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)
-
-
Malisoff,Marks
, p. 1114,1118, 1119 (1931)
-
-
McCoy,Weiss
, p. 1928,1930 (1954)
-
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.
A Dinuclear Persulfide-Bridged Ruthenium Compound is a Hypoxia-Selective Hydrogen Sulfide (H2S) Donor
Woods, Joshua J.,Wilson, Justin J.
supporting information, p. 1588 - 1592 (2020/11/30)
Hydrogen sulfide (H2S) is a gaseous molecule that has received attention for its role in biological processes and therapeutic potential in diseases, such as ischemic reperfusion injury. Despite its clinical relevance, delivery of H2S to biological systems is hampered by its toxicity at high concentrations. Herein, we report the first metal-based H2S donor that delivers this gas selectively to hypoxic cells. We further show that H2S release from this compound protects H9c2 rat cardiomyoblasts from an in vitro model of ischemic reperfusion injury. These results validate the utility of redox-activated metal complexes as hypoxia-selective H2S-releasing agents for use as tools to study the role of this gaseous molecule in complex biological systems.
Generation of H2S from Thiol-Dependent NO Reactivity of Model [4Fe-4S] Cluster and Roussin's Black Anion
Oakley, Kady M.,Zhao, Ziyi,Lehane, Ryan L.,Ma, Ji,Kim, Eunsuk
, p. 15910 - 15917 (2021/07/20)
Iron-sulfur clusters (Fe-S) have been well established as a target for nitric oxide (NO) in biological systems. Complementary to protein-bound studies, synthetic models have provided a platform to study what iron nitrosylated products and byproducts are produced depending on a controlled reaction environment. We have previously shown a model [2Fe-2S] system that produced a dinitrosyl iron complex (DNIC) upon nitrosylation along with hydrogen sulfide (H2S), another important gasotransmitter, in the presence of thiol, and hypothesized a similar reactivity pattern with [4Fe-4S] clusters which have largely produced inconsistent reaction products across biological and synthetic systems. Roussin's black anion (RBA), [Fe4(μ3-S)3(NO)7]-, is a previously established reaction product from synthetic [4Fe-4S] clusters with NO. Here, we present a new reactivity for the nitrosylation of a synthetic [4Fe-4S] cluster in the presence of thiol and thiolate. [Et4N]2[Fe4S4(SPh)4] (1) was nitrosylated in the presence of excess PhSH to generate H2S and an "RBA-like"intermediate that when further reacted with [NEt4][SPh] produced a {Fe(NO)2}9 DNIC, [Et4N][Fe(NO)2(SPh)2] (2). This "RBA-like"intermediate proved difficult to isolate but shares striking similarities to RBA in the presence of thiol based on IR υ(NO) stretching frequencies. Surprisingly, the same reaction products were produced when the reaction started with RBA and thiol. Similar to 1/NO, RBA in the presence of thiol and thiolate generates stoichiometric amounts of DNIC while releasing its bridging sulfides as H2S. These results suggest not only that RBA may not be the final product of [4Fe-4S] + NO but also that RBA has unprecedented reactivity with thiols and thiolates which may explain current challenges around identifying biological nitrosylated Fe-S clusters.