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Acetates of α‐1,3‐glucan dissolved in N,N‐dimethyl acetamide/LiCl are prepared by converting the polysaccharide with acetyl chloride, acetic acid anhydride/pyridine, or with acetic acid/N,N′‐carbonyl diimidazole. Values of the degree of substitution for the acetyl groups (DSAc) of up to 2.6 are realized. NMR spectroscopic measurements reveal a preferred conversion of the primary hydroxyl group at...
Oxidative polymerization of pyrrole on the surface of platelets of graphene oxide (GO) was demonstrated to generate polypyrrole/GO (PPy/GO) hybrid assemblies. The polymerization reactions were performed in GO acid dispersions using ammonium persulfate (APS) as an oxidant. Model kinetic reactions were carried out by 1H NMR spectroscopy with APS at low temperatures. Evidence was found for an increase...
Oxidative polymerization of pyrrole on the surface of polyimide (PI) films was demonstrated to generate uniform, adherent coatings consisting of polypyrrole (PPy) electro-active nano-domains. This polymerization was carried out in aqueous methanol solution with FeCl 3 as oxidant/dopant. Model kinetic reactions carried out by hydrogen Nuclear Magnetic Resonance ( 1 H NMR) spectroscopy...
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