The absorption spectrum of trans-diimide (N2H2) in the vacuum ultraviolet region

1981 ◽  
Vol 59 (3) ◽  
pp. 506-517 ◽  
Author(s):  
P. S. Neudorfl ◽  
R. A. Back ◽  
A. E. Douglas
Keyword(s):  
Absorption Spectrum ◽  
Gas Phase ◽  
Vacuum Ultraviolet ◽  
Singlet State ◽  
Ultraviolet Region ◽  
Ultraviolet Absorption Spectrum ◽  
Rotational Analysis ◽  
Trans Conformation ◽  
Vacuum Ultraviolet Region ◽  
Rydberg Transitions

The vacuum ultraviolet absorption spectrum of trans-diimide (N2H2) in the gas phase has been re-examined between 1800 and 1300 Å, using diimide prepared by the thermal decomposition of sodium tosylhydrazide. Two band systems were observed, designated [Formula: see text] and [Formula: see text], with origins at 1727 and 1473 Å, which have been assigned to the Rydberg transitions 3pπ(bu) ← n+ and 4pπ(bu) ← n+ respectively. Both systems show long progressions in v2′, the N—N—H symmetric bending frequency, and short progressions in v3′, the symmetric N—N stretching frequency.The [Formula: see text] system has well-resolved rotational J type structure in some bands, and the rotational analysis showed that the ground state is a totally symmetric singlet state of C2h symmetry (planar trans-N2H2 isomer), and that the system arises from a 1Bu ← 1Ag transition. Rotational constants obtained for the 0–0 band of the [Formula: see text]-state were A = 15.63, B = 1.32, and C = 1.22 cm−1, and the values of rH−N = 1.028 Å, rH−N = 1.167 Å, and [Formula: see text] were estimated from them assuming a planar trans conformation.

Photofragmentation of gas-phase acetic acid and acetamide clusters in the vacuum ultraviolet region

2017 ◽  
Vol 147 (19) ◽  
pp. 194302 ◽  
Author(s):  
Marta Berholts ◽  
Hanna Myllynen ◽  
Kuno Kooser ◽  
Eero Itälä ◽  
Sari Granroth ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Gas Phase ◽  
Vacuum Ultraviolet ◽  
Ultraviolet Region ◽  
Vacuum Ultraviolet Region

The absorption spectrum of Cl2 in the vacuum ultraviolet

1981 ◽  
Vol 59 (6) ◽  
pp. 835-840 ◽  
Author(s):  
A. E. Douglas
Keyword(s):  
Absorption Spectrum ◽  
Vacuum Ultraviolet ◽  
Band System ◽  
Rydberg States ◽  
Ultraviolet Region ◽  
Isotopic Molecule ◽  
Vacuum Ultraviolet Region ◽  
Vibrational Constants ◽  
Made In

The absorption spectrum of Cl2 in the vacuum ultraviolet region has been photographed with sufficient resolution to allow rotational analyses of many bands. The separated isotopic molecule 35Cl2 and cooled absorption cells were used to simplify the spectrum. A band system associated with an ionic state has been observed in the 1330–1450 Å range. Many large perturbations in the system prevent the determination of the usual rotational and vibrational constants. Some progress has been made in the analyses of a few bands associated with Rydberg states.

Absorption spectrum of vapor phase azulene in vacuum ultraviolet region

1966 ◽  
Vol 19 (1-4) ◽  
pp. 1-3 ◽  
Author(s):  
Taiji Kitagawa ◽  
Yoshiya Harada ◽  
Hiroo Inokuchi ◽  
Kumasaburo Kodera
Keyword(s):  
Absorption Spectrum ◽  
Vapor Phase ◽  
Vacuum Ultraviolet ◽  
Ultraviolet Region ◽  
Vacuum Ultraviolet Region

THE ABSORPTION SPECTRUM OF DBr IN THE VACUUM ULTRAVIOLET REGION

1962 ◽  
Vol 40 (10) ◽  
pp. 1279-1293 ◽  
Author(s):  
J. G. Stamper
Keyword(s):  
Absorption Spectrum ◽  
Vacuum Ultraviolet ◽  
High Dispersion ◽  
Ultraviolet Region ◽  
Isotopic Species ◽  
Vacuum Ultraviolet Region ◽  
The Relationship

The absorption spectrum of DBr has been photographed under high dispersion in the vacuum ultraviolet region. More than 30 bands have been observed and rotational analyses have been obtained for most of them. As is the case for HBr, little regularity is to be found among the various bands and the relationship between the spectra of the two isotopic species is frequently unclear. It has therefore not proved possible to arrive at any detailed conclusions as to the nature of the upper states of the bands.

Absorption spectrum and absorption coefficients of NO2 in the vacuum ultraviolet region

1978 ◽  
Vol 56 (7) ◽  
pp. 962-973 ◽  
Author(s):  
Yumio Morioka ◽  
Harunobu Masuko ◽  
Masatoshi Nakamura ◽  
Michio Sasanuma ◽  
Eiji Ishiguro
Keyword(s):  
Absorption Spectrum ◽  
Vacuum Ultraviolet ◽  
Rydberg States ◽  
Ultraviolet Region ◽  
Photographic Method ◽  
Rydberg Series ◽  
Absorption Coefficients ◽  
Electron Synchrotron ◽  
Ionic State ◽  
Vacuum Ultraviolet Region

The absorption coefficients of NO2 in the region from 500 to 1100 Å are measured by a photographic method using the radiation from electron synchrotron as a background source. For the Rydberg series due to the transition from 4a1 to npπ, parameters q and Γ in Mies equation are obtained and the parameter q is determined to be −0.4 for every member and Γ 4.808/n*3 eV where n* is the effective quantum number.The absorption spectrum of NO2 in the region from 600 to 1600 Å are also analyzed. New vibrational progressions that are observed around 950 Å, are assigned to the excitations from 4b2 to ns Rydberg states (n = 3, 4, and 5) converging to the 1B2 ionic state. Assignments and discussions of many other Rydberg series that appear in the absorption spectrum between 600 and 1600 Å are also presented.

Absorption Spectrum of Se I in the Vacuum Ultraviolet Region

1983 ◽  
Vol 27 (1) ◽  
pp. 59-63 ◽  
Author(s):  
A M Cantú ◽  
M Mazzoni ◽  
Y N Joshi
Keyword(s):  
Absorption Spectrum ◽  
Vacuum Ultraviolet ◽  
Ultraviolet Region ◽  
Vacuum Ultraviolet Region

Rotational analysis of the forbidden d3 Δi ← X1Σ+ absorption bands of carbon monoxide

1970 ◽  
Vol 48 (24) ◽  
pp. 3004-3015 ◽  
Author(s):  
G. Herzberg ◽  
T. J. Hugo ◽  
S. G. Tilford ◽  
J. D. Simmons
Keyword(s):  
Carbon Monoxide ◽  
High Resolution ◽  
Intensity Distribution ◽  
Vacuum Ultraviolet ◽  
Ultraviolet Region ◽  
Rotational Analysis ◽  
Absorption Bands ◽  
Local Perturbations ◽  
Vacuum Ultraviolet Region ◽  
Π State

The forbidden d3Δi–X1Σ+ transition of CO has been observed in absorption at high resolution in the vacuum ultraviolet region. The intensity distribution in the rotational structure of the observed bands is in conformity with the assumption that the transition occurs on account of the interaction between the d3Δ state and a 1Π state, presumably the A1Π state. Thirteen bands of the d–X system have been analyzed yielding more extensive rotational data for the d3Δi state than were previously known. A discussion of the local perturbations in the d state by the A1Π and a3Π states is included.

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