Ultraviolet absorption of CS2 near the N2 laser wavelengths (3371 Å)

Jungen, Ch.; Malm, D. N.; Merer, A. J.

doi:10.1016/0009-2614(72)80278-1

Cited by 32 publications

(9 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3 It is thought that the second component 3 B2 is the S absorption system observed by J ungen et al 3 Ab initio calculations show that all other states are above 31 ()()() cm -1 except the 3 B2 state which correlates with the linear 3~: state. This state is expected to be between the ground X ~g+ state and the R 3A 2 state, but has never been observed.…”

Section: Inm)mentioning

confidence: 94%

“…4) 3 have already assigned the rotational levels of the 10 V. As the 10 Vand 15 Vexcitation bands have a particular importance in our work, we assigned the rotational levels of the 15 V band at room temperature.…”

Section: Absorption Band Of the Vapor Phase Csmentioning

confidence: 99%

“…It is well known that, from an energy of a few thousand cm -I, the vibrational levels of CS 2 are arranged in polyads. The states I VI ,vi 'V 3 ) and IVI -l,v 2 + 2 i ,V 3 ) of the polyad, defined by N = VI + v 2 /2 are coupled by a 1:2 Fermi resonance between the liJl symmetric stretching mode at 672 cm -I and the liJ 2 bending mode at 398 cm -I. The gap 2liJ 2 -liJl = 124 cm -I is not very small, but the coupling elements are of the same order of magnitude: 30 cm -I at 700 cm -I, 300 cm -I at 12000 cm -I.…”

Section: Dispersed Fluorescence Spectra From the 10 V And 15 Vbandmentioning

confidence: 99%

“…A particular coupling between adjacent polyads could be easily described in the effective Hamiltonian by a matrix element which couples the states IVI ,vLv 3 ) and…”

Section: Dispersed Fluorescence Spectra From the 10 V And 15 Vbandmentioning

confidence: 99%

“…2); the energy of the G (O,O,O) level of the Vstate remains in doubt since J ungen et al 3 puts it at 30 904 em -I, Kasahara et al \0 at 30 542 em -I, and Ochi et al 9 in the region of 30200 em-I.…”

mentioning

confidence: 98%

See 4 more Smart Citations

Intra–inter polyad mixing and breaking of symmetric–antisymmetric selection rule in the vibrational spectra of CS2 molecule

Pique

Manners

Sitja

et al. 1992

The Journal of Chemical Physics

View full text Add to dashboard Cite

International audienceA laser system composed of tunable lasers pumped by a copper vapor laser (Oxford Lasers Cu60) is described in this paper. The high resolution obtained with this system has allowed excitation of selective rotational levels of the 15 V and 10 V vibrational bands of the V 1B2 excited electronic state of the CS2 molecule in its vapor phase (̃100 mTorr). The rotational assignment of the excitation spectra was accomplished by observing the dispersed fluorescence. We show that it is not necessary to use a supersonic jet in order to assign the emission spectra of CS2. The goal of this work is to study the highly excited vibrational states of the ground electronic state of CS2 up to the first dissociation limit. For our purpose, there are two important consequences of the particular geometry of the 15 V excitation, which is just below and close to the bending potential barrier of the V 1B2 state. First, a very good Franck-Condon overlap in the excitation and a large Franck-Condon access to high vibrational states, as high as 20 000 cm-1, allow observation of the dispersed fluorescence through a high resolution monochromator with an OMA detector. This avoids the need for more complicated techniques, like SEP spectroscopy. Moreover, we show for the first time, that, in the V 1B2 excited state, a strong Coriolis interaction Q32 Q3 Jc couples the bending (0,3,0) and antisymmetric stretching levels (0,0,1). This breaking of the symmetric-antisymmetric selection rule gives access to the antisymetric stretching levels of the ground electronic state X̃ Σ+g from the 15 V excitation. We also show that, below 12 000 cm-1, the vibrational couplings of CS2 can be described by a model of 2 degrees of freedom, which includes a strong 1:2 Fermi resonance and accidental resonant perturbations between adjacent polyads which is probably a first step in the transition to a chaotic regime in CS2

show abstract

Section: Inm)mentioning

confidence: 94%

Section: Absorption Band Of the Vapor Phase Csmentioning

confidence: 99%

Section: Dispersed Fluorescence Spectra From the 10 V And 15 Vbandmentioning

confidence: 99%

“…A particular coupling between adjacent polyads could be easily described in the effective Hamiltonian by a matrix element which couples the states IVI ,vLv 3 ) and…”

Section: Dispersed Fluorescence Spectra From the 10 V And 15 Vbandmentioning

confidence: 99%

mentioning

confidence: 98%

See 3 more Smart Citations

Intra–inter polyad mixing and breaking of symmetric–antisymmetric selection rule in the vibrational spectra of CS2 molecule

Pique

Manners

Sitja

et al. 1992

The Journal of Chemical Physics

View full text Add to dashboard Cite

show abstract

Laser photoelectron spectroscopy: spectroscopy and dynamics of excited states in small and medium‐sized molecules

Lange

2001

Advances in Chemical Physics

View full text Add to dashboard Cite

The Influence of Weak Magnetic Fields on Radiationless Processes

Küttner

Selzle

Schlag

1977

Israel Journal of Chemistry

View full text Add to dashboard Cite

Magnetic effects on the fluorescence from singlet excited states represent an interesting new method of studying the behaviour of excited states. Here the intersystem crossing in a weak magnetic field in both protonated and deuterated glyoxal was studied. Fluorescence quenching was observed at various pressures with different collision partners as a function of the magnetic field. Time resolved emission and excitation spectra were observed and quenching rate constants were determined with and without magnetic field. The collision free fluorescence lifetime of glyoxal was found to be unaffected by the magnetic field. The magnetic fluorescence quenching effect is only observed in the presence of colliders and is seen as an enhancement of intersystem crossing. In protonated glyoxal all phosphorescence is collision dependent, whereas in the deuterated species there exists zero pressure phosphorescence. The magnetic effect is here interpreted as being due to the interaction of the singlet with the triplet state, which is magnetically sensitive. In particular additional intersystem crossing mechanisms are postulated to be operative in the presence of a magnetic field. A grouptheoretical method predicts which new frequencies must be involved in this new process, and this activity is experimentally confirmed in the emission spectrum.

show abstract

Ultraviolet absorption of CS2 near the N2 laser wavelengths (3371 Å)

Cited by 32 publications

References 4 publications

Intra–inter polyad mixing and breaking of symmetric–antisymmetric selection rule in the vibrational spectra of CS2 molecule

Intra–inter polyad mixing and breaking of symmetric–antisymmetric selection rule in the vibrational spectra of CS2 molecule

Laser photoelectron spectroscopy: spectroscopy and dynamics of excited states in small and medium‐sized molecules

The Influence of Weak Magnetic Fields on Radiationless Processes

Contact Info

Product

Resources

About