Abstract
Abstract Aromatically brominated polystyrene resins are promising while their facile synthesis remains a challenge. Herein, the macroporous post-crosslinked poly(divinylbenzene-co-ethylstyrene) resin (PCPD) was directly aromatically brominated with Br2 in water without any catalyst, and the aromatically brominated resin (PCPD-B) possessed a high content of bromine at about 30%. In particular, the bromination reaction proceeded so quickly that the bromine content reached 21% within 10 min, and the reaction formed a closed circulation system by oxidization of HBr to Br2 in the presence of the inorganics. The adsorption of 2-aminothiazole and tryptophan on the resulting resin was enhanced as compared with PCPD, and hydrophobic interaction was the main driving force. Experimental data indicated that PCPD-B was superior to the commercial resin SP207 for the adsorption of 2-aminothiazole due to the enhanced hydrophobicity of PCPD-B owning to the bromine distribution on the resin surface.
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