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Anisotropically Swelling Gels Attained through Axis‐Dependent Crosslinking of MOF Crystals
Author(s) -
Ishiwata Takumi,
Kokado Kenta,
Sada Kazuki
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201611338
Subject(s) - swelling , monomer , polymer , materials science , hydrolysis , yield (engineering) , crystal (programming language) , chemical engineering , anisotropy , polymer chemistry , chemistry , composite material , organic chemistry , optics , physics , computer science , engineering , programming language
Anisotropically deforming objects have attracted considerable interest for use in molecular machines and artificial muscles. Herein, we focus on a new approach based on the crystal crosslinking of organic ligands in a pillared‐layer metal–organic framework (PLMOF). The approach involves the transformation from crosslinked PLMOF to polymer gels through hydrolysis of the coordination bonds between the organic ligands and metal ions, giving a network polymer that exhibits anisotropic swelling. The anisotropic monomer arrangement in the PLMOF underwent axis‐dependent crosslinking to yield anisotropically swelling gels. Therefore, the crystal crosslinking of MOFs should be a useful method for creating actuators with designable deformation properties.