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Polymer containing isatin was synthesized by super acid-catalyzed carbon–carbon coupling reaction. Propylsulfonic acid was grafted on isatin unit by substitution reaction with potassium salt of 3-bromo-1-propanesulfonic acid. The sulfonic acid composition was regulated at 25–80 mol % of propylsulfonic acid in order to achieve expected ion exchange capacity of maximum 2.0 meq/g. The copolymers were...
IronIII sulfophenyl phosphate (FeSPP) is successfully synthesized by an optimized process from the reaction of ironIII chloride and m-sulfophenyl phosphonic acid (msPPA) by a simple and environmentally friendly method. Experimental results show FeSPP has a kind of layered structure, and multilayer sheet is about 2 nm thick. FeSPP exhibits good thermal stability and does not decompose under 200 °C...
Sulfonated poly(phthalazinone ether sulfone ketone) (SPPESK)‐based composite membranes doped with hydrated tungsten oxide were prepared and studied for proton‐exchange membrane applications. Hydrated tungsten oxide (WO3· 2H2O) was synthesized from acidic hydrolysis of sodium tungstate. The SPPESK/WO3 composite membranes were prepared by mixing proper amounts of SPPESK and hydrated WO3 in dimethylacetamide...
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