A pH-responsive phase transformation of a sulfonated metal–organic framework from amorphous to crystalline for efficient CO2 capture

Zhigang Hu; Jiajin Lin; Naoki Ogiwara; Alvaro Rodriguez; Yongwu Peng; Yuxiang Wang; Satoshi Horike; Dan Zhao

doi:10.1039/C6CE00369A

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A pH-responsive phase transformation of a sulfonated metal–organic framework from amorphous to crystalline for efficient CO₂ capture†

Zhigang Hu,^a Jiajin Lin,^a Naoki Ogiwara,^b Alvaro Rodriguez,^a Yongwu Peng,^a Yuxiang Wang,^a Satoshi Horike*^b and Dan Zhao

*^a

Author affiliations

* Corresponding authors

^a Department of Chemical & Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585 Singapore
E-mail: chezhao@nus.edu.sg

^b Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
E-mail: horike@sbchem.kyoto-u.ac.jp

Abstract

We report a pH-responsive phase transformation of a sulfonated MOF from amorphous UiO-66-SO₃H to crystalline UiO-66-SO₃M (M = Li, Na, K). Such transformation is obtained via neutralizing UiO-66-SO₃H with the according alkali hydroxide solutions. EXAFS and FTIR results suggest that the recovered crystallinity can be attributed to the breakage of strong hydrogen bonds among the sulfonic acids in UiO-66-SO₃H as well as the subsequent charge repulsion in UiO-66-SO₃M to expand the collapsed framework.

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Article information

DOI: https://doi.org/10.1039/C6CE00369A
Article type: Communication
Submitted: 13 Feb 2016
Accepted: 07 Mar 2016
First published: 22 Mar 2016

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CrystEngComm, 2016,18, 2803-2807

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A pH-responsive phase transformation of a sulfonated metal–organic framework from amorphous to crystalline for efficient CO₂ capture

Z. Hu, J. Lin, N. Ogiwara, A. Rodriguez, Y. Peng, Y. Wang, S. Horike and D. Zhao, CrystEngComm, 2016, 18, 2803 DOI: 10.1039/C6CE00369A

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