Vinyl pivalate

α-D-glucose, maltodextrin, α-CD, vinyl pivalate, vinyl benzoate, pyrene, and dimethylsulfoxide (DMSO) were purchased from Sigma Aldrich. β-CD, γ-CD, vinyl laurate, and vinyl stearate were obtained from Tokyo Chemical Industry Co., Ltd. N, N-dimethylformamide (DMF, anhydrous 99.8%) was obtained from Alfa Aesar, a Johnson Matthey Company. Organic solvents such as methanol and ethanol were of analytical reagent grade, and the water used was triply distilled. Thin-layer chromatography (TLC) was carried out on Merck Kieselgel 60 F₂₅₄ analytical plates with the specified solvent system. The detection and visualization are followed by spraying 5% sulfuric acid-ethanol and heating for 2 min at 170 °C.

All reagents were analytical grade (PA) and used without prior purification. Methyl methacrylate (MMA) 99%, vinyl pivalate (VPi) 99%, hexadecane 99%, benzoyl peroxide 75% and ethylene glycol dimethylacrylate (EGDMA) 98% were purchased from Sigma-Aldrich Brasil Ltda. (Rio de Janeiro, Brazil). Hydrochloric acid (HCl) 36.5–38% and oleic acid 99% were purchased from Synth (São Paulo, Brazil). Ferric chloride hexahydrate (FeCl₃·6H₂O) 97%, ferrous sulfate heptahydrate (FeSO₄·7H₂O) 99%, sodium hydroxide (NaOH) 99% and potassium persulfate (KPS) 99% were purchased from Vetec Química Fina Ltda. (Rio de Janeiro, Brazil) and 90% pure sodium dodecyl sulfate (SDS) was supplied by Reagen Produtos para Laboratórios Ltda. (Parana, Brazil). Nitrogen gas was supplied by White Martins Gases Industriais Ltda. (Rio de Janeiro, Brazil) with 99.5% purity. Scheme 1 illustrates the experimental protocol for the synthesis of poly(Methyl methacrylate)/Fe₃O₄/poly(vinyl pivalate) magnetic core–shell nanoparticles.