Absolute VUV photoionization spectra for HCHO, HO 2, and H 2 O 2 from 10.5-11.5 eV Leah G. Dodson, 1 Linhan Shen, 1 John D. Savee, 2 Nathan C. Eddingsaas,

Slides:

Advertisements

Similar presentations

Thinh Bui1, Daniel Hogan1, Priyanka M. Rupasinghe1, Mitchio Okumura1

Advertisements

(Bio)Plasma Chemistry Wouter Van Gaens, Annemie Bogaerts PLASMANT University of Antwerp, Belgium Plasma to Plasma! Workshop, Jan 2013.

Reaction Dynamics in Extreme Environments - Boron Reactions Ralf I. Kaiser, University of Hawaii at Manoa (FA ) Reaction Dynamics We have.

© 2009 SRI International Laboratory measurement of the CO Cameron bands and visible emissions following EUV photodissociation of CO 2 Konstantinos S. Kalogerakis,

Nonequilibrium Thermodynamics Laboratories The Ohio State University OH Laser-Induced Fluorescence Measurements in Nanosecond Pulse Discharge Plasmas Inchul.

Spectroscopy With Polarized Light: Polarized Matrix Infrared Spectra of Cyclopentadieneone THOMAS K. ORMOND, ADAM M. SCHEER, G. BARNEY ELLISON, Department.

EVALUATED KINETIC AND PHOTOCHEMICAL DATA FOR ATMOSPHERIC CHEMISTRY Roger Atkinson Air Pollution Research Center University of California Riverside, CA.

Photoionization Mass Spectrometry Studies of Combustion Chemistry Craig A. Taatjes, David L. Osborn, Leonid Sheps, Nils Hansen Combustion Research Facility.

Recent Developments in the Master Equation Program MESMER (Master Equation Solver for Multi-Energy well Reactions) Mark Blitz, David Glowacki 1, Mo Haji,

Time-Resolved Frequency Comb Spectroscopy of Transient Free Radicals in the Mid-IR Bryce J Bjork, Adam J. Fleisher, Bryan Changala, Thinh Quoc Bui, Kevin.

Dual Wavelength Isotope Ratio FS-CRDS Thinh Q. Bui California Institute of Technology ISMS 2014.

KINETICS OF THE SELF-REACTION OF NEOPENTYL RADICALS Ksenia A. Loginova and Vadim D. Knyazev Department of Chemistry, The Catholic University of America,

Jet Propulsion Laboratory California Institute of Technology 1 V-1 11 th HITRAN Conference, Cambridge, MA, June 16-18, 2010 The importance of being earnest.

Millimeter/Submillimeter Spectroscopy of Prebiotic Molecules Formed from the O( 1 D) Insertion Into Methylamine Brian Hays, Althea Roy, and Susanna Widicus.

Michael A. Chaszeyka Non-Equilibrium Thermodynamics Laboratory Absolute OH Number Density Measurements in Lean Fuel-Air Mixtures Excited by a Repetitively.

Kinetic and Mechanistic Study of the Reactions of Atomic Chlorine with C 2 H 5 Br, n-C 3 H 7 Br, and 1,2- C 2 H 4 Br 2 Patrick Laine EAS Advisor: Paul.

Molecular Spectroscopy Symposium June 2011 ROTATIONAL SPECTROSCOPY OF HD 18 O John C. Pearson, Shanshan Yu, Harshal Gupta, and Brian J. Drouin,

Investigation of Deposits in a Carbon Monoxide DBD Robert Geiger Advisor: Dr. David Staack Texas A&M Mechanical Engineering Plasma Engineering & Diagnostics.

Studying Ozonolysis Reactions of 2-Butenes Using Cavity Ring-down Spectroscopy Liming Wang, Yingdi Liu, Mixtli Campos-Pineda, Chad Priest and Jingsong.

1 Miyasaka Laboratory Yusuke Satoh David W. McCamant et al, Science, 2005, 310, Structural observation of the primary isomerization in vision.

