Vibration–rotation spectra of nitrous acid, HONO

1985 ◽  
Vol 63 (7) ◽  
pp. 962-965 ◽  
Author(s):  
C. M. Deeley ◽  
I. M. Mills ◽  
L. O. Halonen ◽  
J. Kauppinen
Keyword(s):  
Fourier Transform ◽  
Excited State ◽  
Standard Deviation ◽  
High Resolution ◽  
Infrared Spectra ◽  
Ground State ◽  
Nitrous Acid ◽  
Vibration Rotation ◽  
Line Positions ◽  
Better Than

High-resolution Fourier-transform infrared spectra have been recorded and analyzed for the ν4 ν5, and ν6 fundamental bands of trans-HONO, and for the ν4 fundamental of cis-HONO. The spectral resolution was better than 0.01 cm−1, and the rotational structure has been analyzed to give improved ground-state and excited-state rotational constants, with a standard deviation of the fit to the observed line positions of around 0.0006 cm−1. Two Coriolis interactions have been analyzed between the ν5 and ν6 bands of trans-HONO.

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.

Vibrational Spectra and Force Constants of Symmetric Tops, XLIII [1] Fourier Transform Infrared Spectra of Monoisotopic H3GeBr Species in the ν1/ν4 and ν6 Region

1984 ◽  
Vol 39 (9) ◽  
pp. 871-879 ◽  
Author(s):  
H. Bürger ◽  
R. Eujen ◽  
A. Rahner ◽  
P. Schulz ◽  
S. Cradock
Keyword(s):  
Fourier Transform ◽  
Excited State ◽  
Infrared Spectra ◽  
Vibrational Spectra ◽  
Ground State ◽  
Fourier Transform Infrared ◽  
Force Constants ◽  
Fourier Transform Infrared Spectra ◽  
Weakly Coupled

Fourier transform infrared spectra of the monoisotopic species H374Ge79Br and H374Ge81Br have been recorded in the ν1/ν4 region near 2100 cm-1 with a resolution of 0.015 cm-1 and in the ν6 and 2 ν6 regions near 580 and 1150 cm-1 with a resolution of 0.04 cm-1. Rotational analyses based on ~ 1500, ~1100 and ~ 300 data of ν1/ν4, ν6 and 2 ν6 respectively for each isotopomer have been performed, and ground state and excited state vibrational, rotational and rovibrational parameters have been determined, ν1, 2115.815 0(2)/2115.813 4(2) cm-1, and ν4, 2126.016 5(1) 2126.016 7(1) cm-1 (H374Ge79Br/H374Ge81Br), are weakly coupled by Coriolis x, y resonance, ζ1,4 ≃ - 0.021. ν6, 577.601 2(4)/577.541 7(4) cm-1, and ν4 are affected by / (±2, ±2) resonance. Furthermore, the hot bands (ν1+ν3)-ν3, (ν3+ν4)-ν3, (ν3+ν6)-ν3, 2ν6±2 - ν6±2 and 2ν06 - ν6±1 have been detected and analyzed.

High Resolution IR-Spectra of Furane and Thiophene

1993 ◽  
Vol 48 (12) ◽  
pp. 1193-1202 ◽  
Author(s):  
B. Pankoke ◽  
K. M. T. Yamada ◽  
G. Winnewisser
Keyword(s):  
Fourier Transform ◽  
High Resolution ◽  
Ground State ◽  
Fourier Transform Spectrometer ◽  
Laser Spectrometer ◽  
Diode Laser Spectrometer ◽  
Out Of Plane ◽  
The University ◽  
Line Positions ◽  
Microwave Data

Åbstract The spectra of the out-of-plane fundamental band of furane (C4H4O) centered at 744 cm -1 and of thiophene (C4H4S) at 712 cm -1 were measured in Doppler-limited resolution with a diode-laser spectrometer at Köln and with a high-resolution Fourier transform spectrometer at the University of Gießen. An interactive Loomis-Wood program was applied to identify the c-type transitions of furane and thiophene. The molecular parameters were determined from the observed line positions and the available microwave data by least-squares-fits using Watson's A-reduced Hamiltonian. Some relations among parameters appearing in different formulations of the Hamiltonian are represented explicitly in connection with the derivation of the unreduced constants. The unreduced constants were derived for both molecules using the planarity relations. We determined the inertial defects to be ≈ 0.05 amuÅ 2 in the ground state and ≈ -0.2 amuÅ 2 in the excited state for both furane and thiophene.

