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Interpenetration Isomerism in Triptycene‐Based Hydrogen‐Bonded Organic Frameworks
Author(s) -
Li Penghao,
Li Peng,
Ryder Matthew R.,
Liu Zhichang,
Stern Charlotte L.,
Farha Omar K.,
Stoddart J. Fraser
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201811263
Subject(s) - triptycene , supramolecular chemistry , crystallization , materials science , hydrogen bond , porosity , crystallography , translational symmetry , crystal engineering , topology (electrical circuits) , chemistry , crystal structure , nanotechnology , molecule , organic chemistry , mathematics , composite material , combinatorics , geometry
We describe an example of “interpenetration isomerism” in three‐dimensional hydrogen‐bonded organic frameworks. By exploiting the crystallization conditions for a peripherally extended triptycene H 6 PET, we can modulate the interpenetration of the assembled frameworks, yielding a two‐fold interpenetrated structure PETHOF‐ 1 and a five‐fold interpenetrated structure PETHOF‐ 2 as interpenetration isomers. In PETHOF‐ 1 , two individual nets are related by inversion symmetry and form an interwoven topology with a large guest‐accessible volume of about 80 %. In PETHOF‐ 2 , five individual nets are related by translational symmetry and are stacked in an alternating fashion. The activated materials show permanent porosity with Brunauer‐Emmett‐Teller surface areas exceeding 1100 m 2 g −1 . Synthetic control over the framework interpenetration could serve as a new strategy to construct complex supramolecular architectures from simple organic building blocks.