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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
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201811263
Subject(s) - triptycene , supramolecular chemistry , crystallization , crystal engineering , hydrogen bond , crystallography , materials science , porosity , translational symmetry , chemistry , topology (electrical circuits) , crystal structure , molecule , nanotechnology , organic chemistry , physics , mathematics , combinatorics , composite material , condensed matter physics
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.