Laser magnetic resonance study of the gas phase reactions of OH with CO, NO, and NO2

1974 ◽  
Vol 61 (5) ◽  
pp. 1943-1952 ◽  
Author(s):  
Carleton J. Howard ◽  
K. M. Evenson
Keyword(s):  
Magnetic Resonance ◽  
Gas Phase ◽  
Magnetic Resonance Study ◽  
Gas Phase Reactions ◽  
Laser Magnetic Resonance

The infrared spectrum of FeH2, studied in the gas phase by laser magnetic resonance

1999 ◽  
Vol 110 (8) ◽  
pp. 3861-3869 ◽  
Author(s):  
Helga Körsgen ◽  
Wolfgang Urban ◽  
John M. Brown
Keyword(s):  
Magnetic Resonance ◽  
Infrared Spectrum ◽  
Gas Phase ◽  
Laser Magnetic Resonance

scholarly journals Far Infrared Laser Magnetic Resonance Spectroscopy

1980 ◽  
Vol 87 ◽  
pp. 239-245
Author(s):  
K. M. Evenson ◽  
R. J. Saykally
Keyword(s):  
Magnetic Resonance ◽  
Gas Phase ◽  
Far Infrared ◽  
Molecular Ions ◽  
Resonance Spectroscopy ◽  
Transient Species ◽  
Molecular Electronic ◽  
Rotational Spectra ◽  
Domain Of Applicability ◽  
Laser Magnetic Resonance

Within the last few years, laser magnetic resonance (LMR) has emerged as a powerful technique for the study of pure rotational spectra of transient species in the gas phase. The sensitivity of this method is considerably higher than that of competing techniques, such as conventional optical and microwave spectroscopy and gas-phase EPR, while the resolution attainable is comparable with that of the latter two methods. Its domain of applicability presently includes atoms, ground states of molecules with up to 5 atoms, and most recently, metastable molecular electronic states in the millisecond lifetime range, and molecular ions. The only rigorous constraint on this applicability is that the species of interest must be paramagnetic.

Comparative Study of the Reactions of 16OH and 18OH with H16O2.

1987 ◽  
Vol 42 (5) ◽  
pp. 471-476 ◽  
Author(s):  
P. Dransfeld ◽  
H. Gg. Wagner
Keyword(s):  
Gas Phase ◽  
Room Temperature ◽  
Control Experiment ◽  
Flow Reactor ◽  
Branching Ratio ◽  
Far Infrared ◽  
Absolute Rate ◽  
Gas Phase Reactions ◽  
Absolute Rate Constant ◽  
Laser Magnetic Resonance

The gas phase reactions18OH + H16O2 → H218O + 16O2 (1a)18OH + H16O2 → 16OH + H18O16O (1b)were studied at room temperature in a discharge flow reactor with far infrared laser magnetic resonance (LMR) detection of 16OH, 18OH and H16O16O. The formation of 16OH in the course of the reaction was observed. The absolute rate constant for the overall removal of 18OH in excess of H16O16O was determined. Each run was accompanied by a control experiment replacing the initial 18OH by the same amount of 16OH. From these experiments a branching ratio is obtained ofk1a/( k1a + k1b) = 0.52 ± 0.08

Laser magnetic resonance spectrum of 13CH2 around 11 µm: determination of 13C hyperfine interactions and ν2 isotope shift for methylene

1983 ◽  
Vol 61 (3) ◽  
pp. 480-488 ◽  
Author(s):  
A. R. W. McKellar ◽  
Trevor J. Sears
Keyword(s):  
Magnetic Resonance ◽  
Gas Phase ◽  
Isotope Shift ◽  
Microwave Discharge ◽  
Resonance Spectrum ◽  
Hyperfine Interactions ◽  
Fermi Contact ◽  
Laser Magnetic Resonance ◽  
Good Agreement

Ten rotation–vibration transitions of the ν2 (bending) fundamental band of 13CH2 have been observed using the technique of CO2 laser magnetic resonance in the 880 to 945 cm−1 region. 13C substituted methylene was produced in a flow system by reacting 13CH4 or 13CH2CO with F atoms from a microwave discharge in CF4. Analysis of the spectra yields a number of molecular parameters for 13CH2. Specifically, the 13C isotope shift of ν2 is −3.93 cm−1 and the 13C Fermi contact hyperfine parameter is 238 ± 6 MHz for the ground vibrational state. The hyperfine parameters determined here for gas phase 13CH2 are in fairly good agreement with those determined for matrix isolated 13CD2 in earlier ESR experiments.

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