7783-06-4Relevant articles and documents
Factors affecting the hydrogen reduction kinetics of CsHSO4
Ponomareva,Lavrova
, p. 85 - 89 (2009)
The hydrogen reduction of CsHSO4, including in the presence of catalysts, is studied. The main factors affecting the rate of the process are determined. A possible reaction mechanism through the surface hydrated phase is discussed. Experiments
Fresenius, R.
, p. 339 - 339 (1887)
Tsang
, p. 1498 (1964)
Thompson, C. J. T.,Meyer, R. A.,Ball, J. S.
, p. 3284 - 3287 (1952)
Reaction between sulfur hexafluoride and hydrogen iodide
Padma,Vasudeva Murthy
, p. 1653 - 1654 (1964)
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Malisoff,Marks
, p. 1114,1118, 1119 (1931)
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McCoy,Weiss
, p. 1928,1930 (1954)
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Vogel, E.
, p. 214 (1875)
Meites, L.
, p. 4479 - 4481 (1951)
Bacon, R. F.,Fanelli, R.
, p. 639 - 648 (1943)
Wallenfels, K.,Hofmann, D.
, (1962)
Roth, H.
, p. 379 - 392 (1951)
Bock et al.
, p. 1663 (1977)
Samahy et al.
, p. 3177 (1964)
Vasudeva Murthy, A. R.
, p. 23 - 28 (1953)
LATTICE VIBRATION SPECTRA Part LXIV. Raman spectroscopic study of lithium hydrogensulfide LiSH: dynamic disorder and order-disorder phase transition
Beckenkamp, K.,Lutz, H. D.,Jacobs, H.,Metzner, U.
, p. 203 - 213 (1991)
Raman spectra (4000-50 cm-1) of lithium hydrogensulfide are recorded in the range from 70 to 300 K.The temperature dependence of frequencies and halfwidths of the SH- stretching and librational modes yields clear evidence for a disorder-order phase transition at 222 K and thermally activated dynamic disorder of the SH- ions in the room temperature polymorph.Down to 70 K the increasing splitting of the in-plane libration can be interpreted by a Landau-type order parameter.This splitting reflects increasing dynamic interactions (factor group splitting) of adjacent (in ) SH- ions due to the ordering process.The halfwidths of the stretching and out-of-plane librational modes exhibits an Arrhenius-type behaviour.The activation energies derived are 1.9 kJ mol-1 for both vibrations.The activation temperature (230 K) is in good agreement with that of the change of the specific heat at 228 K.The order mechanism and a plausible structure of the ordered phase below 222 K are discussed.
Kroto,Suffolk
, p. 545 (1972)
George, Z. M.
, p. 218 - 224 (1974)
Reynolds, E. J.
, p. 146 - 147 (1864)
Synthesis and X-ray diffraction characterization of FeNdSbS4, an analog of berthierite
Gasymov,Gasymova,Aliev
, p. 1095 - 1096 (2004)
A rare-earth-containing analog of the mineral berthierite, with the composition FeNdSbS4, was synthesized for the first time. FeNdSbS4 is isostructural with FeSb2S4 and crystallizes in orthorhombic symmetry (sp. gr. Pbam, Z = 4) with lattice parameters a = 11.395 A, b = 14.136 A, and c = 3.747 A.
Packer,Winchester
, p. 826 (1968)
Wendt,Landauer
, p. 510 (1922)
Dubois,M.R.,Vanderveer,M.C.,Dubois,D.L.
, p. 7456 (1980)
Edwards, J. G.,Wiedemeier, H.,Gilles, P. W.
, p. 2935 - 2938 (1966)
Sulfur-33 Isotope Tracing of the Hydrodesulfurization Process: Insights into the Reaction Mechanism, Catalyst Characterization and Improvement
Sushkevich, Vitaly L.,Popov, Andrey G.,Ivanova, Irina I.
, p. 10872 - 10876 (2017)
The novel approach based on 33S isotope tracing is proposed for the elucidation of hydrodesulfurization (HDS) mechanisms and characterization of molybdenum sulfide catalysts. The technique involves sulfidation of the catalyst with 33S-isotope-labeled dihydrogen sulfide, followed by monitoring the fate of the 33S isotope in the course of the hydrodesulfurization reaction by online mass spectrometry and characterization of the catalyst after the reaction by temperature-programmed oxidation with mass spectrometry (TPO-MS). The results point to different pathways of thiophene transformation over Co or Ni-promoted and unpromoted molybdenum sulfide catalysts, provide information on the role of promoter and give a key for the design of new efficient HDS catalysts.
