Ozonolysis FTIR spectroscopy

Carbon monoxide has been used to scavenge OH fonned from the ozonolysis of alkenes. The CO2 tints generated was detected by FTIR spectroscopy and the "OH yields for individual reactions were calculated.239 The significance of the OH-induced intramolecular transformation of glutathione thiyl radicals to a-aminoalkyl radicals has been discussed with respect to its biological implications.240 The kinetics and mechanism of the process indicated that it could be a significant pathway for the selfremoval of glutathione thiyl radicals in vivo. 

Ozonolysis of VOC recent studies by matrix isolation FTIR spectroscopy, in Pollution Atmospherique, Quatriemes entretiens du Centre Jacques Cartier sur Reactivite Chimique de L Atmosphere et Mesure des Polluants Atmospheriques, Grenoble 1990, Special Issue 33 (1991) 29-44. 

A brief report is presented on studies of the ozonolysis of unsaturated rubbers, e.g. NR and chloroprene rubber, carried out by means of FTIR spectroscopy. 

The mechanisms of ozonolysis of volatile organic compounds such as alkenes and dienes are discussed and the products output is determined by matrix isolation FTIR spectroscopy [18],... 

Polyethylene fibers are subject to ozone treatment for modifying their surface [130], The analysis of the surface is carried out by means of X-ray photoelectron (ESCA) and IR (FTIR) spectroscopy. Carbon (C) and oxygen (0) were the main atoms monitored with ESCA (C-ls, 0-ls areas) on the treated fibers. The analysis of C-ls peaks (Cj, and C3) reveals that the oxidation level depends of the ozonation time. The components of Is peak (Oq, Oj, O2) are very useful for carrying out the surface analysis. They demonstrate the presence of carbonyl groups (1740-1700 cm ) even onto untreated fibers whose intensity rises with treatment time. Ozonolysis... 

The ozonolysis of simple alkenes was studied in two different apparatus a 2 litre stirred tank reactor (for ethene, propene, fran.y-2-butene, butadiene, and isoprene) coupled via molecular beam sampling to a matrix isolation FTIR set-up [20, 21], and a 570 L spherical glass vessel "big sphere" (for ethene, 2-butene isomers, isobutene, and isoprene) where products were identified by Fl lR spectroscopy, GC and a scrubber sampling unit for analysis with HPLC (for peroxides) and IC (for organic acids). In the latter system, two extreme humidity conditions, one with 0.5 ppm and the other with 2 x 10" ppm (corresponding to ca. 60 % relative humidity at 298 K) were used, which are referred to as "dry" and "wet" conditions, respectively. Results of the studies performed in the "big sphere" are summarised here. 

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