Infrared laser induced organic reactions. Technical progress report, October 15, 1980

• Main Author: Farneth, W E
• Language: unknown
• Published: 2017
• Subjects: 37 INORGANIC; ORGANIC; PHYSICAL AND ANALYTICAL CHEMISTRY; ALKENES; PHOTOCHEMISTRY; CARBONIC ACID ESTERS; CYCLOALKANES; ETHERS; HETEROCYCLIC OXYGEN COMPOUNDS; CARBON DIOXIDE LASERS; DEUTERIUM COMPOUNDS; INFRARED SPECTRA; MEDIUM VACUUM; PRESSURE DEPENDENCE; PULSED IRRADIATION; RESEARCH PROGRAMS; ALKANES; CHEMISTRY; ESTERS; GAS LASERS; HYDROCARBONS; HYDROGEN COMPOUNDS; IRRADIATION; LASERS; ORGANIC COMPOUNDS; ORGANIC OXYGEN COMPOUNDS; SPECTRA; Carbonic acid
• Online Access: http://www.osti.gov/servlets/purl/6904060; https://www.osti.gov/biblio/6904060; https://doi.org/10.2172/6904060

As outlined in the original proposal, experiments of two types have been pursued. In the first, the competition among activation, deactivation, and chemical reaction rates in laser-activated organic vapors were investigated. In the second, potential applications of infrared multiphoton activation to studies of organic reaction dynamics were explored. For the first phase, infrared laser induced chemistry of vinylcyclopropane irradiated with a CO/sub 2/ TEA laser at relatively low pressures has been thoroughly investigated. Changes in yield and product distribution as a function of bath gas pressure, laser fluence, laser frequency, number of pulses, and laser intensity have been systematically studied. Concurrently, model calculations employing RRKM theory have been undertaken. From this combination, conclusions have been drawn about various aspects of the energy distribution among reacting molecules. Also, to test the assumption that the internal energy of the activated reactant is randomly distributed, tracer-induced reactions of bicyclopropyl-d/sub 4/ and diethylcarbonate have been investigated. The second phase, application of multiphoton activation to problems in organic reactivity, is less advanced. A substituted oxetane was prepared and irradiated with CO/sub 2/ laser and its decomposition studied. Infrared laser activation of heterogeneous reactions are also being investigated by examining the reactivity of carbon surfaces during laser irradiation.