Infrared absorption spectroscopy and chemical kinetics of free radicals. Final performance report, August 1, 1985--July 31, 1994

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This research was directed at the detection, monitoring, and study (by infrared absorption spectroscopy) of the chemical kinetic behavior of small free radical species thought to be important intermediates in combustion. The work typically progressed from the detection and analysis of the infrared spectrum of combustion radical to the utilization of the infrared spectrum thus obtained in the investigation of chemical kinetics of the radical species. The methodology employed was infrared kinetic spectroscopy. In this technique the radical is produced by UV flash photolysis using an excimer laser and then its transient infrared absorption is observed using a single frequency ... continued below

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7 p.

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Curl, R.F. & Glass, G.P. June 1, 1995.

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Description

This research was directed at the detection, monitoring, and study (by infrared absorption spectroscopy) of the chemical kinetic behavior of small free radical species thought to be important intermediates in combustion. The work typically progressed from the detection and analysis of the infrared spectrum of combustion radical to the utilization of the infrared spectrum thus obtained in the investigation of chemical kinetics of the radical species. The methodology employed was infrared kinetic spectroscopy. In this technique the radical is produced by UV flash photolysis using an excimer laser and then its transient infrared absorption is observed using a single frequency cw laser as the source of the infrared probe light. When the probe laser frequency is near the center of an absorption line of the radical produced by the flash, the transient infrared absorption rises rapidly and then decays as the radical reacts with the precursor or with substances introduced for the purpose of studying the reaction kinetics or with itself. The decay times observed in these studies varied from less than one microsecond to more than one millisecond. By choosing appropriate time windows after the flash and the average infrared detector signal in a window as data channels, the infrared spectrum of the radical may be obtained. By locking the infrared probe laser to the center of the absorption line and measuring the rate of decay of the transient infrared absorption signal as the chemical composition of the gas mixture is varied, the chemical kinetics of the radical may be investigated. In what follows the systems investigated and the results obtained are outlined.

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7 p.

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OSTI as DE95013504

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  • Other Information: PBD: [1995]

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  • Other: DE95013504
  • Report No.: DOE/ER/13439--T5
  • Grant Number: FG05-85ER13439
  • DOI: 10.2172/82413 | External Link
  • Office of Scientific & Technical Information Report Number: 82413
  • Archival Resource Key: ark:/67531/metadc779985

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • June 1, 1995

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  • Dec. 3, 2015, 9:30 a.m.

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  • Dec. 18, 2015, 1:21 p.m.

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Curl, R.F. & Glass, G.P. Infrared absorption spectroscopy and chemical kinetics of free radicals. Final performance report, August 1, 1985--July 31, 1994, report, June 1, 1995; United States. (digital.library.unt.edu/ark:/67531/metadc779985/: accessed November 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.