The multiplexed chemical kinetic photoionization mass spectrometer: a new approach to isomer-resolved chemical kinetics.

@article{Osborn2008TheMC,
  title={The multiplexed chemical kinetic photoionization mass spectrometer: a new approach to isomer-resolved chemical kinetics.},
  author={David L. Osborn and Peng Zou and Howard A. Johnsen and Carl C. Hayden and Craig A. Taatjes and Vadim D. Knyazev and Simon W. North and Darcy S. Peterka and Musahid Ahmed and Stephen R. Leone},
  journal={The Review of scientific instruments},
  year={2008},
  volume={79 10},
  pages={
          104103
        }
}
  • D. OsbornP. Zou S. Leone
  • Published 31 October 2008
  • Physics, Chemistry
  • The Review of scientific instruments
We have developed a multiplexed time- and photon-energy-resolved photoionization mass spectrometer for the study of the kinetics and isomeric product branching of gas phase, neutral chemical reactions. The instrument utilizes a side-sampled flow tube reactor, continuously tunable synchrotron radiation for photoionization, a multimass double-focusing mass spectrometer with 100% duty cycle, and a time- and position-sensitive detector for single ion counting. This approach enables multiplexed… 

Mass-Resolved Isomer-Selective Chemical Analysis with Imaging Photoelectron Photoion Coincidence Spectroscopy

Photoionization mass spectrometry is a powerful method for time- and space-resolved chemical analysis of reactants, intermediates, and products. Tunable synchrotron light enables isomer separation

"Imaging" combustion chemistry via multiplexed synchrotron-photoionization mass spectrometry.

An overview of flame chemistry and chemical kinetics measurements that combine tunable photoionization with multiple-mass detection, emphasizing the overall insight that can be gained from multidimensional data on these systems.

A combined photoionization time-of-flight mass spectrometry and laser absorption spectrometry flash photolysis apparatus for simultaneous determination of reaction rates and product branching.

An apparatus is described that aims to fill the void in predictions of product branching for reactions of consequence to both combustion and atmospheric chemistry by combining several well-known experimental techniques into one: flash photolysis for radical generation, multiple-pass laser absorption spectrometry (LAS) for overall kinetics measurements, and time-resolved photoionization time-of-flight mass spectromaetry (PI TOF-MS) for product branching quantification.

A Sensitive Mass Spectrometer for Time-Resolved Gas-Phase Chemistry Studies at High Pressures.

The capability of this apparatus is demonstrated by probing the ethyl radical oxidation reaction using very dilute (<1012 molecules·cm-3) ethyl concentrations at pressures up to 25 bar, using a 40-kHz pulsed reflectron time-of-flight mass spectrometer.

High-Resolution Double Velocity Map Imaging Photoelectron Photoion Coincidence Spectrometer for Gas-Phase Reaction Kinetics.

We present a new photoelectron photoion coincidence (PEPICO) spectrometer that combines high mass resolution of cations with independently adjustable velocity map imaging of both cations and

Vacuum Ultraviolet Photoionization of Complex Chemical Systems.

Experimental and theoretical methods to track ion-molecule reactions and fragmentation pathways in intermolecular and intramolecular hydrogen-bonded systems in sugars and alcohols and new directions in coupling VUV radiation to interrogate complex chemical systems are discussed.

Time-Resolved Kinetic Chirped-Pulse Rotational Spectroscopy in a Room-Temperature Flow Reactor.

Chirped-pulse Fourier transform millimeter-wave spectroscopy is a potentially powerful tool for studying chemical reaction dynamics and kinetics. Branching ratios of multiple reaction products and

CRF-PEPICO: Double velocity map imaging photoelectron photoion coincidence spectroscopy for reaction kinetics studies.

The designed and tested electron and ion optics that form the core of a new PEPICO spectrometer, utilizing simultaneous velocity map imaging for both cations and electrons, while also achieving good cation mass resolution through space focusing, yields tightly focused photoion images for translationally cold neutrals, while offering good mass resolution for thermal samples as well.

Crossed beam polyatomic reaction dynamics: recent advances and new insights.

This review highlights recent progress in the field of CMB reaction dynamics, with an emphasis on the experimental side, but with the related theoretical work, at the level of state-of-the-art calculations of both the underlying potential energy surfaces and the reaction dynamics.
...

References

SHOWING 1-10 OF 30 REFERENCES

"Imaging" combustion chemistry via multiplexed synchrotron-photoionization mass spectrometry.

An overview of flame chemistry and chemical kinetics measurements that combine tunable photoionization with multiple-mass detection, emphasizing the overall insight that can be gained from multidimensional data on these systems.

Repetitively sampled time-of-flight mass spectrometry for gas-phase kinetics studies

An apparatus has been constructed to study radical–radical reactions in the gas phase. It consists of a tubular quartz reactor in which radicals are produced by flash photolysis using an excimer

Application of molecular beam mass spectrometry to chemical vapor deposition studies

A molecular beam mass spectrometer system has been designed and constructed for the specific purpose of measuring the gaseous composition of the vapor environment during chemical vapor deposition of

Energy-resolved photoionization of alkylperoxy radicals and the stability of their cations.

The photoionization of alkylperoxy radicals has been investigated using a newly developed experimental apparatus that combines the tunability of the vacuum ultraviolet radiation of the Advanced Light

Synchrotron photoionization mass spectrometry measurements of kinetics and product formation in the allyl radical (H2CCHCH2) self-reaction.

This result provides independent indirect support for the literature value of the allyl radical ultraviolet absorption cross-section near 223 nm, in good agreement with previous experimental measurements and a recent theoretical determination using variable reaction coordinate transition state theory.

Direct identification of propargyl radical in combustion flames by vacuum ultraviolet photoionization mass spectrometry.

The excellent agreement of the IE value and the pattern of autoionizing features of the VUV-PIE spectra observed in the photodissociation and flames studies has provided an unambiguous identification of the propargyl radical as an important intermediate in the premixed combustion flames.

Flash photolysis and spectroscopy. A new method for the study of free radical reactions

  • G. Porter
  • Chemistry
    Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
  • 1950
Photochemistry provides us with one of the most generally useful methods of studying the reactions of free radicals and atoms, but the concentration of these intermediates in the usual photochemical

Photoelectron spectrum of the propargyl radical in a supersonic beam

The laser photoionization mass and photoelectron spectra of propargyl radical (l-C{sub 3}H{sub 3}) and two partially deuterated isotopomers are measured in a supersonic molecular beam. Radicals were