Polymersome Wound Dressing Spray Capable of Bacterial Inhibition and H2S Generation for Complete Diabetic Wound Healing
Liu, Danqing,Liao, Yuyao,Cornel, Erik Jan,Lv, Mingchen,Wu, Tong,Zhang, Xinyue,Fan, Liujie,Sun, Min,Zhu, Yunqing,Fan, Zhen,Du, Jianzhong
, p. 7972 - 7985 (2021/11/01)
Diabetic wounds are difficult to heal due to recurrent bacterial infection, decreased proliferation, and migration of epidermal and endothelial cells. This is related to impaired leukocyte function and low blood concentrations of H2S in diabetic patients. Herein, an antibacterial polymersome-based wound dressing spray was demonstrated for complete diabetic wound healing. The designed polymersome was self-assembled from poly(?-caprolactone)24-block-poly[lysine15-stat-(S-aroylthiooxime)23] [PCL24-b-P(Lys23-stat-SATO15)], where PCL is the hydrophobic membrane-forming block and P(Lys-stat-SATO) acts as a hydrophilic stabilizer block. The polymersomes can penetrate and kill Gram-positive and Gram-negative bacteria because of the electrostatic interaction induced by the antibacterial P(Lys23-stat-SATO15) block. Furthermore, the SATO segments are capable of long-term H2S generation by reacting with cysteine (up to 12 h). This promotes proliferation, migration of epidermal and endothelial cells, and angiogenesis. Overall, this polymersome-based wound dressing spray acts as a bacterial inhibitor and H2S generator and offers a fresh insight into the effective treatment of diabetic wounds.
N-Methylation of Self-Immolative Thiocarbamates Provides Insights into the Mechanism of Carbonyl Sulfide Release
Levinn, Carolyn M.,Mancuso, Jenna L.,Lutz, Rachel E.,Smith, Haley M.,Hendon, Christopher H.,Pluth, Michael D.
, p. 5443 - 5451 (2021/05/07)
Hydrogen sulfide (H2S) is an important biomolecule, and self-immolative thiocarbamates have shown great promise as triggerable H2S donors with suitable analogous control compounds; however, thiocarbamates with electron-deficient payloads are less efficient H2S donors. We report here the synthesis and study of a series of N-methylated esterase-triggered thiocarbamates that block the postulated unproductive deprotonation-based pathway for these compounds. The relative reaction profiles for H2S release across a series of electron-rich and electron-poor N-Me aniline payloads are examined experimentally and computationally. We show that thiocarbamate N-methylation does block some side reactivity and increases the H2S release profiles for electron-poor donors. Additionally, we show that isothiocyanate release is not a competitive pathway, and rather that the reduced efficiency of electron-poor donors is likely due to other side reactions.
Evolution of Structural, Thermal, Optical, and Vibrational Properties of Sc2S3, ScCuS2, and BaScCuS3 Semiconductors
Aleksandrovsky, Aleksandr S.,Andreev, Oleg V.,Azarapin, Nikita O.,Leonidov, Ivan I.,Maximov, Nikolai G.,Oreshonkov, Aleksandr S.,Razumkova, Illaria A.,Shestakov, Nikolai P.
, p. 3355 - 3366 (2021/08/23)
In the present work, we report on the synthesis of Sc2S3, ScCuS2 and BaScCuS3 powders using a method based on oxides sulfidation and modification of their properties. The crystal structures and morphology of samples are verified by XRD and SEM techniques. Thermal stability has been studied by DTA which has revealed that Sc2S3 decomposes to ScS through melting at 1877 K. ScCuS2 and BaScCuS3 melt incongruently at temperatures of 1618 K and 1535 K, respectively. The electronic structure calculations show that the investigated compounds are semiconductors with indirect band gap (Eg). According to the diffuse reflection spectroscopy, Sc2S3, ScCuS2 and BaScCuS3 are wide-bandgap semiconductors featured the Eg values of 2.53 eV, 2.05 eV and 2.06 eV, respectively. The band gap decreases with the introduction of copper (I) and barium cations into the crystal structure of the compounds. Variation of local structure has been verified by Raman and infrared spectroscopy. The calculated vibrational modes of ScCuS2 correspond to CuS4 and Sc?S layer vibrations, even though ScS6 octahedra-like structural units can be found in the structure.