title: Fourier transform infrared-probed O(3P) microreactor: demonstration with ethylene reactions in argon matrix.
abstract: To demonstrate the development of an oxygen atom microreactor in the form of liquid-helium-cooled solid argon matrix deposited on an infrared (IR) window, the oxidation of ethylene by mobile O atoms has been investigated. O atom diffusion through the argon matrix is confirmed and used to examine ethylene-oxygen atom reactions. In a bench-scale matrix isolation system probed with a Fourier transform infrared (FT-IR) spectrometer, matrices of solid Ar at 8-10 K doped with NO2 and ethylene have been prepared on a ZnSe window within an evacuated cryostat. The matrices have been photolyzed using 350-450 nm photons, and the reaction products resulting from the reaction of O(3P), one of the photolysis products of NO2, with ethylene have been identified using FT-IR and a Gaussian 98W simulation program. These products include oxirane, acetaldehyde, ethyl nitrite radical, and ketene. The temperature effect in the range of 10-30 K on the products formed has also been investigated. The reaction mechanisms are discussed and the viability of the solid Ar matrix being a low temperature microreactor to examine reaction mechanisms of mobile oxygen atoms is elaborated.
authors.affiliation: Department of Chemical Engineering, Lamar University, Beaumont, Texas 77710, USA.
authors.forename: John L
authors.initials: JL
authors.lastname: Gossage
authors.forename: Jewel A G
authors.initials: JA
authors.lastname: Gomes
authors.forename: David L
authors.initials: DL
authors.lastname: Cocke
authors.forename: Kuyen
authors.initials: K
authors.lastname: Li
authors.forename: Che-Jen
authors.initials: CJ
authors.lastname: Lin
authors.forename: Rafael
authors.initials: R
authors.lastname: Tadmor
authors.forename: Abir
authors.initials: A
authors.lastname: Basu
authors.forename: Shagun
authors.initials: S
authors.lastname: Bhat
authors.forename: Satish
authors.initials: S
authors.lastname: Tandel
authors.forename: Prashanth
authors.initials: P
authors.lastname: Jayabalu
authors.forename: Harimadhav
authors.initials: H
authors.lastname: Balu
mesh_terms: D001128:Argon / Q000737:chemistry*; D001695:Biology; D035843:Biomedical Research; D003198:Computer Simulation; D005030:Ethylenes / Q000737:chemistry*; D008904:Miniaturization; D010100:Oxygen / Q000032:analysis*; D010782:Photolysis; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods*
chemical_list: D005030:Ethylenes; D001128:Argon; C036216:ethylene; D010100:Oxygen