Study of benzylperoxy radical using laser photolysis: ultraviolet spectrum, self-reaction, and reaction with HO2 kinetics. Export

@article{citeulike:1391754, abstract = {The ultraviolet absorption spectrum of benzylperoxy radical and the kinetics of the reactions 2C(6)H(5)CH(2)O(2) --> products (I) and C(6)H(5)CH(2)O(2) + HO(2) --> products (II) are studied. Experiments are carried out using the laser photolysis technique with time-resolved UV-visible absorption spectroscopy over the temperature range 298-353 K and the pressure range 50-200 Torr. The UV spectrum is determined relative to the known cross section of the ethylperoxy radical C(2)H(5)O(2) at 250 nm. Using factor analysis, the spectrum obtained is refined and the concentrations of the main absorbing species are extracted. The kinetic parameters are determined by analyzing and simulating the temporal profiles of the species concentrations and the experimental optical densities in the spectral region 220-280 nm. These are obtained using the recent UV spectra of the absorbing species existing in our mechanism. The Arrhenius expressions for reactions I and II are (cm(3).molecule(-1).s(-1)) k(I) = 2.50 x 10(-14)e(1562/)(T) and k(II) = 5.70 x 10(-14)e(1649/)(T). Our results are discussed and compared to literature data.}, address = {Laboratoire GSMA, UMR CNRS 6089, Facult\'{e} des Sciences, Universit\'{e} de Reims, Moulin de la Housse, France. gisele.eldib@univ-reims.fr}, author = {El Dib, G. and Chakir, A. and Roth, E. and Brion, J. and Daumont, D.}, citeulike-article-id = {1391754}, citeulike-linkout-0 = {http://dx.doi.org/10.1021/jp056860p}, citeulike-linkout-1 = {http://pubs.acs.org/doi/abs/10.1021/jp056860p}, citeulike-linkout-2 = {http://view.ncbi.nlm.nih.gov/pubmed/16789772}, citeulike-linkout-3 = {http://www.hubmed.org/display.cgi?uids=16789772}, day = {29}, doi = {10.1021/jp056860p}, issn = {1089-5639}, journal = {J Phys Chem A Mol Spectrosc Kinet Environ Gen Theory}, keywords = {gsma}, month = {June}, number = {25}, pages = {7848--7857}, posted-at = {2007-06-15 11:31:21}, priority = {2}, title = {Study of benzylperoxy radical using laser photolysis: ultraviolet spectrum, self-reaction, and reaction with HO2 kinetics.}, url = {http://dx.doi.org/10.1021/jp056860p}, volume = {110}, year = {2006} }

TY - JOUR ID - citeulike:1391754 L3 - citeulike-article-id:1391754 N2 - The ultraviolet absorption spectrum of benzylperoxy radical and the kinetics of the reactions 2C(6)H(5)CH(2)O(2) --> products (I) and C(6)H(5)CH(2)O(2) + HO(2) --> products (II) are studied. Experiments are carried out using the laser photolysis technique with time-resolved UV-visible absorption spectroscopy over the temperature range 298-353 K and the pressure range 50-200 Torr. The UV spectrum is determined relative to the known cross section of the ethylperoxy radical C(2)H(5)O(2) at 250 nm. Using factor analysis, the spectrum obtained is refined and the concentrations of the main absorbing species are extracted. The kinetic parameters are determined by analyzing and simulating the temporal profiles of the species concentrations and the experimental optical densities in the spectral region 220-280 nm. These are obtained using the recent UV spectra of the absorbing species existing in our mechanism. The Arrhenius expressions for reactions I and II are (cm(3).molecule(-1).s(-1)) k(I) = 2.50 x 10(-14)e(1562/)(T) and k(II) = 5.70 x 10(-14)e(1649/)(T). Our results are discussed and compared to literature data. IS - 25 JF - J Phys Chem A Mol Spectrosc Kinet Environ Gen Theory SN - 1089-5639 AD - Laboratoire GSMA, UMR CNRS 6089, Faculté des Sciences, Université de Reims, Moulin de la Housse, France. gisele.eldib@univ-reims.fr EP - 7857 TI - Study of benzylperoxy radical using laser photolysis: ultraviolet spectrum, self-reaction, and reaction with HO2 kinetics. VL - 110 SP - 7848 KW - gsma AU - El Dib, G AU - Chakir, A AU - Roth, E AU - Brion, J AU - Daumont, D PY - 2006/06/29/ UR - http://dx.doi.org/10.1021/jp056860p ER -