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

Technical Report · Sat Mar 01 04:00:00 EST 1980

DOI:https://doi.org/10.2172/6904060· OSTI ID:6904060

Farneth, W E

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.

• Research Organization: Minnesota Univ., Minneapolis, MN (USA). Dept. of Chemistry
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-80ER10592
• OSTI ID: 6904060
• Report Number(s): DOE/ER/10592-1
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
ALKANES
ALKENES
CARBON DIOXIDE LASERS
CARBONIC ACID ESTERS
CHEMISTRY
CYCLOALKANES
DEUTERIUM COMPOUNDS
ESTERS
ETHERS
GAS LASERS
HETEROCYCLIC OXYGEN COMPOUNDS
HYDROCARBONS
HYDROGEN COMPOUNDS
INFRARED SPECTRA
IRRADIATION
LASERS
MEDIUM VACUUM
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PHOTOCHEMISTRY
PRESSURE DEPENDENCE
PULSED IRRADIATION
RESEARCH PROGRAMS
SPECTRA