Laser Flash Photolysis Studies of Halogen Atom Reactions of Atmospheric Interest PDF Download

Author: Patrick L. Laine
Publisher:
ISBN:
Category : Atmosphere
Languages : en
Pages :

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Author: Jeffrey M. Cronkhite
Publisher:
ISBN:
Category : Oxides
Languages : en
Pages : 242

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Author: Zhijun Zhao
Publisher:
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Category : Dynamics
Languages : en
Pages :

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Book Description
Radical reactions play central roles in regulating regional air quality and global climate. Some potentially important gas phase radical reactions are being investigated in this research project, including Cl reactions with acetone, butanone, 3-pentanone, pyridine, and dimethyl selenide (DMSe), HO2 complex formation and dissociation with formic and acetic acids, and reactive and non-reactive quenching of O(1D) by the potent greenhouse gases SO2F2, NF3, and SF5CF3. The involved radicals are generated by laser flash photolysis (LFP). Temporal profiles of either the radical reactant or a product are monitored in "real time" using atomic resonance fluorescence spectroscopy (RF), time-resolved UV-visible absorption spectroscopy (TRUVVAS), or tunable diode laser absorption spectroscopy (TDLAS), allowing kinetic and mechanistic information of these reactions to be obtained. These studies provide new knowledge of the investigated radical reactions and facilitate a better understanding of their significance in atmospheric chemistry.

Author: Rafal Strekowski
Publisher:
ISBN:
Category : Hydrocyanic acid
Languages : en
Pages : 380

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Author:
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Category :
Languages : en
Pages : 616

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Author:
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Category : Atmospheric chemistry
Languages : en
Pages : 576

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Author: Venus Maria Christina Dookwah-Roberts
Publisher:
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Category : Atmospheric chemistry
Languages : en
Pages :

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A number of weakly bound adducts play important roles in atmospheric chemistry, such as DMS OH and CS2 OH. The work comprising this dissertation involves kinetic and spectroscopic studies of adducts formed between halogen atoms and the important atmospheric trace gases CS2, CH3SCH3 (DMS), CH3I, and C2H5I. The results reported in these studies are useful for developing an understanding of the reactivity of these species and for testing the ability of electronic structure theory and reaction rate theory to predict or rationalize any observed trends. Oxidative pathways of both alkyl halides and sulfur compounds, especially DMS, are of atmospheric interest based on the roles of these species in affecting the oxidizing capacity of the troposphere and in the formation of new particles which impact the Earth s radiation budget and climate variability. The experimental approach employed laser flash photolysis (LFP) coupled with time resolved UV-visible absorption spectroscopy (TRUVVAS) to investigate the spectroscopy and kinetics of the gas phase adducts: SCS Cl, CH3I Cl, C2H5I Cl, (CH3)2S Br, and (CH3)2S I.

Author:
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Category : Power resources
Languages : en
Pages : 1224

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Author:
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Category : Dissertations, Academic
Languages : en
Pages : 680

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Author: A. C. Knipe
Publisher: John Wiley & Sons
ISBN: 0470021152
Category : Science
Languages : en
Pages : 678

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Book Description
Presents and surveys research described in literature between December 1999 and November 2000. As in previous volumes new mechanisms for the synthesis of all types of organic compounds will be included as well as such mechanisms as addition and elimination reactions, nucleophilic and electrophilic aromatic substitutions and molecular arrangements. This annual series on organic reaction mechanisms reasearch provides concise and comprehensive coverage of the years literature as well as discussions on important results. Each volume is extensively referenced to previous volumes and primary journals.