聚酯纤维
亲核细胞
化学
有机化学
烷氧基
溴化物
羧酸
离子液体
溴化氢
卤化物
催化作用
烷基
溴
作者
Wei Zeng,Yanfei Zhao,Fengtao Zhang,Rongxiang Li,Minhao Tang,Xiaoqian Chang,Ying Wang,Fengtian Wu,Buxing Han,Zhimin Liu
标识
DOI:10.1038/s41467-023-44604-1
摘要
Abstract Chemical recycling of plastic wastes is of great significance for sustainable development, which also represents a largely untapped opportunity for the synthesis of value-added chemicals. Herein, we report a novel and general strategy to degrade polyesters via directly breaking the C alkoxy -O bond by nucleophilic substitution of halide anion of ionic liquids under mild conditions. Combined with hydrogenation over Pd/C, 1-butyl-2,3-dimethylimidazolium bromide can realize the deconstruction of various polyesters including aromatic and aliphatic ones, copolyesters and polyester mixtures into corresponding carboxylic acids and alkanes; meanwhile, tetrabutylphosphonium bromide can also achieve direct decomposition of the polyesters with β -H into carboxylic acids and alkenes under hydrogen- and metal-free conditions. It is found that the hydrogen-bonding interaction between ionic liquid and ester group in polyester enhances the nucleophilicity of halide anion and activates the C alkoxy -O bond. The findings demonstrate how polyester wastes can be a viable feedstock for the production of carboxylic acids and hydrocarbons.
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