A Search for Hydroxlyamine (NH 2 OH) Towards IRC+10216, Orion-S, Orion(KL), SgrB2(N), SgrB2(OH), W512M, W3(IRS5) R. L. Pulliam NRAO / North American ALMA.

CHEM 304 – 2/1/12 I.A. Fundamentals of Atmospheric Chemistry - Concentration Units - Final word on Stability and Trace Species: “Disequilibrium” > READ.

Development of a Near-IR Cavity Enhanced Absorption Spectrometer for the detection of atmospheric oxidation products and amines Nathan C. Eddingsaas Breanna.

Direct Sun measurements of NO 2 column abundances from Table Mountain, California: Retrieval method and intercomparison of low and high resolution spectrometers.

The Advanced Light Source (ALS) at Lawerence Berkeley National Laboratory Berkeley, California Tunable VUV radiation from 8 – 30 eV Brian W. Ticknor 1,

Laboratory Studies of VUV CH 4 Photolysis and Reactions of the Resulting Radicals Robin Shannon, Mark Blitz, Mike Pilling, Dwayne Heard, Paul Seakins University.

Summary  We have implemented numerically stable, continuous method of treating condensation on to grains in Titan’s atmosphere.  Our model can establish.

Cavity Ringdown Spectroscopy and Kinetics of n-Butoxy Isomerization: Detection of the A-X Band of HOC 4 H 8 OO Matthew K. Sprague 1, Mitchio Okumura 1,

Courtney Hatten, Brian Warner, Emily Wright, Kevin Kaskey, Laura R. McCunn Marshall University June 18, 2013.

CHAPTER 1 QUANTITATIVE CHEMISTRY LOOK AT EACH LEARNING GOAL AND WATCH THE TUTORIAL VIDEOS FOR THE GOALS YOU NEED WORK ON.

June 16-20, rd International Symposium on Molecular Spectroscopy Direct Measurements of the Fundamental Rotational Transitions of CD and 13 CH.

Enhancing the Macroscopic Yield of Narrow-Band High-Order Harmonic Generation by Fano Resonances Muhammed Sayrac Phys-689 Texas A&M University 4/30/2015.

THE ANALYSIS OF HIGH RESOLUTION SPECTRA OF ASYMMETRICALLY DEUTERATED METHOXY RADICALS CH 2 DO AND CHD 2 O (RI09) MING-WEI CHEN 1, JINJUN LIU 2, DMITRY.

LOW TEMPERATURE LINESHAPE OF HYDROGEN DEUTERIDE TF14 BRIAN J. DROUIN, HARSHAL GUPTA, JOHN C. PEARSON, Jet Propulsion Laboratory, California Institute of.

Kinetics and Spectroscopy of the Gas Phase (CH 3 ) 2 S–Br Adduct V. Dookwah-Roberts 1, R.J.H. Lee 2, J.M. Nicovich 2, and P.H. Wine 1,2 1 School of Earth.

IR spectra of Methanol Clusters (CH3OH)n Studied by IR Depletion and VUV Ionization Technique with TOF Mass Spectrometer Department of Applied Chemistry.

Industrial Applications of Chemical reactions

The A ← X ABSORPTION SPECTRUM OF 2-NITROOXYBUTYL PEROXY RADICAL

Study of the CH 2 I + O 2 Reaction with a Step-scan Fourier-transform Infrared Absorption Spectrometer: Spectra of the Criegee Intermediate CH 2 OO and.

Photoionization induced intermolecular proton transfer in the CH ●●● O hydrogen bonded cyclopentanone dimer in the gas phase Arup K. Ghosh, Piyali Chatterjee.

Linhan Shen1, Thinh Bui1, Lance Christensen2, Mitchio Okumura1

69th Meeting - Champaign-Urbana, Illinois, 2014 FE11 1/12 JPL Progress Report Keeyoon Sung, Geoffrey C. Toon, Linda R. Brown Jet Propulsion Laboratory,

Requirements for Combustion Kinetics Studies at JLab Craig A. Taatjes, David L. Osborn, Leonid Sheps.

