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.
Thermodynamics of the Zinc Sulphide Transformation, Sphalerite -> Wurtzite, by Modified Entrainment
Gardner, Peter J.,Pang, Peter
, (1988)
The dissociative sublimation of both α- and β-zinc sulphide, ZnS(c) = Zn(g) + 1/2S2(g), has been studied by modified entrainment in the temperature range 1010-1445 K.The following free-energy equation were derived: ΔG0(α)/J mol-1 = 3
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.
Infrared spectroscopy and 266 nm photolysis of H2S2 in solid Ar
Isoniemi, Esa,Khriachtchev, Leonid,Pettersson, Mika,Raesaenen, Markku
, p. 47 - 54 (1999)
The infrared spectra of H2S2 and its 266 nm photolysis products are studied in an Ar matrix at 7.5 K. The antisymmetric and symmetric HS-stretching, and the antisymmetric bending of H2S2 are assigned at 2556.6, 2553.8 and 880.3 cm-1, respectively. The absorptions appearing during the photolysis at 2463, 2460 and 903 cm-1 are tentatively assigned to the HS2 radical. The two main dissociation channels are: H2S2+hν → HS2+H and H2S2+hν → S2+H2, with a branching ratio close to 1.
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.
Thermal analysis of heterocyclic thione donor complexes. Part VII1 1 For Part VI see ref. 1.. Palladium(II) and platinum(II) complexes of thizole-thiolates
Raper, Eric S.,Britton, Amanda M.,Creighton, James R.
, p. 241 - 249 (1989)
The thermal decomposition of benzothiazoline-2-thiolate, thiazolidine-2-thiolate and thiazoline-2-thiolate complexes of general formula M2L4, where M = Pd and Pt, were studied in air by means of TG and DTG, and by means of DTA in din
Real-time monitoring of a photoactivated hydrogen persulfide donor for biological entities
Chaudhuri, Amrita,Venkatesh, Yarra,Jena, Bikash Chandra,Behara, Krishna Kalyani,Mandal, Mahitosh,Singh, N.D. Pradeep
supporting information, p. 8800 - 8805 (2019/10/22)
Hydrogen persulfide (H2S2) plays an important role in sulfur-based redox signaling mechanisms. Herein, we developed a visible light activated ESIPT based H2S2 donor using a p-hydroxyphenacyl phototrigger. The unique feature of the designed H2S2 donor system is the ability to monitor the H2S2 release in real time through a non-invasive fluorescence color change approach, with the color changing from green to blue. Next, we demonstrated the detection and quantification of H2S2 using a fluorescein based "turn-on" fluorescent probe. Furthermore, in vitro studies of the designed H2S2 donor demonstrated the real-time monitored H2S2 release and cytoprotective ability in the highly oxidizing cellular environment of MDA-MB-468 cells.
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.
Formation of Mo and MoSx nanoparticles on Au(1 1 1) from Mo(CO)6 and S2 precursors: Electronic and chemical properties
Rodriguez, José A.,Dvorak, Joseph,Jirsak, Tomas,Hrbek, Jan
, p. 315 - 326 (2008/10/08)
Mo(CO)6 can be useful as a precursor for the preparation of Mo and MoSx nanoparticles on a Au(1 1 1) substrate. On this surface the carbonyl adsorbs intact at 100 K and desorbs at temperatures lower than 300 K. Under these conditions, the dissociation of the Mo(CO)6 molecule is negligible and a desorption channel clearly dominates. An efficient dissociation channel was found after dosing Mo(CO)6 at high temperatures (400 K). The decomposition of Mo(CO)6 yields the small coverages of pure Mo that are necessary for the formation of Mo nanoclusters on the Au(1 1 1) substrate. At large coverages of Mo (0.15 ML), the dissociation of Mo(CO)6 produces also C and O adatoms. Mo nanoclusters bonded to Au(1 1 1) exhibit a surprising low reactivity towards CO. Mo/Au(1 1 1) surfaces with Mo coverages below 0.1 ML adsorb the CO molecule weakly (desorption temperaturex nanoparticles. The formed MoSx species are more reactive towards thiophene than extended MoS2(0002) surfaces, MoSx films or MoSx/Al2O3 catalysts. This could be a consequence of special adsorption sites and/or distinctive electronic properties that favor bonding interactions with sulfur-containing molecules.
