23550-45-0Relevant articles and documents
Two-Photon Photochemistry of CS2: Formation of S2 (v2) and CS(v10) at 308 nm
Sapers, S. P.,Donaldson, D. J.
, p. 8918 - 8921 (1990)
Room-temperature CS2 is photolyzed at 308 nm in a low-pressure flow cell.Laser-excited fluorescence is used to observe both CS(v10) and S2(v2) products 10μs after the excimer laser pulse.Both products display a quadratic dependence on the excimer laser intensity.These results are consistent with a two-photon excitation of CS2 to a high-lying electronic state (near 154 nm) which predissociated to S and CS, followed by reaction of the S atom with undissociated CS2.
PHOTODISSOCIATION OF (OCS)2 AND (CS2)2: COMPETING PHOTOCHEMICAL PATHWAYS
Prinslow, Douglas A.,Vaida, Veronica
, p. 1836 - 1840 (1989)
The photochemistry of (OCS)2 and (CS2)2 is investigated by using resonance-enhanced multiphoton ionization.The competition between van der Waals and covalent bond chemistry occurring upon electronic excitation of the dimers is probed, and the energetic and kinetic factors affecting this competition are examined.Photodissociation of the 1Σ+ state of OCS in a dimer is investigated and found to produce a significant amount of S2.Photodissotiation of the 1B2(1Σu+) state of CS2 in a dimer leads to the production of S2 and C2S2 photoproducts.These fragments are obtained as a result of covalent bond photochemistry of the respective dimers.There appears to be a greater tendency toward van der Waals bond dissociation in (CS2)2 compared with (OCS)2, in agreement with expectations based on differences in energetics and excited-state dynamics of the two dimers.
Product energy disposal in the nonadiabatic reaction S(1D) + CS2 --> S2 (X3Σ-g) + CS (X1Σ+)
Sapers, Steven P.,Andraos, Nancy,Donaldson, D.J.
, p. 1738 - 1745 (1991)
The product energy disposal in the reaction S(1D) + CS2 --> S2 +CS is measured via laser-induced fluorescence.Molecular sulphur is produced exclusively in its electronic ground state (3Σ-g) with up to 3 quanta of vibrational excitation and rotational excitation that roughly approximates a 1000 K Boltzmann distribution.The CS produced from the reaction is formed predominantly in its vibrationless state.The total internal energy content of the product molecular sulphur is only about 12percent of the total available energy of the reaction: the CS fragment also has minimal internal energy, implying that most of the reaction energy resides in product translation.These results are different from those observed in the isovalent S + OCS reaction and suggest that a different detailed mechanism is operative.
Vapour pressure of solid Bi2S3
Piacente, V.,Gianfreda, V. D.,Bardi, G.
, p. 7 - 14 (1983)
A vaporization study of solid bismuth sulfide, carried out by using two different techniques in the temperatur range 614 to 695 K, showed that this compound vaporizes according to the reaction Bi2S3(s) = 2 Bi(l) + 3/2 S2(g).The resulting pressure-temperature equation for S2(g) is log10(p/Pa) = (15.1 +/- 0.4) - (9540 +/- 250) (K/T).The standard enthalpy of the vaporization process of Bi2S3, ΔH0 (298.15 K) = (254 +/- 10) kJ * mol-1 has been determined as average of values obtained by second- and third-law treatments of the results.
Lewis,Lacey
, p. 1976,2786 (1915)
Alternative pathway of H2S and polysulfides production from sulfurated catalytic-cysteine of reaction intermediates of 3-mercaptopyruvate sulfurtransferase
Nagahara, Noriyuki,Koike, Shin,Nirasawa, Takashi,Kimura, Hideo,Ogasawara, Yuki
, p. 648 - 653 (2018/01/27)
It has been known that hydrogen sulfide and/or polysulfides are produced from a (poly)sulfurated sulfur-acceptor substrate of 3-mercaptopyruvate sulfurtransferase (MST) via thioredoxin (Trx) reduction in vitro. In this study, we used thiosulfate as the donor substrate and the catalytic reaction was terminated on the formation of a persulfide or polysulfides. We can present alternative pathway of production of hydrogen sulfide and/or polysulfides from (poly)sulfurated catalytic-site cysteine of reaction intermediates of MST via Trx reduction. Matrix-assisted laser desorption ionization tandem time-of-flight mass spectrometric analysis revealed that after prolonged incubation of MST with thiosulfate, a trisulfide adduct becomes predominant at the sulfurated catalytic-site cysteine. When these adducts were reduced by Trx with reducing system (MST:Escherichia coli Trx:E. coli Trx reductase:NADPH = 1:5:0.02:12.5 molar ratio), liquid chromatography with tandem mass spectrometric analysis for monobromobimane-derivatized H2Sn revealed that H2S2 first appeared, and then H2S and H2S3 did later. The results were confirmed by high-performance liquid chromatography-fluorescence analysis.
Low-temperature thermoluminescence in solid argon: Short-range mobility of atoms
Khriachtchev, Leonid,Pettersson, Mika,Pehkonen, Susanna,Isoniemi, Esa,Raesaenen, Markku
, p. 1650 - 1657 (2007/10/03)
The 193-nm photolysis of S2 (produced from H2S2) and SO2 in solid argon and the changes introduced by annealing are monitored by using Fourier-transform infrared spectroscopy and laser-induced fluorescence. The results highlight short-range atomic mobility distinguished from global long-range mobility. It is shown that under the 193-nm irradiation a small part of S2 and SO2 molecules undergo photodecomposition yielding quasi-isolated pairs where the fragments are in close vicinity to each other. In annealing, the short-range mobility results in recombination of these pairs at rather low temperatures (a static Ar lattice support this scenario, demonstrating that the photofragments can be gently separated by a low potential barrier which favors their recombination in annealing. In particular, this quasistable configuration occurs when the two atoms occupy substitutional sites separated by the lattice parameter of 5.31 A.
