Download or read book Dimethyl Sulfoxide Photodissociation Studies in a Molecular Beam written by Gail M. Thorson and published by . This book was released on 1997 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Molecular Beam Studies of Unimolecular and Bimolecular Chemical Reaction Dynamics Using VUV Synchrotron Radiation as a Product Probe written by and published by . This book was released on 1997 with total page 267 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation describes the use of a new molecular beam apparatus designed to use tunable VUV synchrotron radiation for photoionization of the products from scattering experiments. The apparatus was built at the recently constructed Advanced Light Source at Lawrence Berkeley National Laboratory, a third generation 1-2 GeV synchrotron radiation source. The new apparatus is applied to investigations of the dynamics of unimolecular reactions, photodissociation experiments, and bimolecular reactions, crossed molecular beam experiments. The first chapter describes the new apparatus and the VUV radiation used for photoionization. This is followed by a number of examples of the many advantages provided by using VUV photoionization in comparison with the traditional technique of electron bombardment ionization. At the end of the chapter there is a discussion of the data analysis employed in these scattering experiments. The remaining four chapters are complete investigations of the dynamics of four chemical systems using the new apparatus and provide numerous additional examples of the advantages provided by VUV photoionizaiton of the products. Chapters 2-4 are photofragment translational spectroscopy studies of the photodissociation dynamics of dimethyl sulfoxide, acrylonitrile, and vinyl chloride following absorption at 193 mn. All of these systems have multiple dissociation channels and provide good examples of the ability of the new apparatus to unravel the complex UV photodissociation dynamics that can arise in small polyatomic molecules.

Download or read book Molecular Beam Studies of Unimolecular and Bimolecular Chemical Reaction Dynamics Using VUV Synchrotron Radiation as a Product Probe written by David Andrew Blank 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 Unimolecular Photodissociation Studies in Molecular Beams and Flow Tubes written by Wyatt Gibson Merrill and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: We conduct studies utilizing unimolecular photodissociation in two apparatus: (1) a high vacuum molecular beam chamber capable of time-of-flight mass spectrometry and velocity map imaging and (2) a newly constructed high-pressure flow tube apparatus with laser-induced fluorescence detection. Tunable, pulsed ns-laser systems initiate photodissociation in both experiments and probe the resultant products. The molecular beam apparatus resolves quantum-specific product states following CHBrCl2 photodissociation in the Ã-band, leading to CHCl2 and Br photofragments. We use resonance enhanced multiphoton ionization to distinguish between the spin-orbit states of the Br products and velocity map imaging to probe energy disposal at a variety of photolysis wavelengths. We examine the role of electronic surface crossing in the dynamics and relative quantum yields for the exit channels. Additionally, we constructed and characterized a flow tube apparatus designed for measurements of unimolecular kinetics relevant to atmospheric chemistry. The work presented will cover methodology for characterizing fluid dynamics in the flow tube and the laser-induced fluorescence detection capabilities we use to probe products generated in the flow. By varying the transport properties of the flow, we aim to extract rate coefficients for unimolecular processes that compete with bimolecular chemistry in the troposphere under a variety of conditions.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Research Abstracts written by and published by . This book was released on 1990 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Polarographic Studies in Dimethyl Sulfoxide written by Robert Tilden Burrus and published by . This book was released on 1962 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Photodissociation Processes in Molecular Beams written by Lee Richard Carlson and published by . This book was released on 1979 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Photodissociation Studies of the Chlorotoluenes at 193 Nm and 248 Nm written by Marion Skalweit Helfand and published by . This book was released on 1989 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Studies in Molecular Photodissociation written by David Gareth Weston and published by . This book was released on 1993 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chemical Applications of Synchrotron Radiation written by Tsun-Kong Sham and published by World Scientific. This book was released on 2002 with total page 1302 pages. Available in PDF, EPUB and Kindle. Book excerpt: The synchrotron light source is becoming widely available, after its evolution from its infancy in the sixties to the present third generation source with insertion devices. It is timely to examine the impact that synchrotron light has made and will continue to make on chemical research. With this objective in mind, the editor of this invaluable book invited contributions from practitioners who are in the forefront of the research. The book summarizes most of the significant developments in the last decade in chemical and related research using synchrotron light. The utilization of the light as a probe as well as an energy source is emphasized.This book is organized into two parts, in order of increasing photon energy. Part I deals with the applications of low energy photons and covers areas such as gas phase photodissociation reactions and dynamics, soft X-ray fluorescence, IR and photoemission analysis of surfaces, spectroscopy of organic and polymeric materials, catalysts, electronic and magnetic materials, and spectromicroscopy. Part II encompasses applications using soft to hard X-rays, including spectroscopy of surface and thin films, XAFS, diffraction and scattering, and several technological applications, namely the microprobe, photoetching and tribology.

