The 10- and 20-?m interstellar absorption bands: Comparison with the infrared spectrum of the Nogoya meteorite

1979 ◽  
Vol 60 (2) ◽  
pp. 297-304 ◽  
Author(s):  
C. Friedemann ◽  
J. G�rtler ◽  
J. Dorschner
Keyword(s):  
Infrared Spectrum ◽  
Absorption Bands ◽  
Interstellar Absorption

Origin of the Diffuse Interstellar Absorption Bands

Nature ◽  
1968 ◽  
Vol 218 (5137) ◽  
pp. 153-153 ◽  
Author(s):  
W. W. DULEY
Keyword(s):  
Absorption Bands ◽  
Interstellar Absorption

Gaseous infrared spectra of the simplest geminal diol CH2(OH)2 and the isotopic analogues in the hydration of formaldehyde

2021 ◽  
Author(s):  
Hung-Yang Jain ◽  
Chih-Tsun Yang ◽  
Li-Kang Chu
Keyword(s):  
Infrared Spectrum ◽  
Infrared Spectra ◽  
Absorption Bands ◽  
Geminal Diol

The infrared spectrum of the simplest geminal diol, methanediol or methylene glycol (CH2(OH)2), was successfully probed in the gaseous hydration of formaldehyde. The observed absorption bands coincided with the anharmonic...

Interstellar absorption lines in the infrared spectrum of NGC 2024 IRS 2

1984 ◽  
Vol 279 ◽  
pp. 673 ◽  
Author(s):  
J. H. Black ◽  
S. P. Willner
Keyword(s):  
Infrared Spectrum ◽  
Absorption Lines ◽  
Interstellar Absorption

scholarly journals Optical and Chemical Studies on Simulated Interstellar Grain Materials

1973 ◽  
Vol 52 ◽  
pp. 327-333
Author(s):  
J. D. McCullough ◽  
G. R. Floyd ◽  
R. H. Prince ◽  
W. W. Duley
Keyword(s):  
Wavelength Range ◽  
Absorption Bands ◽  
Interstellar Absorption ◽  
Interstellar Grains ◽  
Chemical Studies ◽  
Radiation Induced ◽  
Absorption Features ◽  
Important Constituent

The possibility that many different diffuse interstellar absorption features may be produced by the same type of absorbing atom in different hydrocarbon matrices on interstellar grains has been examined experimentally. The present study shows that absorption bands due to Na atoms in various hydrocarbon matrices can occur within the wavelength range 5400–5800 Å. A study of the molecules generated from the radiation-induced polymerization of C2H2 at 55 K is also reported. It is shown that C6H6 is an abundant product of this polymerization and may therefore be an important constituent of interstellar grains.

THE INFRARED SPECTRUM AND THERMAL DECOMPOSITION OF HYDRAZINE PERCHLORATE HEMIHYDRATE

1966 ◽  
Vol 44 (20) ◽  
pp. 2435-2443 ◽  
Author(s):  
P. W. M. Jacobs ◽  
A. Russell-Jones
Keyword(s):  
Infrared Spectrum ◽  
Reaction Mechanisms ◽  
Low Temperatures ◽  
Room Temperature ◽  
Kcal Mole ◽  
Absorption Bands ◽  
Kinetics Of Decomposition ◽  
Salt Melts ◽  
Chemical Equation ◽  
Kinetics Of

The infrared spectrum of hydrazine perchlorate hemihydrate (HPH) has been determined and an assignment of the absorption bands made. Invacuo, HPH will partially dehydrate even at room temperature; when heated the remainder of the half-mole of water is lost at 61 °C. The dehydrated salt melts at 138 °C and decomposition ensues. The kinetics of decomposition may be followed in the temperature range 180–280 °C. The activation energy is 36.3 kcal/mole. At low temperatures the decomposition is represented by the chemical equation[Formula: see text]but when the temperature is high enough the rate of decomposition of the ammonium perchlorate formed becomes appreciable also. Possible reaction mechanisms are discussed.

Origin of the diffuse interstellar absorption bands

1977 ◽  
Vol 47 (1) ◽  
pp. 185-193 ◽  
Author(s):  
W. W. Duley
Keyword(s):  
Absorption Bands ◽  
Interstellar Absorption

Detection of the Methoxyl Group by Infrared Spectroscopy

1968 ◽  
Vol 22 (3) ◽  
pp. 164-166 ◽  
Author(s):  
I. A. Degen
Keyword(s):  
Infrared Spectroscopy ◽  
Amino Acid ◽  
Infrared Spectrum ◽  
Potassium Bromide ◽  
Methoxyl Group ◽  
Absorption Bands ◽  
Weak Band ◽  
Heterocyclic Molecules ◽  
Methoxy Substituent ◽  
Carboxylic Esters

Methoxy compounds, including methyl carboxylic esters, exhibit a weak band in the 2860–2800 cm−1 region of the infrared spectrum, which is diagnostic for the methoxyl group. The band occurs at a lower frequency than that of the main C—H absorption. The potassium bromide disk technique is satisfactory for solid methoxy compounds. Aldehydes, amino acid hydrochlorides, nitrogen heterocyclic molecules and N-methyl amines exhibit absorption bands which may overlap this region and the detection of a methoxy substituent for these classes of compound may be less precise.

Detection of two interstellar absorption bands coincident with spectral features of C60+

Nature ◽  
1994 ◽  
Vol 369 (6478) ◽  
pp. 296-298 ◽  
Author(s):  
B. H. Foing ◽  
P. Ehrenfreund
Keyword(s):  
Spectral Features ◽  
Absorption Bands ◽  
Interstellar Absorption
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