Main Title Manori Perera 1 and Ricardo Metz University of Massachusetts Amherst 64 th International Symposium on Molecular Spectroscopy June 25th, 2009.

Near-Infrared Photochemistry of Atmospheric Nitrites Paul Wennberg, Coleen Roehl, Geoff Blake, and Sergey Nizkorodov California Institute of Technology.

Infrared Spectra of N 2 -broadened 13 CH 4 at Titan Atmospheric Temperatures Mary Ann H. Smith 1, Keeyoon Sung 2, Linda R. Brown 2, Timothy J. Crawford.

1. 2 Natural Anthropogenic 3  Production of OH radical  An important source of HOx  The observed yields: 10% - 100%.  Generate Criegee intermediate.

A b Submillimeter measurements of the Criegee intermediate CH 2 OO, in the gas phase ADAM M. DALY, BRIAN J. DROUIN, SHANSHAN YU Jet Propulsion Laboratory,

Laser Spectroscopy of the C 1 Σ + – X 1 Σ + Transition of ScI ZHENWU LIAO, MEI YANG, MAN-CHOR CHAN Department of Chemistry, The Chinese University of Hong.

Barney Ellison — ISMS, RB05

Submillimeter absorption spectroscopy in semiconductor manufacturing plasmas and comparison to theoretical models Yaser H. Helal, Christopher F. Neese,

The Cl+H 2  HCl+H reaction induced by IR+UV irradiation of Cl 2 in solid parahydrogen Sharon C. Kettwich and David T. Anderson Department of Chemistry,

Water network-mediated, electron induced proton transfer in anionic [C 5 H 5 N·(H 2 O) n ]¯ clusters: Size-dependent formation of the pyridinium radical.

Thermal Decomposition of Benzyl Radical via Multiple Active Pathways Grant Buckingham, Thomas Ormond, David Robichaud, Patrick Hemberger Mark Nimlos, John.

The Mole. How do we measure the amount of a substance? Matter is made of different kinds of particles. We count the number of particles of that substance.

Combustion Products of Ethyl Tert-Butyl Ether using Synchrotron Photoionization Method Reactions are carried out using a multiplexed time-resolved mass.

Initial Development of High Precision, High Resolution Ion Beam Spectrometer in the Near- Infrared Michael Porambo, Brian Siller, Andrew Mills, Manori.

Ivan Antonov, Leonid Sheps 70 th International Symposium on Molecular Spectroscopy CHARACTERIZATION OF REACTION PATHWAYS IN LOW TEMPERATURE OXIDATION OF.

The Overtone Spectrum of HOONO: A Twisted Tale Juliane L. Fry, Andrew Mollner, Paul Wennberg, Mitchio Okumura California Institute of Technology Anne B.

Global Modelling of the First Three Torsional States of Methanol ( v t = 0, 1, 2, J max = 30): (CH 3 OH & CH 3 18 OH) Jonathan Fisher, Gregory Paciga,

Investigation of Oxidation Reaction Products of 2-Phenylethanol using Synchrotron Photoionization Investigation of Oxidation Reaction Products of 2-Phenylethanol.

Kinetics measurements of HO 2 and RO 2 self and cross reactions using infrared kinetic spectroscopy (IRKS) A.C. Noell, L. S. Alconcel, D.J. Robichaud,

Spectroscopic and Kinetic Studies of Atmospheric Free Radicals

Jet Propulsion Laboratory, Pasadena, CA

Linhan Shen1, Thinh Bui1, John Eiler2, Mitchio Okumura1

International Symposium on Molecular Spectroscopy, 2017

Photoacoustic Spectroscopy of the Oxygen A-band

Three common mechanisms for bimolecular quenching

Quantum Chemical Studies of Low-Energy Pathways to

Three common mechanisms for bimolecular quenching

Presentation transcript:

