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Capsule–Capsule Conversion by Guest Encapsulation
Author(s) -
Wang Shitao,
Sawada Tomohisa,
Ohara Kazuaki,
Yamaguchi Kentaro,
Fujita Makoto
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201509278
Subject(s) - capsule , octahedron , chemistry , trigonal bipyramidal molecular geometry , ethylenediamine , trigonal crystal system , stereochemistry , crystallography , crystal structure , organic chemistry , biology , botany
Guest‐induced M 18 L 6 –M 24 L 8 capsule–capsule conversion is reported. Both capsules are composed of Pd II ethylenediamine units (M) and 1,3,5‐tris(3,5‐pyrimidyl)pyrimidine (L), and form trigonal bipyramidal (M 18 L 6 ) and octahedral (M 24 L 8 ) closed‐shell structures with huge hydrophobic inner spaces. The M 18 L 6 trigonal bipyramid is converted to the M 24 L 8 octahedron through encapsulation of large aromatic guests, with the latter capsule possessing a cavity volume three times larger than the former. Despite the dynamic properties of the capsule host, the encapsulated guests are difficult to extract and are thus isolated from the external environment.