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  4. Systematic Tuning and Multifunctionalization of Covalent Organic Polymers for Enhanced Carbon Capture
 
research article

Systematic Tuning and Multifunctionalization of Covalent Organic Polymers for Enhanced Carbon Capture

Xiang, Zhonghua
•
Mercado, Rocio
•
Huck, Johanna M.
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2015
Journal Of The American Chemical Society

Porous covalent polymers are attracting increasing interest in the fields of gas adsorption, gas separation, and catalysis due to their fertile synthetic polymer chemistry, large internal surface areas, and ultrahigh hydrothermal stabilities. While precisely manipulating the porosities of porous organic materials for targeted applications remains challenging, we show how a large degree of diversity can be achieved in covalent organic polymers by incorporating multiple functionalities into a single framework, as is done for crystalline porous materials. Here, we synthesized 17 novel porous covalent organic polymers (COPs) with finely tuned porosities, a wide range of Brunauer Emmett Teller (BET) specific surface areas of 430-3624 m(2) g(-1), and a broad range of pore volumes of 0.24-3.50 cm(3) g(-1), all achieved by tailoring the length and geometry of building blocks. Furthermore, we are the first to successfully incorporate more than three distinct functional groups into one phase for porous organic materials, which has been previously demonstrated in crystalline metal organic frameworks (MOFs). COPs decorated with multiple functional groups in one phase can lead to enhanced properties that are not simply linear combinations of the pure component properties. For instance, in the dibromobenzene-lined frameworks, the bi- and multifunctionalized COPs exhibit selectivities for carbon dioxide over nitrogen twice as large as any of the singly functionalized COPs. These multifunctionalized frameworks also exhibit a lower parasitic energy cost for carbon capture at typical flue gas conditions than any of the singly functionalized frameworks. Despite the significant improvement, these frameworks do not yet outperform the current state-of-art technology for carbon capture. Nonetheless, the tuning strategy presented here opens up avenues for the design of novel catalysts, the synthesis of functional sensors from these materials, and the improvement in the performance of existing covalent organic polymers by multifunctionalization.

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Type
research article
DOI
10.1021/jacs.5b06266
Web of Science ID

WOS:000363438600019

Author(s)
Xiang, Zhonghua
Mercado, Rocio
Huck, Johanna M.
Wang, Hui
Guo, Zhanhu
Wang, Wenchuan
Cao, Dapeng
Haranczyk, Maciej
Smit, Berend  
Date Issued

2015

Publisher

American Chemical Society

Published in
Journal Of The American Chemical Society
Volume

137

Issue

41

Start page

13301

End page

13307

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LSMO  
Available on Infoscience
December 2, 2015
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/121075
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