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Abstract
Abstract
Mixtures of O3 with excess N2O were photolysed in the wavelength region 290 - 335 nm using monochromatic light with a band width of 4 nm. The resulting primary product atomic singlet oxygen, O(1D), in reacting with N2O produces in part NO which subsequently reacts with O3 giving rise to a weak infrared chemiluminescence. The emission was monitored with a cooled photomultiplier. The emission intensity is directly proportional to the rate of O(1D) production and it has been utilised to derive the relative O(1D) quantum yield as a function of wavelength between 295 and 320 nm. The data were normalised to a quantum yield of unity of 300 nm and corrections were applied to reduce the error resulting from the spectral band width of photolysing radiation. The O(1D) quantum yields show a temperature dependence. At 298 K the quantum yield is unity up to 305 nm, then declines to zero at 319 nm. At the dissociation limit, taken to occur at γ = 310.3 nm, the quantum yields is 0.57, i. e. considerably below unity. The implications of this result as well as the tail toward longer wavelengths and the temperature dependence are discussed. Ozone absorption cross sections are also reported.
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Affiliation(s)
- G. K. Moortgat
- Max-Planck-Institut für Chemie (Otto-Hahn-Institut), Mainz
| | - P. Warneck
- Max-Planck-Institut für Chemie (Otto-Hahn-Institut), Mainz
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Horie O, Moortgat GK. Photolysis of Ketene-Oxygen Mixtures between 253 K and 323 K in Relation to the Formation of Criegee Intermediates. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19920960332] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Le Person A, Solignac G, Oussar F, Daële V, Mellouki A, Winterhalter R, Moortgat GK. Gas phase reaction of allyl alcohol (2-propen-1-ol) with OH radicals and ozone. Phys Chem Chem Phys 2009; 11:7619-28. [DOI: 10.1039/b905776e] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Magneron I, Mellouki A, Le Bras G, Moortgat GK, Horowitz A, Wirtz K. Photolysis and OH-Initiated Oxidation of Glycolaldehyde under Atmospheric Conditions. J Phys Chem A 2005; 109:4552-61. [PMID: 16833791 DOI: 10.1021/jp044346y] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The photolysis and OH-initiated oxidation of glycolaldehyde (HOCH(2)CHO), which are relevant atmospheric processes, have been investigated under different conditions using complementary methods in three different laboratories. The UV absorption cross sections of glycolaldehyde determined in two of the laboratories are in excellent agreement. The photolysis of glycolaldehyde in air has been investigated in a quartz cell with sunlamps and in the EUPHORE chamber irradiated by sunlight. The mean photolysis rate measured under solar radiation was (1.1 +/- 0.3) x 10(-5) s(-1) corresponding to a mean effective photolysis quantum yield of (1.3 +/- 0.3). The major products detected were HCHO and CO, whereas CH(3)OH was also observed with an initial yield around 10%. Evidence for OH production was found in both experiments using either OH scavenger or OH tracer species. Photolysis of glycolaldehyde was used as the OH source to measure the reaction rate constants of OH with a series of dienes by the relative method and to identify and quantify the oxidation products of the OH-initiated oxidation of 2-propanol. The different experiments suggest that OH is produced by the primary channel: HOCH(2)CHO + hnu --> OH + CH(2)CHO (1). The rate constant of the OH reaction with glycolaldehyde has been measured at 298 K using the relative method: k(glyc) = (1.2 +/- 0.3) x 10(-11) cm(3) molecule(-1) s(-1). The product study of the OH-initiated oxidation of glycolaldehyde in air has been performed using both a FEP bag and the EUPHORE chamber. HCHO was observed to be the major product with a primary yield of around 65%. Glyoxal (CHOCHO) was also observed in EUPHORE with a primary yield of (22 +/- 6)%. This yield corresponds to the branching ratio ( approximately 20%) of the H-atom abstraction channel from the CH(2) group in the OH + HOCH(2)CHO reaction, the major channel ( approximately 80%) being the H-atom abstraction from the carbonyl group. The data obtained in this work, especially the first determination of the photolysis rate of glycolaldehyde under atmospheric conditions, indicate that the OH reaction and photolysis can compete as tropospheric sinks for glycolaldehyde. Since glycolaldehyde is a significant oxidation product of isoprene whereas the photolysis of glycolaldehyde is a significant source of methanol, isoprene might contribute a few percent of the global budget of methanol.