Absolute VUV photoionization spectra for HCHO, HO 2, and H 2 O 2 from eV Leah G. Dodson, 1 Linhan Shen, 1 John D. Savee, 2 Nathan C. Eddingsaas, 1 Oliver Welz, 2 Craig A. Taatjes, 2 David L. Osborn, 2 Stanley P. Sander, 3 and Mitchio Okumura, 1 1 California Institute of Technology, Pasadena, CA 2 Combustion Research Facility, Sandia National Laboratories, Livermore, CA 3 Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA Thursday, June 20, :44pm RI15

Introduction Absolute VUV photoionization spectra difficult to obtain for these three species Need accurate number density ([N](t)) to obtain absolute cross section (σ(E)) We use a chemical kinetics model to determine concentrations with low error Formaldehyde, HCHO IE = eV 1 Hydroperoxy radical, HO 2 IE = eV 1 Hydrogen peroxide, H 2 O 2 IE = eV 1 1 Lias, S.G., "Gas Phase Ion Energetics Data" in NIST Chemistry WebBook, NIST Standard Reference Database Number 69 Linstrom, P. J.; Mallard, W. G., Eds.

A simple chemical system yields three important spectra Formation and self-reaction of HO 2 from Cl 2 and CH 3 OH precursor give HCHO, HO 2, and H 2 O 2. 1 Reaction scheme well-constrained = concentrations predicted with minimal error. 1 JPL Database, Sander, S. P., et al. JPL Publication

Sandia Multiplexed Chemical Kinetics Reactor VUV Multiplexed Photoionization Mass Spectrometer (MPIMS) 1 1 Osborn, D. L., et al. Rev. Sci. Instrum. 2008, 79..

Sandia Multiplexed Chemical Kinetics Reactor VUV Multiplexed Photoionization Mass Spectrometer (MPIMS) 1 1 Osborn, D. L., et al. Rev. Sci. Instrum. 2008, 79..

Total radical concentration 37 Cl 2 + depletion signal: 1.06 ± 0.02 % Cl atom concentration should be known to high accuracy for kinetic modeling 13 CH 3 OH + depletion signal: 4.34 ± 0.07 % Cl atom concentration: (1.22 ± 0.07)×10 13 molec/cm 3

Kinetics experiments to quantify concentrations Kinetics model predicts time-dependent concentration based on well-known rate constants. 1,2 Model convolved with instrument response function. 1 Kinetics model build using Kintecus modeling software. Ianni, J. C Most rate constants taken from JPL Database, Sander, S. P., et al. JPL Publication Typical experimental conditions: Photon energy: eV Pressure: 8 Torr Flow rate: 200 sccm Starting reactants (molec/cm 3 ): [CH 3 OH] = 3.75×10 14 [O 2 ] = 7.80×10 16 [Cl 2 ] = 8.09×10 14 [Cl] = 1.22×10 13

Formaldehyde absolute VUV photoionization spectrum 1 Cooper, G., et al. Chem. Phys. 1996, 209, FitzPatrick, B. L., et al. J. Chem. Phys. 2010, 133, Compared with absolute cross section measurements by Cooper, et al. 1 and FitzPatrick, et al. 2

HO 2 and H 2 O 2 absolute VUV photoionization spectra 1 Litorja, M. and Ruscic, B. J. Electron Spectrosc. Relat. Phenom. 1998, 97, 131. Compared with relative cross section measurements by Litorja and Ruscic. 1 Results from Litorja and Ruscic were scaled to the absolute spectra measured here for qualitative shape agreement. Residual methanol

Acknowledgements: Caltech: Linhan Shen, Nathan Eddingsaas (RIT), Kana Takematsu, Aaron Noell, Mitchio Okumura, Stan Sander (JPL), Fred Grieman (Pomona) Sandia: John Savee, Oliver Welz, Craig Taatjes, David Osborn LBNL: Stephen Leone, Musa Ahmed, Kevin Wilson Funding: EPA STAR Fellowship (LGD) NSF, NASA, DOE, Dreyfus (NCE)