Sulfonic Acid Generating Polymers for 146 nm Irradiation.

The potential of anticomplement synthetic sulfonic polymers for xenotransplantation.

IN IMMEDIATELY vascularized xenografts, the presence of species-specific preformed natural antibodies associated with the activation of the host complement system has been reported to induce hyperacute humoral rejection in discordant combinations. Furthermore, complement activation on the endothelial cells of xenografts has been suggested to play a major role in hyperacute rejection. On the oth...

Highly proton conductive nanoporous coordination polymers with sulfonic acid groups on the pore surface.

Three new sulfonated porous coordination polymers (PCPs)/metal-organic frameworks (MOFs) have been synthesized using solvothermal methods. These PCPs possess porous structures with non-coordinating sulfonic acid groups or sulfonate with dimethyl ammonium cations and exhibit high proton conductivity at a low humidity of 60% RH (relative humidity) at ambient temperature.

Materials for Advanced Microlithography: Polymers for 157 Nm Lithography and Acid Diffusion Measurements

Genistein-3′-sulfonic acid dihydrate

IN THE TITLE COMPOUND [SYSTEMATIC NAME: 5-(5,7-dihydr-oxy-4-oxo-4H-chromen-yl)-2-hydroxy-benzene-sulfonic acid dihydrate], C(15)H(10)O(8)S·2H(2)O, the benzopyran-one ring is not coplanar with the phenyl ring, the dihedral angle between them being 41.35 (3)°. No H atom was placed on the sulphonic acid group because it was not possible to distinguish between the two S=O bonds and the S-O bond. In...

Phthalimide-N-sulfonic acid and Isatin-N-sulfonic acid as highly efficient catalysts for the synthesis of bis-coumarins

Two highly efficient protocols for the production of bis-coumarins under solvent-free conditions have been introduced. The reaction of 4-hydroxycoumarin (2 eq.) with arylaldehydes (1 eq.) using phthalimide-N-sulfonic acid (PhtSA) or isatin-N-sulfonic acid (IsSA), as solid-acid catalysts, afforded the mentioned compounds with good to excellent yields in short times.Briefly, we have introduced tw...