Peroxyl Radical Clocks

2006 ◽  
Vol 71 (9) ◽  
pp. 3527-3532 ◽  
Author(s):  
Bill Roschek ◽  
Keri A. Tallman ◽  
Christopher L. Rector ◽  
Jason G. Gillmore ◽  
Derek A. Pratt ◽  
...  
Keyword(s):  
Peroxyl Radical ◽  
Radical Clocks

Peroxyesters As Precursors to Peroxyl Radical Clocks

2011 ◽  
Vol 77 (1) ◽  
pp. 276-284 ◽  
Author(s):  
Jason J. Hanthorn ◽  
Derek A. Pratt
Keyword(s):  
Peroxyl Radical ◽  
Radical Clocks

Isomerization of the Isoprene Hydroxy Nitrates and Formation of Orthonitrite Compounds

2019 ◽  
Author(s):  
Gabriel da Silva
Keyword(s):  
Hydroxy Group ◽  
Peroxyl Radical ◽  
Branching Fractions ◽  
Membered Ring ◽  
Low Energy ◽  
Peroxyl Radicals ◽  
Aerosol Formation ◽  
Subsequent Removal ◽  
Ring Compounds ◽  
Group Migration

Atmospheric oxidation of isoprene produces significant yields of eight unique nitrate 11 compounds, each with a β- or δ-hydroxy group. These isoprene hydroxy nitrates (ISOPNs) 12 significantly impact upon global NOx budgets, O3 levels, and aerosol formation. 13 Uncertainties exist, however, in our understanding of ISOPN chemistry, particularly in their 14 yields from the reaction of isoprene peroxyl radicals with NO. This study describes novel 15 isomerization reactions of the ISOPNs, identified through the application of computational 16 chemistry techniques. These reactions produce saturated polycyclic orthonitrite compounds 17 via attack of the R–NO2 group on the vinyl moiety. For the δ-hydroxy nitrates, low-energy 18 isomerization pathways exist to six-membered ring compounds that are around 5 kcal mol-1 19 exothermic. These reactions proceed with barriers around 15 kcal mol-1 below the 20 respective peroxyl radical + NO reactants and yield orthonitrites that can further isomerize 21 to β-hydroxy ISOPNs. Moreover, the δ-hydroxy nitrates can directly interconvert with their β 22 substituted counterparts via NO3 group migration, with barriers that are lower yet. It follows 23 that β-hydroxy nitrates may be stabilized in the δ-hydroxy form, and vice versa. Moreover, 24 the lowest-energy pathway for dissociation of the δ-hydroxy ISOPNs is for the formation of 25 β-hydroxy alkoxyl radicals, and because of this established branching fractions between the 26 various isoprene peroxyl radicals may require re-evaluation. The results presented here also 27 suggest that ISOPNs may be stabilized to some extent in their saturated orthonitrite forms, 28 which has implications for both the total nitrate yield and for their subsequent removal by 29 OH, O3, and photolysis.<br><br>

Kinetic EPR-Studies of the Anti-Peroxyl Radical Reactivities with Various Metallochelates of 3,5-Di-Iso-Propylsalicyalte and Salicylidene Schiff Base

2020 ◽  
Vol 51 (9-10) ◽  
pp. 1049-1069
Author(s):  
Levon A. Tavadyan ◽  
Makich V. Musaelyan ◽  
Armine B. Stepanyan ◽  
Seyran H. Minasyan
Keyword(s):  
Schiff Base ◽  
Peroxyl Radical

Peroxyl Radical-Mediated Hemolysis: Role of Lipid, Protein and Sulfhydryl Oxidation

1992 ◽  
Vol 16 (2) ◽  
pp. 111-122 ◽  
Author(s):  
Iqbal S. Sandhu ◽  
Karen Ware ◽  
Matthew B. Grisham
Keyword(s):  
Peroxyl Radical ◽  
Sulfhydryl Oxidation

scholarly journals Simple determination of peroxyl radical-trapping capacity

IUBMB Life ◽  
1998 ◽  
Vol 46 (3) ◽  
pp. 519-528 ◽  
Author(s):  
Grzegorz Bartosz ◽  
Anna Janaszewska ◽  
Danuta Ertel ◽  
Maŀgorzata Bartosz
Keyword(s):  
Peroxyl Radical ◽  
Radical Trapping

Pathways of Arachidonic Acid Peroxyl Radical Reactions and Product Formation with Guanine Radicals

2008 ◽  
Vol 21 (2) ◽  
pp. 358-373 ◽  
Author(s):  
Conor Crean ◽  
Nicholas E. Geacintov ◽  
Vladimir Shafirovich
Keyword(s):  
Arachidonic Acid ◽  
Peroxyl Radical ◽  
Product Formation ◽  
Radical Reactions

Reduced Plasma Peroxyl Radical Trapping Capacity and Increased Susceptibility of LDL to Oxidation In Poorly Controlled IDDM

Diabetes ◽  
1994 ◽  
Vol 43 (8) ◽  
pp. 1010-1014 ◽  
Author(s):  
Elaine C Tsai ◽  
Irl B Hirsch ◽  
John D Brunzell ◽  
Alan Chait
Keyword(s):  
Peroxyl Radical ◽  
Radical Trapping ◽  
Increased Susceptibility
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