Vibration-rotation interactions between overtone and combination levels of asymmetric-top molecules: Application to the infrared spectroscopy of formaldehyde and ketene

2005 ◽  
Vol 122 (3) ◽  
pp. 034307 ◽  
Author(s):  
David M. Smith
Keyword(s):  
Infrared Spectroscopy ◽  
Asymmetric Top ◽  
Vibration Rotation

scholarly journals Infrared Spectroscopy of Molecules in Circumstellar Material

1980 ◽  
Vol 87 ◽  
pp. 515-524 ◽  
Author(s):  
Donald N. B. Hall
Keyword(s):  
Infrared Spectroscopy ◽  
High Resolution ◽  
Red Giants ◽  
Circumstellar Material ◽  
Long Period ◽  
Long Period Variables ◽  
Vibration Rotation ◽  
Very High

High resolution spectra of red giants and long period variables exhibit lines of infrared CO vibration-rotation bands arising in circumstellar material. In the few such stars so far observed at very high resolution (≲ 1 km/s) the circumstellar material appears localized in 3 distinct regimes with temperatures of 800K, 200K and 75K and expansion velocities of 0, 10 and 16 km/s rather than being uniformly distributed.

Vibration–rotation spectra of deuterated nitrous acid, DONO

1984 ◽  
Vol 62 (12) ◽  
pp. 1300-1305 ◽  
Author(s):  
L. O. Halonen ◽  
C. M. Deeley ◽  
I. M. Mills ◽  
V.-M. Horneman
Keyword(s):  
Fourier Transform ◽  
Standard Deviation ◽  
High Resolution ◽  
Infrared Spectra ◽  
Spectral Resolution ◽  
Nitrous Acid ◽  
Fourier Transform Infrared ◽  
Asymmetric Top ◽  
Vibration Rotation ◽  
Better Than

High-resolution Fourier transform infrared spectra have been recorded and analyzed for the ν3, ν4, ν5, and ν6 fundamental bands of trans-DONO, and for the ν4 fundamental of cis-DONO. The spectral resolution was better than 0.01 cm−1, and the bands have been fitted using an asymmetric top Hamiltonian with a standard deviation of around 0.0006 cm−1.

Asymmetric‐Top Vibration—Rotation Hamiltonians

1963 ◽  
Vol 38 (1) ◽  
pp. 8-17 ◽  
Author(s):  
K. T. Chung ◽  
Paul M. Parker
Keyword(s):  
Asymmetric Top ◽  
Vibration Rotation

Infrared Spectroscopy and Infrared Lasers in Air Pollution Research and Monitoring

1970 ◽  
Vol 24 (2) ◽  
pp. 161-174 ◽  
Author(s):  
Philip L. Hanst
Keyword(s):  
Air Pollution ◽  
Infrared Spectroscopy ◽  
Air Pollutants ◽  
Spectroscopic Methods ◽  
Infrared Lasers ◽  
Ir Laser ◽  
Pollution Research ◽  
Vibration Rotation

The use of spectroscopic methods in the analysis of the atmosphere is discussed. The special advantages of infrared vibration-rotation spectra for identification and measurement of air pollutants are emphasized. The capabilities of lasers in atmospheric work are reviewed, with particular attention being given to proposed methods of detecting pollutants by absorption of selected ir laser lines. Some commentary is presented on current and future atmospheric studies.

Millimetre-wave and submillimetre-wave spectroscopy of molecular ions

1988 ◽  
Vol 324 (1578) ◽  
pp. 147-162 ◽  
Keyword(s):  
Infrared Spectroscopy ◽  
Large Amplitude ◽  
Spectral Characteristics ◽  
Molecular Ions ◽  
Ionic Clusters ◽  
Millimetre Wave ◽  
Highly Sensitive ◽  
Asymmetric Top ◽  
Submillimetre Wave ◽  
Large Amplitude Motion

In the last few years, the specificities of millimetre-wave spectroscopy coupled with active developments in other fields ( ab initio calculation, radioastronomy and infrared spectroscopy) have led to an impressive increase in our knowledge of the spectral characteristics of molecular ions. The advances to be reviewed in this paper are a result of the development of highly sensitive spectrometers and of efficient methods of production. Some specific examples, including ions with large-amplitude motion (H 3 0 + ), weakly polar ions (HCNH + ), asymmetric-top ions (HCO+2, HON+2) and ionic clusters (Ar • H+3), will be used to illustrate the potentialities of millimetre- and submillimetre-wave spectroscopy.

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