scholarly journals Electronic States ofp-Benzoquinone. IV. Infrared Spectrum and Assignment of Vibrational Frequencies in the Ground Electronic State

1958 ◽  
Vol 31 (6) ◽  
pp. 734-739 ◽  
Author(s):  
Tosinobu Anno ◽  
Akira Sadô
Keyword(s):  
Infrared Spectrum ◽  
Electronic State ◽  
Electronic States ◽  
Vibrational Frequencies ◽  
Ground Electronic State

AN IMPROVED TECHNIQUE FOR THE OBSERVATION OF INFRARED CHEMILUMINESCENCE: RESOLVED INFRARED EMISSION OF OH ARISING FROM THE SYSTEM H + O2

1960 ◽  
Vol 38 (10) ◽  
pp. 1742-1755 ◽  
Author(s):  
P. E. Charters ◽  
J. C. Polanyi
Keyword(s):  
Infrared Spectrum ◽  
Electronic State ◽  
Vibrational Temperature ◽  
Infrared Emission ◽  
Multiple Reflection ◽  
Ground Electronic State ◽  
Oh Radicals ◽  
Vibrationally Excited ◽  
Improved Technique ◽  
First Time

A multiple reflection apparatus for the observation of infrared chemiluminescence is described. By means of this apparatus infrared emission from the system H + O2 has been identified as being due to vibrationally excited OH radicals in levels v = 1, 2, and 3 of the ground electronic state. The resolved infrared spectrum of the OH fundamental has been observed for the first time without interference from other emission. The most likely source of excited OH is the reaction H + HO2 → OH† + OH. The vibrational 'temperature' of OH† (vibrationally excited OH in its ground electronic state) in our system is in the region of TV = 2240 °K. These findings are discussed in relation to Krassovsky's suggestion that reaction between H and O2 could account for the Meinel hydroxyl bands in the night sky.

scholarly journals Precision measurement of the fundamental vibrational frequencies of tritium-bearing hydrogen molecules: T2, DT, HT

2020 ◽  
Vol 22 (16) ◽  
pp. 8973-8987 ◽  
Author(s):  
K.-F. Lai ◽  
V. Hermann ◽  
T. M. Trivikram ◽  
M. Diouf ◽  
M. Schlösser ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
High Resolution ◽  
Electronic State ◽  
Precision Measurement ◽  
Molecular Hydrogen ◽  
Vibrational Frequencies ◽  
Ground Electronic State ◽  
Hydrogen Molecules ◽  
Coherent Raman

High-resolution coherent Raman spectroscopy of all three tritium-containing molecular hydrogen – T2, DT and HT – were performed to determine the ground electronic state fundamental Q-branch transition frequencies at accuracies of 0.0005 cm−1.

The a″ vibrations of singlet propynal

1993 ◽  
Vol 71 (10) ◽  
pp. 1556-1561 ◽  
Author(s):  
J.K.G. Watson
Keyword(s):  
Electronic State ◽  
Band System ◽  
Excited Electronic State ◽  
Vibrational Frequencies ◽  
Ground Electronic State ◽  
Harmonic Potential

The a″ vibrational frequencies of all possible H and D isotopomers of propynal (HCCCHO) are shown to allow two solutions for the a″ harmonic potential constants. Equations relating the solutions are given. In the [Formula: see text] ground electronic state one solution can be rejected as chemically unrealistic, but in the [Formula: see text] excited electronic state the choice is more difficult. It is shown that a choice can be made on the basis of the observed cross-sequence intensities in the [Formula: see text] band system.

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