◽  
Author(s):  
Erin N. Sullivan ◽  
Bethan Nichols ◽  
Daniel M. Neumark
Keyword(s):  
Peroxy Radicals ◽  
Alkyl Peroxy Radicals

Reactions of alkoxy and alkyl peroxy radicals

1987 ◽  
Vol 6 (1) ◽  
pp. 53-90 ◽  
Author(s):  
L. Batt
Keyword(s):  
Peroxy Radicals ◽  
Alkyl Peroxy Radicals

Generation and detection of alkyl peroxy radicals in a supersonic jet expansion

2006 ◽  
Vol 125 (1) ◽  
pp. 014310 ◽  
Author(s):  
H. B. Fu ◽  
Y. J. Hu ◽  
E. R. Bernstein
Keyword(s):  
Supersonic Jet ◽  
Peroxy Radicals ◽  
Alkyl Peroxy Radicals ◽  
Supersonic Jet Expansion

Calculated Hydrogen Shift Rate Constants in Substituted Alkyl Peroxy Radicals

2018 ◽  
Vol 122 (43) ◽  
pp. 8665-8673 ◽  
Author(s):  
Rasmus V. Otkjær ◽  
Helene H. Jakobsen ◽  
Camilla Mia Tram ◽  
Henrik G. Kjaergaard
Keyword(s):  
Rate Constants ◽  
Peroxy Radicals ◽  
Hydrogen Shift ◽  
Alkyl Peroxy Radicals

Modeling the Organic Nitrate Yields in the Reaction of Alkyl Peroxy Radicals with Nitric Oxide. 2. Reaction Simulations

2003 ◽  
Vol 107 (38) ◽  
pp. 7434-7444 ◽  
Author(s):  
John R. Barker ◽  
Lawrence L. Lohr ◽  
Robert M. Shroll ◽  
Susan Reading
Keyword(s):  
Nitric Oxide ◽  
Organic Nitrate ◽  
Peroxy Radicals ◽  
Alkyl Peroxy Radicals

Formation of alkyl nitrates from the reaction of branched and cyclic alkyl peroxy radicals with NO

1984 ◽  
Vol 16 (9) ◽  
pp. 1085-1101 ◽  
Author(s):  
Roger Atkinson ◽  
Sara M. Aschmann ◽  
William P. L. Carter ◽  
Arthur M. Winer ◽  
James N. Pitts
Keyword(s):  
Peroxy Radicals ◽  
Alkyl Nitrates ◽  
Alkyl Peroxy Radicals

scholarly journals Secondary organic aerosol yields of 12-carbon alkanes

2013 ◽  
Vol 13 (8) ◽  
pp. 20677-20727 ◽  
Author(s):  
C. L. Loza ◽  
J. S. Craven ◽  
L. D. Yee ◽  
M. M. Coggon ◽  
R. H. Schwantes ◽  
...  
Keyword(s):  
Vapor Phase ◽  
Secondary Organic Aerosol ◽  
Organic Aerosol ◽  
Peroxy Radicals ◽  
Branch Points ◽  
Wall Losses ◽  
Alkyl Peroxy Radicals ◽  
Wall Loss ◽  
Yield Uncertainty ◽  
Modeling Study

Abstract. Secondary organic aerosol (SOA) yields were measured for cyclododecane, hexylcyclohexane, n-dodecane, and 2-methylundecane under high- and low-NOx conditions, in which alkyl peroxy radicals (RO2) react primarily with NO and HO2, respectively, for multiple initial alkane concentrations. Experiments were run until 95–100% of the initial alkane had reacted. Particle wall loss was evaluated as two limiting cases. SOA yield differed by 2 orders of magnitude between the two limiting cases, but the same trends among alkane precursors were observed for both limiting cases. Vapor-phase wall losses were addressed through a modeling study and increased SOA yield uncertainty by approximately 30%. SOA yields were highest from cyclododecane under both NOx conditions. Under high-NOx conditions, SOA yields increased from 2-methylundecane < dodecane ~ hexylcyclohexane < cyclododecane, consistent with previous studies. Under low-NOx conditions, SOA yields increased from 2-methylundecane ~ dodecane < hexylcyclohexane < cyclododecane. The presence of cyclization in the parent alkane structure increased SOA yields, whereas the presence of branch points decreased SOA yields due to increased vapor-phase fragmentation. Vapor-phase fragmentation was found to be more prevalent under high-NOx conditions than under low-NOx conditions. For different initial concentrations of the same alkane and same NOx conditions, SOA yield did not correlate with SOA mass throughout SOA growth, suggesting kinetically limited SOA growth for these systems.