Download or read book Spectrophotometric Studies of Polysulfides in Dimethyl Sulfoxide Electrochemical and Spectrophotometric Studies of Molybdenum VI V and III Complexes Electrochemical Oxidation of Tetraethyl Ammonium Hydroxide in Dimethyl Sulfoxide written by William Howard Doub and published by . This book was released on 1975 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Polarographic Studies in Dimethyl Sulfoxide written by Robert T. Burrus and published by . This book was released on 1970 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Photodissociation of Cyclic Compounds in a Molecular Beam written by Xinsheng Zhao and published by . This book was released on 1989 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Photodissociation Processes in Molecular Beams written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A description is presented of a study of the photodissociation dynamics of molecules in a molecular beam. Photo-fragmentation translational spectroscopy has been utilized to observe the photodissociation dynamics of ozone. Using a supersonic molecular beam and a 10 nanosecond pulsed laser at lambda = 266 nm, the velocities of the fragment products are measured by the method of time of flight. The resolution of the time of flight spectrum of ozone is sufficiently high that the electronic and vibrational states are clearly resolved and identified. Above the threshold (lambda 310 nm), the quantum yield for the production of O(1D) has been estimated in the past to be unity for the process O3 (1A1) + h.nu.)lambda 300 nm) .--. O3(1B2) .--. O2(1.delta./sub g/) + O(1D). However a small production of O2 (3.sigma./sub g/−) + O(3P) has been observed in this study. The O2(1.delta./sub g/) product yields four vibrational states (v = 0, 1, 2, 3) which yields a vibrational temperature of 2700°K along with narrow energy distributions of rotational levels. These energy distributions are compared with photodissociation models along with the polarization dependence of the dissociative process which was also measured. 143 references.

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2006 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chemical Applications Of Synchrotron Radiation Part I Dynamics And Vuv Spectroscopy Part Ii X ray Applications written by Tsun-kong Sham and published by World Scientific. This book was released on 2002-05-30 with total page 1302 pages. Available in PDF, EPUB and Kindle. Book excerpt: The synchrotron light source is becoming widely available, after its evolution from its infancy in the sixties to the present third generation source with insertion devices. It is timely to examine the impact that synchrotron light has made and will continue to make on chemical research. With this objective in mind, the editor of this invaluable book invited contributions from practitioners who are in the forefront of the research. The book summarizes most of the significant developments in the last decade in chemical and related research using synchrotron light. The utilization of the light as a probe as well as an energy source is emphasized.This book is organized into two parts, in order of increasing photon energy. Part I deals with the applications of low energy photons and covers areas such as gas phase photodissociation reactions and dynamics, soft X-ray fluorescence, IR and photoemission analysis of surfaces, spectroscopy of organic and polymeric materials, catalysts, electronic and magnetic materials, and spectromicroscopy. Part II encompasses applications using soft to hard X-rays, including spectroscopy of surface and thin films, XAFS, diffraction and scattering, and several technological applications, namely the microprobe, photoetching and tribology.