Results 251 to 260 of about 57,645 (308)

Vinyl sulfones

Acta Crystallographica Section C Crystal Structure Communications, 2008
Four neutral vinyl sulfones, two of which are paired with phosphonate groups, are described. The compounds are diisopropyl (2-phenylethenylsulfonylmethyl)phosphonate, C(15)H(23)O(5)PS, (I), diisopropyl {[2-(7-methoxy-1,3-benzodioxol-5-yl)ethenylsulfonyl]methylsulfonylmethyl}phosphonate, C(18)H(27)O(10)PS(2), (II), bis(trans-2-phenylethenyl) sulfone, C ...
Jessica H, Wong, Marilyn M, Olmstead, James C, Fettinger, Jacquelyn, Gervay-Hague   +3 more
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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
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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
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Synthesis of nucleoside sulfonates and sulfones

Tetrahedron Letters, 1991
Abstract Sulfonate analogues of adenine, cytidine and guanine monophosphates have been synthesized for the first time. The synthesis of ribose 3-sulfonate, a synthesis of sulfonyl disaccharides and dinucleotides and an improved synthesis of a ribose 3-sulfone is also reported.
Branislav Musicki, Theodore S. Widlanski
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Polybenzimidazole block sulfonated poly(arylene ether sulfone) ionomers

Chemical Communications, 2011
Novel ionomers based on polybenzimidazole block sulfonated poly(arylene ether sulfone) show excellent thermal properties. The ionic aggregation of sulfonic acid groups leads to well-developed phase separated morphology and thus high proton conductivity at wide humidity range, up to 65 mS cm(-1) at 90% relative humidity.
Feifei, Ng, Byungchan, Bae, Kenji, Miyatake, Masahiro, Watanabe   +3 more
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Sulfonated poly(ether sulfone ether ketone ketone)/sulfonated poly(ether sulfone) blend membranes with reduced methanol permeability

High Performance Polymers, 2012
Proton exchange membranes were prepared by blending sulfonated poly(ether sulfone ether ketone ketone) (SPESEKK) with sulfonated poly(ether sulfone) (SPES). The morphology, tensile strength, proton conductivity and methanol permeability of the blend membranes were investigated.
Rong Zeng, Shuqin Xiao, Lie Chen, Yiwang Chen   +3 more
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Sulfonated poly(ether sulfone)/sulfonated polybenzimidazole blend membrane for fuel cell applications

European Polymer Journal, 2010
Abstract Polymer blending is used to modify or improve the dimensional and thermal stability of any two different polymers or copolymers. In this study, both sulfonated polybenzimidazole homopolymer (MS-p-PBI 100) and sulfonated poly(aryl ether benzimidazole) copolymers (MS-p-PBI 50, 60, 70, 80, 90) were successfully synthesized from commercially ...
Krishnan, NN Krishnan, N. Nambi, Lee, HJ Lee, Hye-Jin, Kim, HJ Kim, Hyoung-Juhn, Kim, JY Kim, Ju-Yong, Hwang, I Hwang, Inchul, Jang, JH Jang, Jong Hyun, Cho, EA Cho, Eun Ae, Kim, SK Kim, Soo-Kil, Henkensmeier, D Henkensmeier, Dirk, Hong, SA Hong, Seong-Ahn, Lim, TH Lim, Tae-Hoon   +10 more
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Pervaporation behavior of asymmetric sulfonated polysulfones and sulfonated poly(ether sulfone) membranes

Journal of Applied Polymer Science, 2000
The sulfonation of polymers and the pervaporation behavior of asymmetric polymeric membranes are described in this study. We confirmed that the sulfonic acid group was successively introduced into the polymer chain by FTIR and 1H-NMR characterization.
I. S. Byun, I. C. Kim, J. W. Seo
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Synthesis of carbohydrate sulfonates and sulfonate esters

The Journal of Organic Chemistry, 1990
La reaction d'esters α-lithio sulfonates avec des hydrures de carbohydrates primaires est une voie simple de synthese de sulfonates-analogues de phosphates hydrocarbones importants comme le glucose 6-phosphate, le ribose 5-phosphate et l'uridine 5-phosphate.
Branislav Musicki, Theodore S. Widlanski
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Sulfones Insaturées. I. Préparation et Constitution des Sulfones Investigées. Tautomérie des Sulfones

Recueil des Travaux Chimiques des Pays-Bas, 1937
AbstractLe but initial de mes recherches sur l'influence du groupe SO2sur la liaison double était exclusivement l'application de la méthode à l'acide borique de Böeseken aux diols eis‐ et trans‐ des sulfones cycliques, dérivées des butadiènes. Il va sans dire que la détermination de la constitution des sulfones insaturées devait précéder la préparation
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