Synthesis of novel perfluorosulfonamide monomers and their application

Synthesis of difluoroethyl perfluorosulfonate monomer and its application

“…The equivalent weight and the proton conductivity were measured as described previously [11]. DMA was performed at a frequency of 35 Hz and a heating rate of 1 8C/min using an A&D RHEOVIBRON DDV-01FP.…”

“…The protonated compound 18 can be converted to the vinyl compound 17 by lithium hexamethyldisilazide (LHMDS) according to our previous reported method [11,12]. The proposed mechanism is shown in Scheme 5.…”

Membrane Electrolytes, from Perfluorosulfonic Acid (PFSA) to Hydrocarbon Ionomers

“…There seems to be a number of other candidates suitable as a third comonomer (e.g., trifluorovinyl monomers containing phosphonic acid, sulfonamide, sulfonimide, and/or cross-linkable moieties) [8][9][10][11][12]; however, high production cost of these rather complex perfluorinated vinyl compounds may be an obstacle to the practical industrial applications.…”

Synthesis of novel perfluoroalkyl-containing polyethers

“…It is well known that perfluoropolymers exhibit excellent chemical and thermal stability, low activities of surface energy, refractive index, dielectric constant and friction coefficient [1][2][3][4][5][6]. However, these compounds, in general, reveal extremely low solubility in organic medium.…”

“…1H-Z, m, CFCH), 5.63 (1H-E, dd,3 J H,H = 15.8 Hz,3 J H,F = 12.2 Hz, CFCH), 6.11 (1H-Z, m, CFCH CH),6.45 (1H-E, dm, 3 J H,H = 15.8 Hz, CFCH CH); 19 F NMR (376.5 MHz, CDCl 3 ), d: Tributyltin hydride was prepared by LiAlH 4 reduction of tributyltin chloride and distilled, bp 101-104 8C/5 Torr. Tributyltin hydride (0.052 mol) and 0.05 mol of compound (4b, 4c), kept under nitrogen, was stirred by magnet bar at 95 8C, as Bz 2 O 2 (2.5 mmol) was added dropwise during 4 h. In case of compound 4b further distillation under reduced pressure gave pure compound 8b (analysis according to GC) (the first fraction of distillation) (see bp).…”