Polymer modification sulfoxide

Furthermore, it is entirely reasonable that an understanding of the shapes of these simple polymers will allow discrete or radical modification and then extension of the range of oxidations to encompass Baeyer-Villiger reactions and sulfoxidations. 

Liu, Y. Vederas, J. C. Modification of the Swem Oxidation Use of Stoichiometric Amounts of an Easily Separable, Recyclable, and Odorless Sulfoxide That Can Be Polymer-Bound, J. Org. Chem. 1996, 61, 7856. 

While attached to the resin, the isolated moiety can undergo further chemical manipulation with the PS-thiophenol acting as a linker moiety. Cleavage is achieved by the addition of an amine (primary or secondary), causing nucleophilic displacement from the resin, which also results in additional modification of the molecule (eq 6). The functionalized polymer acts as a traceless linker without the need for oxidation to the sulfone or sulfoxide. 

Modification of the Swem oxidation has also been achieved by the use of a soluble, polymer-bound, recyclable, and odorless sulfoxide 1873a [1394]. Sulfoxides bound... 

The practical applications of fluoropolymer membranes especially in the areas of purification and separation related to potable water production, wastewater treatment and bioprocessing, have been limited to some extent by their hydrophobic and inert surface properties. Among the different modification techniques, graft copolymerization of hydrophilic monomers, or inimers for further surface reactions, from fiuoropolymers has been useful and effective in improving the physicochemical properties of the parent fluoropolymer with minimum alteration of their desirable bulk properties. Apart from fiilly fluorinated polymers, most of the partially fluorinated polymers can dissolve in polar organic solvents, such as Ai,Ai-dimethylformamide (DMF), A,A-dimethylacetamide (DMAc), NMP, and dimethyl sulfoxide (DMSO), but are insoluble in water, alcohols, and hydrocarbons. 

Certain polymers, such as polyaniline, in their neutral form are soluble in A/-methyl pyrrolidone (NMP) [2], A/,A/-dimethylpropylene urea (DMPU) [3], and dimethyl sulfoxide (DMSO). Films of neutral polymer can be cast from these solutions. Chemical modification of monomers has proved to be effective in enhancing the modification solubility, especially with polythiophene [4,5]. In other instances, such as poly(p-phenylenevinylene), processibility has been achieved by synthesizing solu-tion-processible precursors, which could be subsequently converted to the conjugated polymer [6]. Nonetheless these techniques have failed to provide a method... 

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