scholarly journals α-pinene photooxidation under controlled chemical conditions – Part 1: Gas-phase composition in low- and high-NO<sub>x</sub> environments

2012 ◽  
Vol 12 (14) ◽  
pp. 6489-6504 ◽  
Author(s):  
N. C. Eddingsaas ◽  
C. L. Loza ◽  
L. D. Yee ◽  
J. H. Seinfeld ◽  
P. O. Wennberg
Keyword(s):  
Gas Phase ◽  
Carboxylic Acids ◽  
First Generation ◽  
Peroxy Radical ◽  
Organic Aerosol ◽  
Oxidation Products ◽  
Peroxy Radicals ◽  
Alkoxy Radical ◽  
Alkyl Peroxy Radicals ◽  
Chemical Conditions

Abstract. The OH oxidation of α-pinene under both low- and high-NOx environments was studied in the Caltech atmospheric chambers. Ozone was kept low to ensure OH was the oxidant. The initial α-pinene concentration was 20–50 ppb to ensure that the dominant peroxy radical pathway under low-NOx conditions is reaction with HO2, produced from reaction of OH with H2O2, and under high-NOx conditions, reactions with NO. Here we present the gas-phase results observed. Under low-NOx conditions the main first generation oxidation products are a number of α-pinene hydroxy hydroperoxides and pinonaldehyde, accounting for over 40% of the yield. In all, 65–75% of the carbon can be accounted for in the gas phase; this excludes first-generation products that enter the particle phase. We suggest that pinonaldehyde forms from RO2 + HO2 through an alkoxy radical channel that regenerates OH, a mechanism typically associated with acyl peroxy radicals, not alkyl peroxy radicals. The OH oxidation and photolysis of α-pinene hydroxy hydroperoxides leads to further production of pinonaldehyde, resulting in total pinonaldehyde yield from low-NOx OH oxidation of ~33%. The low-NOx OH oxidation of pinonaldehyde produces a number of carboxylic acids and peroxyacids known to be important secondary organic aerosol components. Under high-NOx conditions, pinonaldehyde was also found to be the major first-generation OH oxidation product. The high-NOx OH oxidation of pinonaldehyde did not produce carboxylic acids and peroxyacids. A number of organonitrates and peroxyacyl nitrates are observed and identified from α-pinene and pinonaldehyde.

Comparative DFT study of non-fluorinated and perfluorinated alkyl and alkyl-peroxy radicals

2005 ◽  
Vol 402 (4-6) ◽  
pp. 485-490 ◽  
Author(s):  
Svetlin Mitov ◽  
Alexander Panchenko ◽  
Emil Roduner
Keyword(s):  
Dft Study ◽  
Peroxy Radicals ◽  
Alkyl Peroxy Radicals

ChemInform Abstract: FORMATION OF ALKYL NITRATES FROM THE REACTION OF BRANCHED AND CYCLIC ALKYL PEROXY RADICALS WITH NITRIC OXIDE

1984 ◽  
Vol 15 (51) ◽  
Author(s):  
R. ATKINSON ◽  
S. M. ASCHMANN ◽  
W. P. L. CARTER ◽  
A. M. WINER ◽  
J. N. JUN. PITTS
Keyword(s):  
Nitric Oxide ◽  
Peroxy Radicals ◽  
Alkyl Nitrates ◽  
Alkyl Peroxy Radicals
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