Download or read book Laser Optogalvanic Spectroscopy and Laser induced Chemical Kinetics Studies Pertaining to the Methoxy Radical written by Abdullahi H. Nur and published by . This book was released on 1994 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Spectroscopy and Chemical Kinetics Investigations of the Methoxy Radical written by Michael Edward King and published by . This book was released on 1996 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Kinetics and Mechanism of Combustion Related Reactions of Methoxy Radicals written by W. A. Sanders and published by . This book was released on 1983 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reactions of methoxy radicals prepared by the reaction of ground state fluorine atoms with methanol were studied. The intensity of laser-induced fluorescence at 298 nm was used as a measure of methoxy concentration. The presence of various excited molecular products was proven by the analysis of chemiluminescence (CL) spectra. The CL spectra were very complicated and became significantly different when the operating conditions were varied slightly. It was learned that trace amounts of oxygen or air were primarily responsible for these observations.
Download or read book Reactions of Hydroxyl Radicals with Oxygenated Hydrocarbons in the Gas Phase A Laser Photolysis Laser Induced Fluorescence Study written by Cornelie Bänsch and published by Logos Verlag Berlin GmbH. This book was released on 2017 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydroxyl radicals (OH) play a key role in ignition processes and in the atmosphere. Thus, the detailed knowledge of the kinetics of OH reactions is crucial in combustion and atmospheric research. In this work, an experimental approach for time-resolved studies of OH radical reactions at high pressures with pulsed laser photolysis/laser-induced fluorescence was revised and the reactions of dimethyl ether, diethyl ether, and dimethoxymethane with OH radicals were investigated in detail. The results reveal a deeper insight into the reaction processes of ether compounds with OH in general, contributing to a better understanding of the combustion of different biofuels and fuel additives.
Download or read book Laser Induced Kinetics An Experimental and Theoretical Program written by N. Selamoglu and published by . This book was released on 1985 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thhe kinetics of CF3 and CH3 radical reactions have been investigated using the VLPO method. The reactions of interest were radical recombination and metathetical halogenation (Br2, Cl2). In addition to yielding gas-phase reaction rates, these studies pointed out the importance fo gas-surface interactions in the chemistry. The VPLO technique was also used to investigate a radical-surface reaction: the reaction of the CF3 radicals on a silicon oxide surface. The latter study revealed that H2O on the surface plays a major role in the chemistry. The surface reaction was studied as functions of surface temperature (320-530 K) and CF3 concentration. Keywords: Very low-pressure pyrolysis; Laser induced kinetics; Radical surface chemistry; Chlorine; Bromine; Fluorine; and Methane.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1995 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fourth International Microgravity Combustion Workshop written by and published by . This book was released on 1997 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Induced Fluorescence Spectroscopy of the Hydroxyl and Methoxy Radicals written by Abdullahi H. Nur and published by . This book was released on 1991 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Addition and Recombination Reactions of Unsaturated Radicals Using a Novel Laser Kinetics Spectrometer written by Huzeifa Ismail and published by . This book was released on 2008 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes the construction of a novel, low-noise laser kinetics spectrometer. A quasi-CW (picosecond pulse), tunable Ti:Sapphire laser is used to detect various transient species in laser flash photolysis kinetics experiments via direct absorption. The spectral range of the laser, when used with a harmonic generator, covers most of the visible wavelength region, allowing for the detection of a wide array of organic radical species. Paired with a temperature-and pressure-controlled flow reactor equipped with a Herriott-type optical multiple pass cell, transient absorptions of ~0.0001 can be measured, corresponding to cross section - concentration products of less than 1x10-7 cm". The flexibility and high sensitivity of this instrument allows direct and accurate measurement of many important transient intermediates in combustion and atmospheric chemistry.Using this instrument, we report the self-reaction rate coefficient of vinyl and allyl radicals. Vinyl iodide and allyl iodide are used as precursors to generate respective radicals via laser-flash photolysis at 266 nm. Second order chemical reactions require an accurate determination of the initial radical concentration, which we determined using direct laser absorption by I atom at 1315 nm. The current study finds the self-reaction rate constant for vinyl radical to be more than a factor of two slower than previous studies and allyl self reaction rate constant to be 50% faster than values reported in the literature. The absorption cross sections of the vinyl radical at 404, 423.2, & 445 nm and allyl radical at 404 & 408 nm are also determined. This thesis also reports measurements of rate coefficients for the reaction of vinyl radical with various alkenes: ethylene, propene, isobutene, 1-butene, and 2-butene,performed over a temperature range of 300 K to 700 K at 100 Torr. The measured vinyl radical disappearance rates compare well with ab initio quantum calculations. The combined measurements and calculations provide improved estimates for other vinyl + alkene reactions.
