Download or read book Laser Flash Photolysis Studies of Some Gas Phase Reactions of Atmospheric Interest written by Zhijun Zhao and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Laser Flash Photolysis Studies of Some Halogen Monoxide Reactions of Atmospheric Interest written by Jeffrey M. Cronkhite and published by . This book was released on 1998 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Flash Photolysis Studies of O 1D2 and OH X2II Reactions of Atmospheric Interest written by Rafal Strekowski and published by . This book was released on 2001 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Flash Photolysis Studies of Halogen Atom Reactions of Atmospheric Interest written by Patrick L. Laine and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spectroscopy and Kinetics of Weakly Bound Gas phase Ddducts of Atmospheric Interest written by Venus Maria Christina Dookwah-Roberts and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book NIST Technical Note written by and published by . This book was released on 198? with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Postdoctoral Research Associateships written by and published by . This book was released on 1981 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AFOSR Chemical Atmospheric Sciences Program Review written by United States. Air Force. Directorate of Chemical and Atmospheric Sciences and published by . This book was released on 1975 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Studies of Gas Phase Chemical Reactions written by Emily L. Moore and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Studies of Gas Phase Radical Reactions written by and published by . This book was released on 1989 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of measurements on free radicals produced by chemical reaction and photodissociation has been made, using laser methods for formation and in some cases, detection. Highly exothermic reactions between oxygen atoms and both CF2 and CHF radicals have been studied by time resolved Fourier transform infrared emission spectroscopy, yielding information on the reaction pathway, emitting products, kinetics of formation and quenching, and the nascent vibrational distributions. Emitting species hydrogen chloride, hydrogen fluoride, carbon monoxide, and carbon dioxide have been identified in these systems. In a second study, the quantum state distributions and polarisations of OH and OD(A2sigma+) products of the two photon dissociation of H2O and D2O at 266 nm have been measured. Results show the importance of long lived trajectories in determining the photodissociation dynamics, but the unexpected observation of low fragment alignment is unable to clarify the two photon state responsible for the excitation step. A third project has concentrated on measurements of radiative lifetimes of the CF(A2 sigma +) state, with new information on the A-X spectroscopy and on the O + CF(X2II) reaction rate constant found. Finally, preliminary measurements on the nascent CO rational distribution in the O + CS reaction is reported, and some additional experiments concerning the formation of carbene radicals in liquid phase enzyme cleavage studies are described. Carbon difluoride, Water, Deuterium. (MJM).
Download or read book Kinetic Studies of Gaseous Halogen Oxide Radical Reactions Implicated in Ozone Depletion written by and published by . This book was released on 2012 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Some Fast Reactions in Gases Studied by Flash Photolysis and Kinetic Spectroscopy written by Ronald George Wreyford Norrish and published by . This book was released on 1968 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Studies of Gas Phase Radical Reactions written by G. Hancock and published by . This book was released on 1987 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: (1) CF Chemistry: Radiative lifetimes of the carbon fluoride ion has been measured, with values of 26.7 and 26. Ins obtained respectively. This is the first time that such direct measurements have been reported, and the work is now being prepared for submission to Chemical Physics Letters. (2) O + CF and O + CF2 reactions: Interferograms of IR emission accompanying the O + CF2 reaction have been recorded as a function of time, and thus the complete two dimensional (time and wavelength) mapping of the products of the reaction have been emerged. Figure 1 shows a time history of the complete IR emission (all wavelengths) following the photolysis of CF2HCl (to produce CF2 radicals) in a flow of atomic oxygen.
Download or read book Studies in gas phase unimolecular rate theory and flash photolysis of certain metal alkyls written by Michael Christianson and published by . This book was released on 1974 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Photochemistry written by Angelo Albini and published by Royal Society of Chemistry. This book was released on 2019-09-27 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drawing on the continued wealth of photochemical research, this volume combines reviews on the latest advances in the field with specific topical highlights. Starting with periodical reports of the recent literature on physical and inorganic aspects, light induced reactions in cryogenic matrices, properties of transition-metal compounds, time-resolved spectroscopy, the exploitation of solar energy and the molecules of colour. Coverage continues with highlighted topics, in the second part, from photoresponsive hydrogels, the tunable photoredox properties of organic dyes, light-driven asymmetric organocatalytic processes, dual gold–photoredox catalysis, the preparation and characterization of photosensitizers for triplet–triplet annihilation photon upconversion and the role of photochemistry on traditional synthetic processes. This volume will include for the first time a section entitled ‘SPR Lectures on Photochemistry’, providing examples for academic readers to introduce a photochemistry topic and precious help for students in photochemistry. Providing critical analysis of the topics, this book is essential reading for anyone wanting to keep up to date with the literature on photochemistry and its applications.
Download or read book NBS Special Publication written by and published by . This book was released on 1979 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1990 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
