53144-50-6Relevant articles and documents
Inorganic Mediator toward Organosulfide Active Material: Anchoring and Electrocatalysis
Fan, Qianqian,Guo, Wei,Si, Yubing,Wang, Xin,Wang, Bo,Fu, Yongzhu
, (2021)
Organosulfides are promising high-capacity cathode materials for rechargeable lithium batteries. However, they are hindered by several key challenges including the electronic/ionic insulation and solubility issues of the discharged products. Herein, TiS2 nanosheets@carbon nanotubes (TiS2 NSs@MWCNT) are proposed as a promoter and booster toward phenyl tetrasulfide (PTS). It serves as a bifunctional mediator, not only anchoring active materials in the cathode through chemical adsorption but also facilitating the reaction kinetics. The Li-organosulfide cell yields a reversible discharge capacity of 467.6 mAh g?1 and a high capacity retention of 81.9% after 200 cycles at 0.5 C rate. When the PTS areal mass loading is 5.8 mg cm?2 and the electrolyte/PTS ratio is 3.8 μL mg?1, a high specific capacity of 444 mAh g?1 at 0.5 C rate can still be achieved. The strong anchoring and electrocatalysis effects of TiS2 toward PhSLi and polysulfide are revealed using experimental and computational approaches. The study sheds light on metal sulfides as mediators to improve the cycling life of Li-organosulfide batteries and provides deep comprehension of the instinct interaction evolution at molecular level, which is invaluable for fabrication of electrode materials.
Redox Activation of Hydrogen Sulfide, Thiols, and Sulfur in Electrosynthesis of Organic Di- and Polysulfides
Shinkar’,Smolyaninov,Kuzmin,Berberova
, p. 689 - 696 (2019/06/05)
A novel and efficient method for the synthesis of biologically active organic di-, tri- and tetrasulfides has been proposed. Different methods of redox activation of sulfur, hydrogen sulfide, and thiols in the reactions with organic compounds have been considered. Electrochemical initiation of the reactions of the mediator–H2S–S8 system with cyclohexane, methylcyclohexane, and benzene has occurred to the formation of polysulfides R2Sn (n = 2–4). The application of tetrabutylammonium bromide as a mediator of H2S oxidation has allowed to decrease the anodic overpotential of electrosynthesis. Di- and tetrasulfides have been obtained under anodic activation of the cycloalkanethiols (C5, C6) or thiophenol in the reaction with sulfur. Electroreduction of S8 in the presence of the same thiols has favored the formation of di- and trisulfides. The yield and the ratio of the R5Sn (n = 2–4) depend on the method of redox activation of the thiolating reagent.
Synthesis and antimicrobial activities of structurally novel S,S′-bis(heterosubstituted) disulfides
Ramaraju, Praveen,Gergeres, Danielle,Turos, Edward,Dickey, Sonja,Lim, Daniel V.,Thomas, John,Anderson, Burt
experimental part, p. 3623 - 3631 (2012/07/16)
The central focus of this study is on the antibacterial and antifungal properties of synthetically produced S,S′-bis(heterosubstituted) disulfides as a means to control the growth of various infection-causing pathogens. Staphylococcus aureus, Francisella tularensis and Candida albicans were each found to be highly susceptible to several of these compounds by agar or broth dilution and Kirby-Bauer diffusion assays. These structurally simple, low molecular weight disulfides have shown promising bioactivities and may serve as leads to the development of effective new antibacterials for pathogenic bacteria such as methicillin-resistant S. aureus and F. tularensis.
