The a1Δg→X3Σ−g magnetic dipole transition of S2

Setzer, K.D.; Kalb, Martin; Fink, E.H.

doi:10.1016/s0022-2852(03)00174-7

Cited by 19 publications

(20 citation statements)

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“…Analogous near-resonant excitation of the b 1 R + states by O 2 (a 1 D g ) has been found for the isoelectronic molecules S 2 [12] and Se 2 [13]. Due to the long radiative lifetimes of the b state molecules, in all three systems the energy exchange processes (1) proceed in both directions and equilibria are established.…”

Section: Discussionsupporting

confidence: 55%

“…Only recently, we have succeeded in finding the a ? X bands of five more species, S 2 [12], Se 2 [13], SeS, TeO, and TeSe, by using energy transfer processes from O 2 (a 1 D g ) in fast-flow systems for excitation and searching for the inherently weak emissions with a Fourier-transform spectrometer equipped with a sensitive InSb detector. In the present paper we report on a reinvestigation of the b 1 R + ?…”

Section: Introductionmentioning

confidence: 99%

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The b1Σ+(b0+)→X3Σ−(X10+, X21) and a1Δ(a2)→X3Σ−(X21) transitions of SeS

Setzer

Kalb

Fink

2008

Journal of Molecular Spectroscopy

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Section: Discussionsupporting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

The b1Σ+(b0+)→X3Σ−(X10+, X21) and a1Δ(a2)→X3Σ−(X21) transitions of SeS

Setzer

Kalb

Fink

2008

Journal of Molecular Spectroscopy

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“…4). Studies by Setzer et al 39 of fast flow discharges containing singlet O 2 , however, indicate that while the a 1 D g -state of O 2 is not rapidly quenched by collisions, deactivation of the b 1 S g + -state is efficient. In support of collisional b 1 S g + -state deactivation we note that the introduction of extra water (which is usually already present in low amounts in gas handling systems) is found to increase the a 1 D g -state population in the discharge.…”

Section: Discussionmentioning

confidence: 97%

Photodissociation of singlet oxygen in the UV region

Farooq

Chestakov

Yan

et al. 2014

Phys. Chem. Chem. Phys.

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Photodissociation of singlet oxygen, O2 a(1)Δg, by ultraviolet radiation in the region from 200 to 240 nm has been investigated using velocity map imaging of the atomic oxygen photofragments. Singlet oxygen molecules are generated in a pulsed discharge and studied by one-laser photodissociation and detection around 226 nm as well as two color photodissociation at various wavelengths in the range from 200 to 240 nm. A simple model of the discharge on and off signal indicates efficient conversion of O2 X(3)Σg(-)(v = 0) in the parent beam to O2 a(1)Δg(v = 0-2). Minute amounts of highly excited vibrational levels of ground state O2 X(3)Σg(-)(v > 0) are detected but no evidence is found for production of the O2 b(1)Σg(+) state. Over the decreasing wavelength range 240-200 nm the a(1)Δg-state signal relative to the X(3)Σg(-)(v = 0) signal decreases strongly. Around 226 nm the a(1)Δg(v = 0-2) states averaged branching ratio percentage for O((3)Pjj = 2 : 1 : 0) is found to be 56 : 36 : 8 (±5%), respectively. The anisotropy parameter for photodissociation of a(1)Δg(v = 0-2) averages to β = 1.3 ± 0.4. The a(1)Δg(v = 0) photodissociation cross section is found to 3-10 times stronger than theory predicts. Furthermore, the photodissociation image shows a strong parallel character, (i.e., transition moment parallel to the molecular axis) while theory predicts a predominantly negative character.

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“…Sulfur isotopes with mass 34 therefore play a significant role in the mass spectra. For instance, they lead to mass interference between 34 SS and DS 2 .…”

Section: Sh + Sh (+M) -mentioning

confidence: 99%

Photodetachment-photoelectron spectroscopy of disulfanide: the ground and first excited electronic state of HS2 and DS2

Entfellner

Boesl

2009

Phys. Chem. Chem. Phys.

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Photodetachment-photoelectron spectra of HS(2)(-) and DS(2)(-) are presented. The obtained electron affinities (EA (HS(2)) = 1.916 +/- 0.015 eV and EA (DS(2)) = 1.918 +/- 0.015 eV) are in good agreement with earlier results (S. Moran and G. B. Ellison, J. Phys. Chem., 1988, 92, 1794). Photodetachment into the neutral ground state of the radicals HS(2) and DS(2) leads to excitation of the S-S stretching mode, whereas photodetachment into the first excited state causes a S-S-H bending and a weak S-H stretching motion. Additionally, weak peaks of S(2) were observed in the spectra of HS(2) and DS(2), leading to the conclusion that photodetachment with 2.77 eV (448 nm) causes dissociation of HS(2)(-) and DS(2)(-) into S(2)(-) and H/D. Taking 2.77 eV as an upper limit for D(0)(S(2)(-)-H) a lower limit for Delta(f)H(0)(HS(2 (g))) of 100.8 kJ mol(-1) is obtained which is an improvement on the literature value of 107.145 +/- 10.46 kJ mol(-1).

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The a1Δg→X3Σ−g magnetic dipole transition of S2

Cited by 19 publications

References 19 publications

The b1Σ+(b0+)→X3Σ−(X10+, X21) and a1Δ(a2)→X3Σ−(X21) transitions of SeS

The b1Σ+(b0+)→X3Σ−(X10+, X21) and a1Δ(a2)→X3Σ−(X21) transitions of SeS

Photodissociation of singlet oxygen in the UV region

Photodetachment-photoelectron spectroscopy of disulfanide: the ground and first excited electronic state of HS2 and DS2

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