Hierarchically Mesoporous o-Hydroxyazobenzene Polymers: Synthesis and Their Applications in CO2 Capture and Conversion

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• 作者：Guipeng Ji ; Dr. Zhenzhen Yang ; Dr. Hongye Zhang ; Dr. Yanfei Zhao ; Dr. Bo Yu ; Zhishuang Ma and Prof. Dr. Zhimin Liu
• 刊名：Angewandte Chemie International Edition
• 出版年：2016
• 出版时间：August 8, 2016
• 年：2016
• 卷：55
• 期：33
• 页码：9685-9689
• 全文大小：1431K
• ISSN：1521-3773

文摘

The synthesis of hierarchically mesoporous polymers with multiple functionalities is challenging. Herein we reported a template-free strategy for synthesis of phenolic azo-polymers with hierarchical porous structures based on diazo-coupling reaction in aqueous solution under mild conditions. The resultant polymers have surface areas up to 593 m² g⁻¹ with the mesopore ratio of >80 %, and a good ability to complex with metal ions, such as Cu²⁺, Zn²⁺,Ni²⁺, achieving a metal loading up to 26.24 wt %. Moreover, the polymers complexed with Zn showed excellent performance for catalyzing the reaction of CO₂ with epoxide, affording a TOF of 2570 h⁻¹ in the presence of tetrabutyl ammonium bromide (7.2 mol %). The polymer complexed with Cu could catalyze the oxidation of alcohol with high efficiency.