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Controlling the Stacking Modes of Metal–Organic Framework Nanosheets through Host–Guest Noncovalent Interactions
Author(s) -
Tang WenQi,
Zhao YingJie,
Xu Ming,
Xu JinYa,
Meng ShaSha,
Yin YunDong,
Zhang QingHua,
Gu Lin,
Liu DaHuan,
Gu ZhiYuan
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202014673
Subject(s) - stacking , nanosheet , benzene , metal organic framework , non covalent interactions , steric effects , materials science , nanopore , metal , crystallography , chemistry , nanotechnology , chemical engineering , molecule , stereochemistry , organic chemistry , hydrogen bond , adsorption , engineering
Abstract The tuning of metal–organic framework (MOF) nanosheet stacking modes from molecular level was rarely explored although it significantly affected the properties and applications of nanosheets. Here, the different stacking modes of Zr‐1, 3, 5‐(4‐carboxylphenyl)‐benzene framework nanosheets were synthesized through the induction of different host–guest noncovalent interactions. The solvents of methyl benzene and ethyl acetate induced twisted stacking of nanosheets with the specific rotation angles of 12°, 18°, 24° and 6°, 18°, 24°, 30°, respectively, which was in agreement with theoretical calculations. Meanwhile, the alkanes were likely to vertically enter the pores of Zr‐BTB nanosheets because of steric hindrance and hydrophobic interactions, resulting in the untwisted stacking of nanosheets. The untwisted ordered nanopores showed the excellent gas chromatographic separations of benzene derivative isomers, which was better than twisted nanosheets stacking and commercial columns. This work uncovers a rational strategy to control the stacking of two‐dimensional MOF nanosheets.