Le niveau de base du silane obtenu à partir de l'étude du spectre à transformée de Fourier de ν2 et ν4

1984 ◽  
Vol 62 (3) ◽  
pp. 254-259 ◽  
Author(s):  
G. Pierre ◽  
A. Valentin ◽  
L. Henry
Keyword(s):  
Fourier Transform ◽  
Standard Deviation ◽  
Ground State ◽  
Excited Level ◽  
Experimental Spectrum ◽  
Fourier Transform Spectrometer ◽  
Apparatus Function ◽  
Vibration Rotation ◽  
The Fourier Transform ◽  
Rotation Spectrum

We have recorded a vibration–rotation spectrum of 28SiH4 from 840 to 1040 cm−1 with a Fourier transform spectrometer operating with an apparatus-function width of 2 × 10−3 cm−1. An analysis of microwave transitions and 919 combination differences between two different ground state levels and an excited level belonging to the band ν2 or ν4 have been used to determine the value of the ground state constants as expressed in a sixth-order Hamiltonian development. The experimental spectrum needed was recorded with the Fourier transform spectrometer of the Laboratoire de Spectronomie Moléculaire de Paris. The experimental precision is about 0.0001 cm−1. The calculation reproduces these 919 differences with a standard deviation of 0.00019 cm−1.

The infrared emission spectra of LiF and HF

1991 ◽  
Vol 69 (11) ◽  
pp. 1659-1671 ◽  
Author(s):  
H. G. Hedderich ◽  
C. I. Frum ◽  
R. Engleman Jr. ◽  
P. F. Bernath
Keyword(s):  
Fourier Transform ◽  
High Resolution ◽  
Infrared Spectrum ◽  
Key Words ◽  
Infrared Spectra ◽  
Ground State ◽  
Emission Spectra ◽  
Infrared Emission ◽  
Vibrational Ground State ◽  
J 13

The high resolution infrared spectrum of LiF has been measured in emission with the McMath Fourier transform interferometer at Kitt Peak. A total of 800 lines with ν = 1 → 0 to ν = 8 → 7 of the main isotopomer, 7LiF, and 250 lines with ν = 1 → 0 to ν = 3 → 2 of the minor isotopomer, 6LiF, were observed. These ro-vibrational transitions and the pure rotational transitions from the literature were fit to a set of Dunham coefficients Yij and a set of mass-reduced Dunham coefficients Uij. The same spectrum shows 13 pure rotational emission transitions of HF in the vibrational ground state with J = 13 → 12 to J = 25 → 24. These transitions were used to determine an improved set of rotational constants for HF. Key words: infrared spectra, LiF, HF.

scholarly journals Preliminary validation of column-averaged volume mixing ratios of carbon dioxide and methane retrieved from GOSAT short-wavelength infrared spectra

2011 ◽  
Vol 4 (6) ◽  
pp. 1061-1076 ◽  
Author(s):  
I. Morino ◽  
O. Uchino ◽  
M. Inoue ◽  
Y. Yoshida ◽  
T. Yokota ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Fourier Transform ◽  
Standard Deviation ◽  
High Resolution ◽  
Infrared Spectra ◽  
Short Wavelength ◽  
Total Carbon ◽  
Infrared Observation ◽  
Mixing Ratios ◽  
Preliminary Validation

