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

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 res...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2016-08, Vol.55 (33), p.9685-9689
Main Authors: Ji, Guipeng, Yang, Zhenzhen, Zhang, Hongye, Zhao, Yanfei, Yu, Bo, Ma, Zhishuang, Liu, Zhimin
Format: Article
Language:English
Subjects:
Alcohols
Ammonium
Aqueous solutions
Azo polymers
Carbon dioxide
Carbon sequestration
Chemical synthesis
CO2 conversion
Coordination compounds
Copper
diazo-coupling reaction
Metals
o-hydroxyazobenzene
Oxidation
Phenolic compounds
Phenols
Polymers
porous organic polymers
Structural hierarchy
Zinc
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Summary: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. CO2 just POPs in: In water and without any templates, hierarchically mesoporous o‐hydroxyazobenzene polymers with high surface areas are synthesized. The porous organic polymers (POPs) showed excellent solubility in polar and apolar solvents, good adsorption capacity for metal ions, ultrahigh selectivity for CO2/N2 separation, and excellent performance for catalyzing CO2 conversion.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201602667