Polystyrene-Supported Cu/2,2,6,6-Tetramethyl-1-piperidine-N-oxyl Catalytic Systems Constructed by Nanoprecipitation and Their Cooperative Catalysis for Benzyl Alcohol Oxidation
Polystyrene-Supported Cu/2,2,6,6-Tetramethyl-1-piperidine-N-oxyl Catalytic Systems Constructed by Nanoprecipitation and Their Cooperative Catalysis for Benzyl Alcohol Oxidation
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DOI：
10.1021/acsapm.1c00909
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发表时间：
2021-09
影响因子：
5
通讯作者：
Tianyou Chen;Zihao Wang;W. Xiao;Chang-feng Yi;Zushun Xu
中科院分区：
文献类型：
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作者：
Tianyou Chen;Zihao Wang;W. Xiao;Chang-feng Yi;Zushun Xu
将多功能均相催化剂转化为相应的多相催化体系，使催化反应具有经济和环境两方面的意义。本文以铜/2，2，6，6-四甲基-1-哌啶-N-氧基(TEMPO)催化体系为例，设计了一种可控、高效的负载型多功能催化剂的制备策略。首次采用水相纳米沉淀法制备了聚苯乙烯负载的铜/TEMPO催化剂，并对苯甲醇(BnOH)的有氧氧化反应进行了研究。合作行为可以通过精确控制局部官能团的浓度来调节。我们已经证明，在聚苯乙烯载体中引入官能团可以更好地利用限制增强合作所产生的催化成分。这一策略通过建立结构-活性关系，为构建更高效的多功能多相催化剂提供了途径。
Transformation of multifunctional homogeneous catalysts to the corresponding heterogeneous catalytic systems makes catalytic reactions interesting from both economic and environmental points of view. Here, we have devised a controllable and efficient strategy for the preparation of supported multifunctional catalysts by taking the Cu/2,2,6,6-tetramethyl-1-piperidine-N-oxyl (TEMPO) catalytic system as an example. Polystyrene-supported Cu/TEMPO catalysts were, for the first time, prepared via nanoprecipitation of polymers in water and efficient for aerobic oxidation of benzyl alcohol (BnOH). Cooperative behaviors could be regulated by precise control of local concentrations of functional groups. We have demonstrated that the incorporation of functional groups into polystyrene supports can make better use of catalytic components, resulting from confinement-enhanced cooperation. This strategy provides access to build more efficient multifunctional heterogeneous catalysts through establishing structure–activity relationships.