Oxygen isotope-selective IR multiphoton dissociation of methyl isopropyl ether

Journal Article · Wed Mar 01 04:00:00 EST 1995 · High Energy Chemistry

OSTI ID:75736

Laptev, V B; Tumanova, L M; Ryabov, E A ^[1]

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1. Institute of Spectroscopy, Moscow (Russian Federation)

The {sup 18}O-selective IR multiphoton dissociation of methyl isopropyl ether C{sub 3}H{sub 7}OCH{sub 3} irradiated by a pulsed CO{sub 2} laser, was studied. The dissociation yields of both isotopic components ({beta}{sub 18} and {beta}{sub 16}) and the selectivity for the {sup 18}O isotope ({alpha} = {beta}{sub 18}/{beta}{sub 16}) were measured as functions of laser radiation frequency, energy fluence, and ether partial pressure. At a laser radiation wavenumber of 1041.3 cm{sup {minus}1}, the dissociation yields and selectivities attain the values {beta}{sub 18} = 3.5%, {alpha}(18/16) = 25 and {beta}{sub 18} = 6.5%, {alpha}(18/16) = 16 at energy fluences of 3.0 and 3.5 J/cm{sup 2}, respectively. Methanol and acetaldehyde are the main detectable oxygen-containing products of C{sub 3}H{sub 7}OCH{sub 3} dissociation, thus testifying that this molecule dissociates by at least two pathways.

• OSTI ID: 75736
• Journal Information: High Energy Chemistry, Journal Name: High Energy Chemistry Journal Issue: 2 Vol. 29; ISSN 0018-1439; ISSN HIECAP
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
DISSOCIATION
ETHERS
INFRARED RADIATION
LASER RADIATION
OXYGEN 16
OXYGEN 18
PHOTOCHEMICAL REACTIONS