Abstract. Column-averaged volume mixing ratios of carbon dioxide and methane retrieved from the Greenhouse gases Observing SATellite (GOSAT) Short-Wavelength InfraRed observation (GOSAT SWIR XCO2 and XCH4) were compared with the reference calibrated data obtained by ground-based high-resolution Fourier Transform Spectrometers (g-b FTSs) participating in the Total Carbon Column Observing Network (TCCON). Preliminary results are as follows: the GOSAT SWIR XCO2 and XCH4 (Version 01.xx) are biased low by 8.85 ± 4.75 ppm (2.3 ± 1.2 %) and 20.4 ± 18.9 ppb (1.2 ± 1.1 %), respectively. The standard deviation of the GOSAT SWIR XCO2 and XCH4 is about 1 % (1 σ) after correcting the negative biases of XCO2 and XCH4 by 8.85 ppm and 20.4 ppb, respectively. The latitudinal distributions of zonal means of the GOSAT SWIR XCO2 and XCH4 show similar features to those of the g-b FTS data except for the negative biases in the GOSAT data.

Ground state molecular parameters of phosphine, PH3, from the simultaneous analysis of the high-resolution infrared, microwave and submillimeterwave spectra

1985 ◽  
Vol 50 (11) ◽  
pp. 2480-2492 ◽  
Author(s):  
Soňa Přádná ◽  
Dušan Papoušek ◽  
Jyrki Kauppinen ◽  
Sergei P. Belov ◽  
Andrei F. Krupnov ◽  
...  
Keyword(s):  
Fourier Transform ◽  
High Resolution ◽  
Ground State ◽  
Unitary Transformation ◽  
Point Of View ◽  
Acoustic Detection ◽  
Molecular Parameters ◽  
Microwave Spectrometer ◽  
Fourier Transform Spectra ◽  
First Time

Fourier transform spectra of the ν2 band of PH3 have been remeasured with 0.0045 cm-1 resolution. Ground state combination differences from these data have been fitted simultaneously with the microwave and submillimeterwave data to determine the ground state spectroscopical parameters of PH3 including the parameters of the Δk = ± 3n interactions. The correlation between the latter parameters has been discussed from the point of view of the existence of two equivalent effective rotational operators which are related by a unitary transformation. The ΔJ = 0, +1, ΔK = 0 (A1 ↔ A2, E ↔ E) rotational transitions in the ν2 and ν4 states have been measured for the first time by using a microwave spectrometer and a radiofrequency spectrometer with acoustic detection.

High-resolution Fourier-transform infrared spectroscopy of the Coriolis coupled ground state and ν7 mode of ketenimine

2011 ◽  
Vol 134 (23) ◽  
pp. 234306 ◽  
Author(s):  
Michael K. Bane ◽  
Evan G. Robertson ◽  
Christopher D. Thompson ◽  
Chris Medcraft ◽  
Dominique R. T. Appadoo ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
High Resolution ◽  
Fourier Transform Infrared Spectroscopy ◽  
Ground State ◽  
Fourier Transform Infrared

High Resolution Infrared Spectra of the ν2 and 2ν1 Bands of 14N16O2

1975 ◽  
Vol 53 (19) ◽  
pp. 1902-1926 ◽  
Author(s):  
Aldée Cabana ◽  
Michel Laurin ◽  
Walter J. Lafferty ◽  
Robert L. Sams
Keyword(s):  
High Resolution ◽  
Infrared Spectra ◽  
Ground State ◽  
Equilibrium Structure ◽  
Coriolis Interaction ◽  
Rotational Constants ◽  
Average Structures

The infrared spectra of two B type bands, ν2 and 2ν1, of 14N16O2 have been recorded under high resolution. Ground state combination differences from these bands have been combined with combination differences obtained in previous studies and eight pure rotational microwave transitions to yield improved ground state rotational constants. Upper state constants and band centers for the ν2 and 2ν1 bands are also reported. The 2ν1 band contains internal intensity anomalies believed to arise from a weak Coriolis interaction with the much stronger ν1 + ν3 band. Equilibrium rotational constants have been calculated. The equilibrium structure of the molecule is: rc = 1.1945 ± 0.0005 Å and Θc = 133.85 ± 0.10°. For the sake of comparison, effective, substitution, and average structures are also reported.

Sign in / Sign up

Export Citation Format

Share Document