Download or read book Laser Studies of Chemical Kinetics written by Dwayne E. Heard and published by . This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Journal of Physical Chemistry written by American Chemical Society and published by . This book was released on 1983 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2626 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molecular and Laser Spectroscopy written by V.P. Gupta and published by Elsevier. This book was released on 2020-07-10 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular and Laser Spectroscopy, Advances and Applications: Volume 2 gives students and researchers an up-to-date understanding of the fast-developing area of molecular and laser spectroscopy. This book covers basic principles and advances in several conventional as well as new and upcoming areas of molecular and laser spectroscopy, such as a wide range of applications in medical science, material science, standoff detection, defence and security, chemicals and pharmaceuticals, and environmental science. It covers the latest advancements, both in terms of techniques and applications, and highlights future projections. Editors V.P. Gupta and Yukihiro Ozaki have brought together eminent scientists in different areas of spectroscopy to develop specialized topics in conventional molecular spectroscopy (Cavity ringdown, Matrix Isolation, Intense THz, Far- and Deep- UV, Optogalvanic ), linear and nonlinear laser spectroscopy (Rayleigh & Raman Scattering), Ultrafast Time-resolved spectroscopy, and medical applications of molecular spectroscopy. and advanced material found in research articles. This new volume expands upon the topics covered in the first volume for scientists to learn the latest techniques and put them to practical use in their work. Covers several areas of spectroscopy research and expands upon topics covered in the first volume Includes exhaustive lists of research articles, reviews, and books at the end of each chapter to further learning objectives Uses illustrative examples of the varied applications to provide a practical guide to those interested in using molecular and laser spectroscopy tools in their research
Download or read book Proceedings of the International Conference on Lasers written by and published by . This book was released on 1995 with total page 930 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Report 1985 written by United States. Presidential Advisory Committee on Small and Minority Business Ownership and published by . This book was released on 1986 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Organic Chemistry written by Pierre Vogel and published by John Wiley & Sons. This book was released on 2019-10-07 with total page 1382 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides the background, tools, and models required to understand organic synthesis and plan chemical reactions more efficiently Knowledge of physical chemistry is essential for achieving successful chemical reactions in organic chemistry. Chemists must be competent in a range of areas to understand organic synthesis. Organic Chemistry provides the methods, models, and tools necessary to fully comprehend organic reactions. Written by two internationally recognized experts in the field, this much-needed textbook fills a gap in current literature on physical organic chemistry. Rigorous yet straightforward chapters first examine chemical equilibria, thermodynamics, reaction rates and mechanisms, and molecular orbital theory, providing readers with a strong foundation in physical organic chemistry. Subsequent chapters demonstrate various reactions involving organic, organometallic, and biochemical reactants and catalysts. Throughout the text, numerous questions and exercises, over 800 in total, help readers strengthen their comprehension of the subject and highlight key points of learning. The companion Organic Chemistry Workbook contains complete references and answers to every question in this text. A much-needed resource for students and working chemists alike, this text: -Presents models that establish if a reaction is possible, estimate how long it will take, and determine its properties -Describes reactions with broad practical value in synthesis and biology, such as C-C-coupling reactions, pericyclic reactions, and catalytic reactions -Enables readers to plan chemical reactions more efficiently -Features clear illustrations, figures, and tables -With a Foreword by Nobel Prize Laureate Robert H. Grubbs Organic Chemistry: Theory, Reactivity, and Mechanisms in Modern Synthesis is an ideal textbook for students and instructors of chemistry, and a valuable work of reference for organic chemists, physical chemists, and chemical engineers.
Download or read book Physics Briefs written by and published by . This book was released on 1994 with total page 934 pages. Available in PDF, EPUB and Kindle. Book excerpt:
