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Functionalized Base‐Stable Metal–Organic Frameworks for Selective CO 2 Adsorption and Proton Conduction
Author(s) -
He Tao,
Zhang YongZheng,
Wu Hao,
Kong XiangJing,
Liu XiaoMin,
Xie LinHua,
Dou Yibo,
Li JianRong
Publication year - 2017
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201700650
Subject(s) - isostructural , metal organic framework , adsorption , proton , chemistry , chemical stability , metal , surface modification , conductivity , base (topology) , selectivity , inorganic chemistry , chemical engineering , materials science , crystallography , organic chemistry , crystal structure , mathematical analysis , physics , mathematics , quantum mechanics , engineering , catalysis
Metal–organic frameworks (MOFs) have shown great potential for application in various fields, including CO 2 capture and proton conduction. For promoting their practical applications, both optimization of a given property and enhancement of chemical stability are crucial. In this work, three base‐stable isostructural MOFs, [Ni 8 (OH) 4 (H 2 O) 2 (BDP‐X) 6 ] (Ni–BDP‐X; H 2 BDP=1,4‐bis(4‐pyrazolyl)benzene, X=CHO, CN, COOH) with different functional groups, are designed, synthesized, and used in CO 2 capture and proton conduction experiments. They possess face‐centered cubic topological structures with functional nanoscale cavities. Importantly, these MOFs are fairly stable to maintain their structures in boiling water and 4 M sodium hydroxide solution at room temperature. Functionalization endows them with tunable properties. In gas adsorption studies, these MOFs exhibit selective adsorption of CO 2 over CH 4 and N 2 , and in particular the introduction of COOH groups provides the highest selectivity. In addition, the COOH‐functionalized Ni–BDP exhibits a high proton conductivity of 2.22×10 −3 S cm −1 at 80 °C and approximately 97 % relative humidity.