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Affiliation(s)
- I Magneron
- LCSR/CNRS, 1C Avenue de la Recherche Scientifique, F-45071 Orléans-Cedex 02, France
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Simon FG, Burrows JP, Schneider W, Moortgat GK, Crutzen PJ. Study of the reaction chlorine monoxide + methyl peroxide .fwdarw. products at 300 K. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100360a017] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Horowitz A, Crowley JN, Moortgat GK. Temperature Dependence of the Product Branching Ratios of the ClO Self-Reaction in Oxygen. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100097a019] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Finkbeiner M, Crowley JN, Horie O, Mueller R, Moortgat GK, Crutzen PJ. Reaction between HO2 and ClO: Product Formation between 210 and 300 K. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100044a011] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Horowitz A, Von Helden G, Schneider W, Simon FG, Crutzen PJ, Moortgat GK. Ozone generation in the 214-nm photolysis of oxygen at 25.degree.C. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100328a027] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Mellouki A, Poulet G, Le Bras G, Singer R, Burrows JP, Moortgat GK. Discharge flow kinetic study of the reactions of nitrate radical with bromine, bromine monoxide, hydrogen bromide, and hydrogen chloride. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100361a012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Burrows JP, Tyndall GS, Moortgat GK. Absorption spectrum of NO3 and kinetics of the reactions of NO3 with NO2, Cl, and several stable atmospheric species at 298 K. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100268a038] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Burrows JP, Moortgat GK, Tyndall GS, Cox RA, Jenkin ME, Hayman GD, Veyret B. Kinetics and mechanism of the photooxidation of formaldehyde. 2. Molecular modulation studies. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100343a034] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Burrows JP, Griffith DWT, Moortgat GK, Tyndall GS. Matrix isolation Fourier transform infrared study of the products of the reaction between chlorine oxide (ClO) and nitrogen dioxide. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100248a018] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Magneron I, Thévenet R, Mellouki A, Le Bras G, Moortgat GK, Wirtz K. A Study of the Photolysis and OH-initiated Oxidation of Acrolein and trans-Crotonaldehyde. J Phys Chem A 2002. [DOI: 10.1021/jp013413a] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- I. Magneron
- LCSR/CNRS, 1C Avenue de la Recherche Scientifique F-45071 Orléans Cedex 02- France
| | - R. Thévenet
- LCSR/CNRS, 1C Avenue de la Recherche Scientifique F-45071 Orléans Cedex 02- France
| | - A. Mellouki
- LCSR/CNRS, 1C Avenue de la Recherche Scientifique F-45071 Orléans Cedex 02- France
| | - G. Le Bras
- LCSR/CNRS, 1C Avenue de la Recherche Scientifique F-45071 Orléans Cedex 02- France
| | - G. K. Moortgat
- Max-Planck-Institut für Chemie, P.O. Box 3060, D-55020 Mainz, Germany
| | - K. Wirtz
- Fundation CEAM, Parque Tecnologico, E−46980 Paterna (Valencia), Spain
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Tyndall GS, Cox RA, Granier C, Lesclaux R, Moortgat GK, Pilling MJ, Ravishankara AR, Wallington TJ. Atmospheric chemistry of small organic peroxy radicals. ACTA ACUST UNITED AC 2001. [DOI: 10.1029/2000jd900746] [Citation(s) in RCA: 287] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Knight GP, Beiderhase T, Helleis F, Moortgat GK, Crowley JN. Reaction of HO2 with ClO: Flow Tube Studies of Kinetics and Product Formation between 215 and 298 K. J Phys Chem A 2000. [DOI: 10.1021/jp9924631] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- G. P. Knight
- Division of Atmospheric Chemistry, Max-Planck-Institut für Chemie, Postfach 3060, 55020 Mainz, Germany
| | - T. Beiderhase
- Division of Atmospheric Chemistry, Max-Planck-Institut für Chemie, Postfach 3060, 55020 Mainz, Germany
| | - F. Helleis
- Division of Atmospheric Chemistry, Max-Planck-Institut für Chemie, Postfach 3060, 55020 Mainz, Germany
| | - G. K. Moortgat
- Division of Atmospheric Chemistry, Max-Planck-Institut für Chemie, Postfach 3060, 55020 Mainz, Germany
| | - J. N. Crowley
- Division of Atmospheric Chemistry, Max-Planck-Institut für Chemie, Postfach 3060, 55020 Mainz, Germany
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Affiliation(s)
- S. Fickert
- Max-Planck-Institut für Chemistry, Division of Atmospheric Chemistry, Postfach 3060, 55020 Mainz, Germany
| | - F. Helleis
- Max-Planck-Institut für Chemistry, Division of Atmospheric Chemistry, Postfach 3060, 55020 Mainz, Germany
| | - J. W. Adams
- Max-Planck-Institut für Chemistry, Division of Atmospheric Chemistry, Postfach 3060, 55020 Mainz, Germany
| | - G. K. Moortgat
- Max-Planck-Institut für Chemistry, Division of Atmospheric Chemistry, Postfach 3060, 55020 Mainz, Germany
| | - J. N. Crowley
- Max-Planck-Institut für Chemistry, Division of Atmospheric Chemistry, Postfach 3060, 55020 Mainz, Germany
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Crowley JN, Burrows JP, Moortgat GK, Poulet G, Le Bras G. Optical detection of NO3 and NO2 in ?pure? HNO3 vapor, the liquid-phase decomposition of HNO3. INT J CHEM KINET 1993. [DOI: 10.1002/kin.550250910] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Horowitz A, Schuster G, Moortgat GK. The chain mechanism of ozone destruction by CFCl3 in the 214 nm photolysis of its mixtures with oxygen. INT J CHEM KINET 1992. [DOI: 10.1002/kin.550240304] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Crowley JN, Burrows JP, Moortgat GK, Poulet G, LeBras G. Room temperature rate coefficient for the reaction between CH3O2 and NO3. INT J CHEM KINET 1990. [DOI: 10.1002/kin.550220703] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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