Download or read book Collision Dynamics of Methyl Radicals and Highly Vibrationally Excited Molecules Using Crossed Molecular Beams written by and published by . This book was released on 1991 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vibrational to translational (V-->T) energy transfer in collisions between large highly vibrationally excited polyatomics and rare gases was investigated by time-of-flight techniques. Two different methods, UV excitation followed by intemal conversion and infrared multiphoton excitation (IRMPE), were used to form vibrationally excited molecular beams of hexafluorobenzene and sulfur hexafluoride, respectively. The product translational energy was found to be independent of the vibrational excitation. These results indicate that the probability distribution function for V-->T energy transfer is peaked at zero. The collisional relaxation of large polyatomic molecules with rare gases most likely occurs through a rotationally mediated process. Photodissociation of nitrobenzene in a molecular beam was studied at 266 nm. Two primary dissociation channels were identified including simple bond rupture to produce nitrogen dioxide and phenyl radical and isomerization to form nitric oxide and phenoxy radical. The time-of-flight spectra indicate that simple bond rupture and isomerization occurs via two different mechanisms. Secondary dissociation of the phenoxy radicals to carbon monoxide and cyclopentadienyl radicals was observed as well as secondary photodissociation of phenyl radical to give H atom and benzyne. A supersonic methyl radical beam source is developed. The beam source configuration and conditions were optimized for CH3 production from the thermal decomposition of azomethane. Elastic scattering of methyl radical and neon was used to differentiate between the methyl radicals and the residual azomethane in the molecular beam.
Download or read book Collision Dynamics of Methyl Radicals and Highly Vibrationally Excited Molecules Using Crossed Molecular Beams written by Pamela Mei-Ying Chu and published by . This book was released on 1991 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamics of Molecular Collisions written by W. Miller and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: Activity in any theoretical area is usually stimulated by new experimental techniques and the resulting opportunity of measuring phenomena that were previously inaccessible. Such has been the case in the area under consideration he re beginning about fifteen years aga when the possibility of studying chemical reactions in crossed molecular beams captured the imagination of physical chemists, for one could imagine investigating chemical kinetics at the same level of molecular detail that had previously been possible only in spectroscopic investigations of molecular stucture. This created an interest among chemists in scattering theory, the molecular level description of a bimolecular collision process. Many other new and also powerful experimental techniques have evolved to supplement the molecular be am method, and the resulting wealth of new information about chemical dynamics has generated the present intense activity in molecular collision theory. During the early years when chemists were first becoming acquainted with scattering theory, it was mainly a matter of reading the physics literature because scattering experiments have long been the staple of that field. It was natural to apply the approximations and models that had been developed for nuclear and elementary particle physics, and although some of them were useful in describing molecular collision phenomena, many were not.
Download or read book Dynamics of Molecular Collisions written by W. Miller and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: Activity in any theoretical area is usually stimulated by new experimental techniques and the resulting opportunity of measuring phenomena that were previously inaccessible. Such has been the case in the area under consideration here beginning about fifteen years ago when the possibility of studying chemical reactions in crossed molecular beams captured the imagination of physical chemists, for one could imagine investigating chemical kinetics at the same level of molecular detail that had previously been possible only in spectroscopic investigations of molecular stucture. This created an interest among chemists in scattering theory, the molecular level description of a bimolecular collision process. Many other new and also powerful experimental techniques have evolved to supplement the molecular beam method, and the resulting wealth of new information about chemical dynamics has generated the present intense activity in molecular collision theory. During the early years when chemists were first becoming acquainted with scattering theory, it was mainly a matter of reading the physics literature because scattering experiments have long been the staple of that field. It was natural to apply the approximations and models that had been developed for nuclear and elementary particle physics, and although some of them were useful in describing molecular collision phenomena, many were not. The most relevant treatise then available to students was Mott and Massey's classic The Theory of Atomic Collisions, * but, as the title implies, it dealt only sparingly with the special features that arise when at least one of the collision partners is a molecule.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1993-02 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atomic and Molecular Collision Dynamics in Very High Energy Chemical Systems written by John W. Root and published by . This book was released on 1973 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: A research program is summarized which included several topics in chemical kinetics. A new, steady state statistical mechanical theory was developed which describes and interprets high energy chemical reactions. Photochemical measurement of reaction thresholds have revealed special chemical characteristics of vibrationally hot methyl radicals. In a separate series of investigations, another aspect of the behavior of vibrationally hot species was studied. New and general results were obtained pertaining to the unimolecular behavior of fluorinated alkanes as well as their bimolecular energy transfer processes. Basic studies were completed on the chemical dependence of low velocity heavy ion stopping powers. Preliminary experimental results of molecular sizes to their critical state properties. (Author).
