Synthesis of Hydrogen Polyoxides H2O4 and H2O3 and Their Characterization by Raman Spectroscopy

2011 ◽  
Vol 2011 (33) ◽  
pp. 5144-5150 ◽  
Author(s):  
Alexander V. Levanov ◽  
Dmitri V. Sakharov ◽  
Anna V. Dashkova ◽  
Ewald E. Antipenko ◽  
Valeri V. Lunin
Keyword(s):  
Raman Spectroscopy ◽  
Hydrogen Polyoxides

Studies on Hydrogen–Oxygen Systems in the Electrical Discharge. VI. Detection by Laser Raman Spectroscopy of O2 and O3 Trapped at 80 °K

1973 ◽  
Vol 51 (10) ◽  
pp. 1525-1529 ◽  
Author(s):  
José L. Arnau ◽  
Paul A. Giguère
Keyword(s):  
Raman Spectroscopy ◽  
Flow System ◽  
Laser Raman Spectroscopy ◽  
Experimental Conditions ◽  
Desorption Process ◽  
Laser Raman ◽  
Segregation Effect ◽  
Trapped Gases ◽  
Hydrogen Polyoxides

Further study by Raman spectroscopy of the condensed products from electrically dissociated water vapor and other related systems has revealed the presence, not only of ozone in appreciable amounts, but also of molecular oxygen in still greater amounts trapped at 80 °K. The concentration of ozone relative to the hydrogen oxides varied somewhat with experimental conditions, and also locally due to some segregation effect in the glassy condensate. The concentration of trapped oxygen showed still wider fluctuations depending particularly on surface effects in the discharge–flow system. On warming up under vacuum the intensity of the O2 and O3 bands began to decrease even before the crystallization temperature was reached (about 150 °K), thereby confirming that the gas evolution at that stage is mainly a desorption process. Therefore, the often quoted ratio of total evolved O2 to residual H2O2 could not be a reliable index of the formation of hydrogen polyoxides, H2O3 and H2O4, in these systems. A mechanism is proposed for the formation in situ of the trapped gases and in particular, for a source of oxygen atoms in dissociated water vapor.The fundamental vibrations of the ozone molecule, ν1 = 1106, ν2 = 703, and ν3 = 1036 cm−1, were confirmed by polarization and isotope shift measurements.

Studies on Hydrogen–Oxygen Systems in the Electrical Discharge. V. Raman Spectra of the Trapped Products

1971 ◽  
Vol 49 (13) ◽  
pp. 2242-2247 ◽  
Author(s):  
Xavier Deglise ◽  
Paul A. Giguère
Keyword(s):  
Hydrogen Peroxide ◽  
Raman Spectroscopy ◽  
Water Vapor ◽  
Electrical Discharge ◽  
Amorphous Matrix ◽  
Total Reflection ◽  
Laser Raman Spectroscopy ◽  
Laser Raman ◽  
New Type ◽  
Hydrogen Polyoxides

The condensed products (at – 180 °C) of electrically dissociated water vapor and other related systems were examined by means of laser Raman spectroscopy. A new type of total reflection cell had to be developed for the study of metastable species trapped in an amorphous matrix. Besides the characteristic O—O stretching band of hydrogen peroxide at 878 cm−1, always the strongest, another fairly strong band at 500 cm−1, and a third one at about 760 cm−1 were present in all cases. A couple of weaker bands around 820–830 cm−1 and 430–440 cm−1 occurred only in oxygen-rich system (H2O2 vapor or H2O–O2 mixtures). In the latter, the presence of condensed ozone was confirmed by a band at 1025 cm−1, and occasionally another faint one around 1120 cm−1.The relative intensities of the bands varied locally in a given sample, indicating uneven composition.Isotopic shifts with 18O confirmed that these Raman bands arise from vibrations of oxygen atoms. Essentially the same results were obtained in hydrogen as in deuterium systems, except that in the latter case the new bands were appreciably stronger and sharper. The present results support the assignment of previous infrared spectra to hydrogen polyoxides, H2O3 and H2O4.

Raman spectroscopy and X-ray diffraction of lithium niobate at temperatures up to 1300○-4.80pt○C

2005 ◽  
Vol 126 ◽  
pp. 101-105 ◽  
Author(s):  
B. Moulin ◽  
L. Hennet ◽  
D. Thiaudière ◽  
P. Melin ◽  
P. Simon
Keyword(s):  
Raman Spectroscopy ◽  
Lithium Niobate ◽  
X Ray Diffraction ◽  
X Ray

Raman spectroscopy using a gas laser

1965 ◽  
Vol 26 (11) ◽  
pp. 620-626 ◽  
Author(s):  
J.P. Russell
Keyword(s):  
Raman Spectroscopy ◽  
Gas Laser

OBSERVATION OF PRETRANSITIONAL EFFECTS ON THE SHAPE OF THE E2 (17 cm-1 ) OPTICAL MODE IN β-Ag1 BY RAMAN SPECTROSCOPY

1981 ◽  
Vol 42 (C6) ◽  
pp. C6-776-C6-778
Author(s):  
E. Cazzanelli ◽  
A. Fontana ◽  
G. Mariotto ◽  
F. Rocca ◽  
M. P. Fontana
Keyword(s):  
Raman Spectroscopy ◽  
Optical Mode

RAMAN SPECTROSCOPY IN GUIDED OPTICAL WAVES

1983 ◽  
Vol 44 (C10) ◽  
pp. C10-501-C10-503 ◽  
Author(s):  
J. D. Swalen ◽  
J. F. Rabolt
Keyword(s):  
Raman Spectroscopy ◽  
Optical Waves

A POWERFUL TOOL TO STUDY COLLISIONAL PHENOMENA AND FOR COMBUSTION APPLICATIONS : THE HIGH RESOLUTION STIMULATED RAMAN SPECTROSCOPY

1987 ◽  
Vol 48 (C7) ◽  
pp. C7-761-C7-762
Author(s):  
B. LAVOREL ◽  
G. MILLOT ◽  
R. SAINT-LOUP ◽  
M. L. GONZE ◽  
J. SANTOS ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
High Resolution ◽  
Stimulated Raman
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