Results 271 to 280 of about 106,522 (343)

Inorganic Sulfur Dioxide Surrogate-Involved Multicomponent Reductive Cross-Coupling: A Straightforward Functional Sulfone Construction and Linkage.

Angewandte Chemie, 2019
Sulfone motifs have attracted considerable interest due to their extensive applications in pharmaceuticals and organic photoconducting materials. Conventionally, sulfones are prepared via the oxidation of sulfides with strong oxidants, which has low ...
Yingying Meng, Ming Wang, Xuefeng Jiang
semanticscholar   +1 more source

Chitosan activated with divinyl sulfone: a new heterofunctional support for enzyme immobilization. Application in the immobilization of lipase B from Candida antarctica.

International Journal of Biological Macromolecules, 2019
A novel heterofunctional support for enzyme immobilization, chitosan-divinyl sulfone, was assessed in this study. The activation of chitosan with DVS was carried out at three different pHs (10.0, 12.5 and 14.0) and a Candida antarctica Lipase B (CALB ...
Bruna B. Pinheiro, N. S. Rios, E. Rodríguez Aguado, R. Fernández-Lafuente, Tiago M Freire, P. Fechine, J. C. D. dos Santos, L. Gonçalves   +7 more
semanticscholar   +1 more source

Sulfone-assisted-NH4I as electrolyte additive with synergistic dissolution and catalysis effects on reducing the activation voltage of Li2S cathode

Chemical Engineering Journal, 2020
Li2S is highly desired for high energy-density lithium sulfur batteries since it allows to be matched with Li metal-free anodes and alleviates the volume expansion of S cathode.
Pengcheng Shi, Xin Liang, Kun Xu, Yi Sun, Sheng Cheng, Chun-hua Chen, H. Xiang   +6 more
semanticscholar   +1 more source

Distribution of fipronil in humans, and adverse health outcomes of in utero fipronil sulfone exposure in newborns.

International Journal of Hygiene and Environmental Health, 2019
Fipronil is a highly effective insecticide with extensive usages; however, its distribution and toxic/health effects in the human population after chronic exposure have not yet been clearly identified. Our objectives were to determine the levels of serum
Young Ah Kim, Y. Yoon, H. Kim, S. J. Jeon, Elizabeth Cole, Jeongsun Lee, Y. Kho, Y. Cho   +7 more
semanticscholar   +1 more source

Metal-organic framework anchored sulfonated poly(ether sulfone) as a high temperature proton exchange membrane for fuel cells

Journal of Membrane Science, 2018
A proton-conducting sulfonated poly(ether sulfone)-metal-organic framework membrane with high proton conductivity at high temperature and anhydrous conditions was synthesized by anchoring the Cr-MIL-101-NH2 to the aromatic polymer backbone via a Hinsberg
Nosaibe Anahidzade, A. Abdolmaleki, M. Dinari, Koorosh Firouz Tadavani, M. Zhiani   +4 more
semanticscholar   +1 more source

General sulfone construction via sulfur dioxide surrogate control

, 2020
A highly efficient one-step synthesis of alkyl–alkyl and aryl–alkyl sulfones with a facile combination of halides, sulfur dioxide surrogates and phosphate esters is described.
Shihao Chen, Yaping Li, Ming Wang, Xuefeng Jiang   +3 more
semanticscholar   +1 more source

Sulfonated poly ether sulfone/heteropoly acid composite membranes as electrolytes for the improved power generation of proton exchange membrane fuel cells

Composites Part B: Engineering, 2018
The organic/inorganic hybrid membranes consisting of different concentrations of phosphotungstic acid (PWA) in sulfonated poly ether sulfone (SPES) were constructed for the usage as electrolyte in proton exchange membrane fuel cells (PEMFCs).
A. Kim, C. Park, Mohanraj Vinothkannan, D. Yoo   +3 more
semanticscholar   +1 more source

Aryl Methyl Sulfone Construction from Eco-Friendly Inorganic Sulfur Dioxide and Methyl Reagents.

ChemSusChem, 2019
A three-component cross-coupling protocol of boronic acid, sodium metabisulfite, and dimethyl carbonate was developed for the construction of significant functional methyl sulfones, in which introduction of sulfur dioxide at the last stage was ...
Ming Wang, Jiaoyan Zhao, Xuefeng Jiang
semanticscholar   +1 more source

Sulfone-linked paracyclophanes

Chemical Communications, 1998
Oxidation of the macrocyclic thioether sulfones (SϕSO2ϕ)n (ϕ = 1,4-phenylene; n = 2 or 3) affords sulfone-linked paracyclophanes (ϕSO2)4 and (ϕSO2)6; single crystal X-ray analysis reveals the tetramer, (ϕSO2)4, to be a near-perfect square box, whilst the hexamer, (ϕSO2)6, adopts a much more irregular conformation; exhaustive oxidation of (SϕSO2ϕ)4 ...
I. BAXTER, H. M. COLQUHOUN, P. HODGE, KOHNKE, Franz Heinrich, D. J. WILLIAMS   +4 more
openaire   +2 more sources

Amphiphilic perfluoroalkylated sulfones and sulfonate betaines

Journal of Fluorine Chemistry, 2007
Abstract Two types of perfluoro alkyl-containing amphiphilic sulfones 7 – 9 and 13 – 15 , respectively, and sulfonate betaines 23 – 32 were prepared using 2-[(perfluoroalkyl)methyl]oxiranes ( 1–3 , R F  = C 4 F 9 , C 6 F 13 , C 8 F 17 ) or 3-(perfluoroalkyl)propyl iodides ( 16 and 17 , R F  = C 6 F 13 , C 8 F 17 ) as the starting compounds ...
Robert Kaplánek, Oldřich Paleta
openaire   +1 more source