Download or read book Highly Excited Molecules written by Amy S. Mullin and published by . This book was released on 1997 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Integrating both theoretical and experimental approaches, this unique book examines transition states and chemical reactivity, and will be a useful tool for anyone studying the chemical dynamics, nature, and behavior of molecules in an excited state. The subject has important applications in atmospheric chemistry, plasmas, high-temperature materials processing, combustion, photosynthesis, detonation, and explosives.
Download or read book Crossed Molecular Beam Studies of Atmospheric Chemical Reaction Dynamics written by Jingsong Zhang and published by . This book was released on 1993 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Crossed Molecular Beam Studies of State to state Rotational Vibrational and Electronic Energy Transfer in Collisions of Glyoxal Iodine and Nitric Oxide written by Steven Douglas Jons and published by . This book was released on 1992 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Molecular Vibrations and Collision Dynamics written by Joel Bowman and published by Jai Press. This book was released on 1998-09-25 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume focuses on molecular clusters, bound by van der Waals interactions and hydrogen bonds. Twelve chapters review a wide range of recent theoretical and experimental advances in the areas of cluster vibrations, spectroscopy, and reaction dynamics. The authors are leading experts, who have made significant contributions to these topics. The first chapter describes exciting results and new insights in the solvent effects on the short-time photo fragmentation dynamics of small molecules, obtained by combining heteroclusters with femtosecond laser excitation. The second is on theoretical work on effects of single solvent (argon) atom on the photodissociation dynamics of the solute H2O molecule. The next two chapters cover experimental and theoretical aspects of the energetics and vibrations of small clusters. Chapter 5 describes diffusion quantum Monte Carlo calculations and non additive three-body potential terms in molecular clusters. The next six chapters deal with hydrogen-bonded clusters, reflecting the ubiquity and importance of hydrogen-bonded networks. The final chapter provides the microscopic theory of the dynamics and spectroscopy of doped helium cluster, highly quantum systems whose unusual properties have been studied extensively in the past couple of years.
Download or read book Dynamics of Molecular Collisions written by W. Miller and published by Springer. This book was released on 1976-12-01 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: Activity in any theoretical area is usually stimulated by new experimental techniques and the resulting opportunity of measuring phenomena that were previously inaccessible. Such has been the case in the area under consideration he re beginning about fifteen years aga when the possibility of studying chemical reactions in crossed molecular beams captured the imagination of physical chemists, for one could imagine investigating chemical kinetics at the same level of molecular detail that had previously been possible only in spectroscopic investigations of molecular stucture. This created an interest among chemists in scattering theory, the molecular level description of a bimolecular collision process. Many other new and also powerful experimental techniques have evolved to supplement the molecular be am method, and the resulting wealth of new information about chemical dynamics has generated the present intense activity in molecular collision theory. During the early years when chemists were first becoming acquainted with scattering theory, it was mainly a matter of reading the physics literature because scattering experiments have long been the staple of that field. It was natural to apply the approximations and models that had been developed for nuclear and elementary particle physics, and although some of them were useful in describing molecular collision phenomena, many were not.
Download or read book Molecular Collision Dynamics written by Michael Baer and published by Springer. This book was released on 1983 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molecular Beam Studies of Oxygen Atom Reactions with Unsaturated Hydrocarbons written by Annemarie Schmoltner and published by . This book was released on 1989 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molecular Collision Dynamics written by M Baer and published by . This book was released on 1983-03-01 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Crossed Molecular Beam Studies written by D. R. Herschbach and published by . This book was released on 1987 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes three of investigations: 1) studies of van der Waals collision dynamics, 2) laser spectroscopy study of rotational vibrational relaxations, and 3) angular correlations in chemical reactions. A cross molecular beam apparatus was used to study several van der Waals bond exchange reactions. These collisions involving extremely weak interactions were found to have product velocity distributions which resemble those from several ion molecular reactions which occur at very high collision energy. This led to the theoretical development of a scattering model which should be applicable to a wide range of reactive and inelastic collision processes at kinetic energies higher than the bond strengths. In another effort, laser induced fluorescence experiments were performed to measure the rotational and vibrational temperatures of molecular iodine seeded in beams of helium, argon, or nitrogen expanded from a supersonic nozzle. The results demonstrated the utility of seeded iodine fluorescence as a diagnostic for pulse shape and collisional relaxation in pulsed supersonic beams. Lastly, theoretical calculations dealing with rotational orientation in molecular collisions resulted in the formulation of a correlation analysis which offers a means to obtain information about collision dynamics that would otherwise be lost by averaging over the initial impact parameters and molecular orientations.
Download or read book Bimolecular Collisions written by M. N. R. Ashfold and published by . This book was released on 1989 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designed to provide an authoritative and timely review of advances in the field of gas-phase photochemistry and kinetics, this volume contains a collection of papers on biomolecular collisions. Contributors discuss collision processes, reactive processes and association reactions.
Download or read book Reaction Dynamics Involving Ions Radicals Neutral and Excited Species written by Stefano Falcinelli and published by Frontiers Media SA. This book was released on 2020-01-22 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt:
