3-Mercapto-l-propanesulfonic acid sodium

Han et al. [64, 66] reported the synthesis of highly conductive and thermally stable self-doped mercaptopropanesulfonic-acid-substituted polyanilines by the concurrent reduction and substitution reaction between polyaniline and a nucleophile. These reactions were carried out on both electrochemically generated and free standing polyaniline films prepared from emeraldine base dissolved in N-methylpyrrolidinone. The electrochemically prepared films were dedoped with 5 % aqueous NaiCOs to convert them the into the emeraldine base form. The sulfonated polyaniline was prepared by reaction of a polyaniline emeraldine base film with 0.1 M 3-mercapto-l-propanesulfonic acid sodium salt in methanol under nitrogen at room temperature for approximately 14h [66]. A catalytic amount (0.01 M) of acetic acid was reported to accelerate the reaction. The resulting sulfonated polyaniline film was thoroughly rinsed with methanol, followed by 5 % aqueous NaiCOs to remove reactants. 

SCHEME 8.7 Schematic illustration of the process of ozone prelrealment, graft copolymerization PVDF with PMA, preparation of PVDF-g-PPMA membrane with clickable surface by phase inversion, preparation of functional PVDF-g-P[PMA-cZ/ck-MPS] membranes via surface thiol-yne click reaction of thiols on the PVDF-g-PPMA membrane, and preparation of PVDF-g-P[PMA-c//ck-P-CD] membranes via surface alkyne-azide click reaction on the PVDF-g-PPMA membranes. PVDF, poly(vinylidene fluoride) PMA, propargyl methacrylate MPS, 3-mercapto-l-propanesulfonic acid sodium salt azido-fl-CD, mono(6-azido-6-desoxy)-P-cyclodexIrin. Reprinted with permission from Reference 168. Copyright 2011 American Chemical Society. 

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